What is an AR-15 Lower Parts Kit? 😏
It is a package of components needed to build the lower receiver of an AR-15 rifle. This kit typically includes all the necessary parts such as the trigger, hammer, disconnector, selector, bolt catch, magazine catch, and the springs, pins, and detents that hold everything together. It’s a crucial component for firearm enthusiasts who wish to custom-build their AR-15, allowing for personalization and the opportunity to understand the mechanics of their firearm more intimately.
🔘 They are highly sought-after by firearm enthusiasts due to their exceptional features and advantages. These kits offer a remarkable level of scalability, allowing users to choose between basic and premium versions based on their specific requirements and budget. ➡️ This ensures that every individual can find a kit that perfectly aligns with their needs.
🔘 Moreover, these kits provide unparalleled comprehensiveness, as they include every tiny part required for the lower receiver. ➡️ This eliminates the hassle of sourcing individual components and guarantees that users have everything they need in one convenient package.
🔘 Furthermore, these kits are renowned for their exceptional quality and durability. They are meticulously crafted using high-quality materials, ensuring that each part is capable of withstanding high levels of stress and usage. ➡️ This ensures that firearm enthusiasts can rely on their AR-15 even in the most demanding situations, providing them with the utmost confidence and peace of mind.
🔘 In addition to their reliability, some Kits also offer improved ergonomics for triggers and selectors. ➡️ This enhances user comfort and control, making the shooting experience even more enjoyable and precise.
🔘 Last but not least, these kits cater to the customization needs of users, allowing firearm enthusiasts to personalize their AR-15 according to their preferences. ➡️ This not only enhances the functionality of the firearm but also adds a unique and personal touch.
➡️ Firstly, a lower parts kit contains every small component needed to assemble the lower receiver of an AR-15. This includes the all-important trigger group, safety selector, magazine release, bolt catch assembly, pins, springs, and detents. The comprehensiveness of a kit prevents any missing parts that could stall a rifle build.
➡️ Secondly, purchasing a purpose-built lower parts kit allows all the included components to properly interface and work in harmony right out of the box. Reputable brands design their kits for a flawless fit and seamless interaction between parts like the trigger, hammer, safety, and other controls. This results in smooth overall operation.
➡️ Moreover, the convenience of buying a pre-packaged kit means not having to source each individual small part separately. This saves time and hassle trying to track down springs, detents, etc. one by one.
➡️ In addition, these kits provide an opportunity to customize and upgrade rifle controls to your preferences. Swapping out basic parts like the pistol grip, trigger, and ambidextrous selectors allows tailoring the rifle to your shooting needs.
➡️ Finally, reputable brands engineer their lower parts kits from durable alloys and coatings built to withstand rugged use. The longevity these kits provide results in a rifle that can be handed down for generations when proper care is taken.
Maintaining and cleaning your Lower Parts Kit is essential for ensuring the performance and longevity of your firearm. Follow these steps for effective cleaning and maintenance:
- 🟢 Disassembly: Begin by disassembling your AR-15. Make sure the gun is unloaded and then remove the lower receiver, being careful not to lose any small parts.
- 🟢 Cleaning: Clean each part individually. Use a quality gun-cleaning solution and a small brush to scrub each component. Pay special attention to the trigger, hammer, and selector, as these parts often collect the most debris.
- 🟢 Inspection: After cleaning, inspect each part for signs of wear or damage. This includes checking springs for tension, inspecting pins for any bends or cracks, and examining the trigger and hammer for any signs of excessive wear.
- 🟢 Lubrication: Proper lubrication is critical to ensuring smooth operation. Apply a thin layer of high-quality gun lubricant to all moving parts, focusing on the trigger, hammer, and other controls.
- 🟢 Reassembly: Carefully reassemble your AR-15, ensuring all parts are securely in place. Test the function of all controls to confirm everything is working as expected.
- 🟢 Storage: Store your firearm in a clean, dry place to prevent rust and corrosion. If your firearm is not being used regularly, consider using a rust preventative on metal parts.
Follow these steps regularly to keep your kit in optimal condition and ensure your firearm performs flawlessly when you need it most.
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Best Lower Parts Kit AR15 Review
1# Geissele Standard Lower Parts Kit
For those who are serious about their AR15s, the Geissele Standard Lower Parts Kit No Grip is a must-have for any firearm enthusiast. This Mil-Spec kit from Geissele contains 18 essential components necessary to complete or rebuild your lower receiver—everything you need minus the grip. Among the included parts is their Posi-Lock safety system, which provides positive tactile feedback when shifting between safe and fire positions so that you can confidently trust what mode your gun is currently in.
Thanks to this durable design, this Geissele 05-343 Standard Lower Parts Kit will help ensure your lower receiver performs at its highest potential. Don’t settle for anything less than excellence; get top-quality results with the trusted Geissele Standard Lower Parts Kit without a grip package today.
2# CMMG AR-15 Lower Receiver Parts Kit
Assembling an AR-15 lower receiver doesn’t have to be complicated. With the CMMG AR-15 Lower Receiver Parts Kit, you can easily and efficiently complete the part of your gun build. This kit contains all the parts necessary to make a fully functioning lower receiver for your build. Parts are broken up into colour-coded bags, so finding and organizing components is a breeze. From springs and pins to other required parts – this kit has them all!
3# CMMG Lower Parts AR15 Gun Builder’s Kit
The CMMG Lower Parts AR15 Gun Builder’s Kit is perfect for those looking to build their own AR15-style firearm. This kit includes most of the components you need, including bolt catch, pivot pin detent, selector, and more. With everything you need in a single package, the Lower Parts Kit is an economical way to get all the small parts you need without having to buy them individually. And with a manufacturer model of 55CA601, you can rest assured that these are true mil-spec parts, so your completed AR won’t just look good – it’ll function safely and reliably.
4# CMMG AR-15 Lower Receiver Pins and Springs Parts Kit
Are you looking for the best-guaranteed way to keep your AR-15 rifle in top-quality condition? The CMMG® AR-15 Lower Receiver Pins and Springs Parts Kit will ensure that your AR-15 rifle consistently operates at peak performance levels, with all parts meeting or exceeding mil-spec standards.
Replacing standard parts often found on AR-15 rifles with this kit, you can be sure of a seamless installation and reliability when it comes to performance. The model number is 55AFF75, so next time you head out to the shooting range make sure your weapon is as good as new by replacing those necessary standard parts with this kit from CMMG®.
5# Smith & Wesson M&P AR-15 Lower Parts Kit
If you need mil-spec parts to build and customize lower receivers, then look no further than the Smith & Wesson M&P AR-15 Lower Parts Kit. This updated kit includes all of the essential parts, including bolt catches, buffers, disconnectors, hammers and pins, magazine catches, pistol grips and screws, selector detents and springs, take-down pins and springs, trigger guards roll pins and triggers. High-quality craftsmanship goes into every part to ensure your accuracy while the building is precise and consistent.
Made in the USA with superior materials such as steel alloys and heat-treated metals you can rest assured that your M&P AR-15 will last for years. For enhanced customization options, this parts kit is just what you need to ensure your receivers are exactly how you want them.
6# Aero Precision AR15 Lower Parts Kit
Are you ready to build the premium AR of your dreams? The Aero Precision AR15 Lower Parts Kit is exactly what you need. This kit includes 17 gun parts that will help you finish your custom AR15 build and provide you with optimal quality. Plus, these parts are Mil-Spec dimensions and coatings, making them engineered and designed to maximum excellence. Your dream gun needs the best parts!
Get the Aero Precision AR 15 Lower Parts kit today and make sure you have everything you need for a top-notch custom rifle. With components like a bolt catch, safety selector, takedown pin and magazine catch included in this kit, a high-quality weapon can easily become your reality.
7# Aero Precision AR15 Standard Lower Parts Kit
The Aero Precision AR15 Standard Lower Parts Kit is the perfect choice when it comes to putting together the lower of your custom AR15 build. Our parts are all manufactured to mil-spec dimensions and coated for quality assurance, so you can be confident that you’re getting the best possible interface between components. Plus, with our Enhanced Lower Parts Kit offering an upgraded Magpul MOE Grip and Aero Precision Billet Trigger Guard, you have everything you need for your build.
This kit includes a takedown/pivot spring, detent, trigger/hammer pin, takedown pin, pivot pin, bolt catch, spring and buffer; a safety selector, spring and detent; a buffer retainer and spring; a billet trigger guard and roll pin; an ergonomic Magpul MOE pistol grip; screw and lock washer; a trigger spring as well as hammer spring and disconnector spring; plus a magazine catch body – complete with spring and button – along with a hammer, trigger, disconnector components.
8# Aero Precision AR-15 Magpul MOE Lower Parts Kit
Upgrade your AR-15 with the Aero Precision AR-15 Magpul MOE Lower Parts Kit and enjoy precision, reliability and versatility. This lower parts kit is designed to fit an Aero Precision Gen 2 or similar mil-spec lower receiver. It includes all the necessary components for assembly – such as a Magpul MOE Grip in Black or FDE – as well as a Magpul MOE Trigger Guard in either colour option.
With the Aero Precision AR-15 Magpul MOE Lower Parts Kit, you get a reliable and trusted build that offers accuracy, precision and versatility no matter what your mission calls for. Take control of your build and customize it to meet all your needs whether you opt for the tried and true fire control group or go with one of our upgraded trigger kits. Get the best parts available with this combination of MIL-SPEC grade components and high-quality accessories from Magpul.
9# Bravo Company Gunfighter AR-15 Enhanced Lower Parts Kit
Replace or upgrade your AR-15 lower receiver with the Bravo Company Gunfighter AR-15 Enhanced Lower Parts Kit. This complete kit includes top-of-the-line Mil-Spec parts that have been engineered and built to offer unparalleled performance. The BCM PNT Trigger Assembly provides a smoother trigger pull while significantly reducing felt “creep.” The included BCM Pistol Grip, Mod 3, offers an aggressive texture to secure and enhance your grip while shooting.
In addition to those components, this kit also includes a BCM Enhanced Trigger Guard and various other parts renowned for their durability under use. All of these parts are guaranteed to meet Mil-Spec standards so you can trust them for any situation you encounter.
10# Jacob Grey Firearms AR-15 Lower Parts Kits
Jacob Grey Firearms bring you their premier lower receiver parts kit for the AR-15. Compatible with your favourite grip, stock, and buffer tube kit, this assortment of finely crafted components is an ideal addition to your next AR-15 build. Made to rigorous standards of quality and accessibility, each piece meets or exceeds Mil-Spec tolerances and offers a degree of precision that enthusiasts from all levels can trust.
Designed with customization in mind, assembling your own AR-15 gives you unparalleled control over this multi-functional platform. You can build it exactly how you want for use in hunting, target shooting, law enforcement operations, or even self-defence. With Jacob Grey Firearms’s complete lower receiver parts kit as part of your build process, you gain access to dependable components that facilitate a safer assembly experience.
11# RISE Armament Lower Parts Kit
Time to take your AR-15 to the next level with the RISE Armament Lower Parts Kit. Whether you need to replace a few pieces or rebuild the whole receiver, this kit is designed for maximum efficiency. It’s easy to install and comes with 20 parts specifically designed for AR-15-style rifles. Each piece undergoes rigorous testing and refinement, ensuring that it can handle even the toughest conditions.
The kit doesn’t include a trigger but does contain all of the necessary pins, safety components and more for reliable, seamless performance. A profession grade product from RISE Armament, you don’t have to worry about sacrificing quality for convenience when upgrading your firearm.
12# WMD Guns AR-15/.308 Lower Parts Kit
The WMD Guns AR-15/.308 Lower Parts Kit Mod 2 is the perfect solution for boosting the performance of your AR Rifle. This kit includes a NiB-X hammer, trigger, disconnect, bolt catch, mag catch, mag catch button, and safety selector paired with a front pivot pin, rear takedown pin, trigger guard assembly and essential pins and detents. As part of the Mod 2 iteration, this product also features nickel/black colouration in its NiB-X finish – perfect for delivering reliability against even the toughest of tasks.
13# XTS AR-15 Lower Small Parts Kit AR-KIT
The XTS AR-15 Lower Small Parts Kit is the perfect addition to your rifle. This kit from XTS is made of efficient and heavy-duty materials, making it exactly what you need for superior performance. Whether you’re a beginner shooter or simply looking to upgrade an existing rifle, this small parts kit from XTS is one of the best options on the market. It contains everything required for modifying your firearm, so you won’t have to shop around for separate pieces elsewhere.
Carefully designed with precision by top-class professionals, the parts in the XTS AR-15 Lower Small Parts Kit are guaranteed to provide optimal performance and durability on any rifle. With these expertly engineered elements working together as part of your system, you can hit targets with superior accuracy and confidence.
14# TRYBE Defense AR-15 Mil-Spec Complete Lower Parts Kit
The TRYBE Defense AR-15 Mil-Spec Complete Lower Parts Kit is everything you need to complete your AR lower receiver build. This kit includes top-of-the-line products crafted with supreme precision and quality assured by mil-spec standards. The Bolt Carrier Group, Grip & Handstop, Charging Handle, and Muzzle Break feature sleek designs and robust performance so your completed rifle will look great and keep shooting in any conditions.
Upgrade your optics with TRYBE Optics for optimal long-range targeting, accuracy, and visibility. With the included 42” Rifle Case, you can easily transport your completed rifle to and from the range or outdoors without ever sacrificing protection from shocks or scrapes.
In addition, carry all of your shooting necessities in the extra-large TRYBE Tactical Range Bag that features a multitude of pockets that can be organized to fit anything from ammunition to snacks. Make sure you have all the essentials for thorough firearm maintenance when you get home as well as exotic wood oil stocks, lubricants for all applications, cleaning kits and much more!
15# Strike Industries AR Enhanced Lower Receiver Parts
Take your AR15 to the next level with the Strike Industries AR Enhanced Lower Parts Package w/Trigger, Hammer & Disconnector. This bundle of AR15 lower parts from Strike Industries is designed to upgrade the function and quality of your weapon for a smooth shooting experience. The set includes a fire control group with a crisp 4.5-5.5 lbs pull for easier operation as well as critical components coated in a phosphate finish for superior corrosion and wear resistance.
The included enhanced bolt catch is completely redesigned with improved grip surfaces and angles to enhance performance when out in the field or on the range. For reliable parts that you can trust, rely on Strike Industries and their collection of enhanced lower parts packages perfect for any AR enthusiast searching for superior performance, exceptional function life, and lasting reliability no matter where you take your rifle.
16# KAK AR-15 Lower Parts Kit
Introducing the KAK AR-15 Lower Parts Kit, designed for serious rifle shooters and tactical professionals. This kit is made up of 100% USA parts, offering ultimate quality and performance. Each part is carefully developed to deliver precision accuracy and smooth operation every time you fire your weapon. The trigger group is mil-spec grade to provide reliable performance even under the most extreme conditions. Included in the kit is a black oxide finish on all springs for increased durability, providing extra protection against wear and tear.
The standard A2 handle ensures comfortable to use throughout your shooting training or competition. The KAK Billet Trigger Guard gives extra sustainment with improved ergonomics from its design which includes finger grooves and ridges. A common problem among other AR parts kits has been solved thanks to the rounded curves in the guard’s edges, which reduces snagging when reloading quicker than ever before.
17# Tactical Superiority AR-15 Lower Parts Kit
The Tactical Superiority AR-15 Lower Parts Kit is an essential tool for any serious shooter. Featuring mil-spec components with superior reliability, accuracy, and durability, this kit provides excellent performance and a competitive edge to your build. With everything you need to complete a lower receiver, this kit contains a brand new bolt catch, magazine catch, pivot pin and spring, safety selector, bolt catch spring, magazine catch button, and even a magazine catch spring. From fast reloads to enhanced accuracy on the range or in the field, these parts provide superior craftsmanship that sets your rifle apart from the rest.
18# Zro Delta – Ar-15 Lower Parts Kit
The Zro Delta Enhanced Ar-15 Lower Parts Kit provides superior performance and durability for all your AR-15 gunsmithing needs. Easily assemble the framework of your lower with an awesome phosphate coating to keep it functioning better than ever and protected against corrosion. This kit contains everything you need to build and maintain your AR-15 minus the Trigger Guard, Grip, and Fire Control Assemblies. Not only do you receive grade-A parts in every kit, but they are also preassembled making installation quick and easy!
The unique design features provide unrivalled reliability that is perfect for any competition or recreational shooter. With our Enhanced LPK, you can create or customize a smooth working accurate assault rifle without breaking the bank. Now you can enjoy shooting with confidence knowing the parts inside your AR-15 were designed for superior performance with elite standards of quality at an affordable price.
19# Alg Defense – Ar-15 Lower Parts Kit W/ Qms Trigger
The Alg Defense AR-15 Lower Parts Kit W/ QMS Trigger is an easy and cost-effective way to get all the components you need for your tactical rifle. This complete lower parts kit comes with everything you need to build out a lower receiver, including a Bolt Catch, Mag Release, Safety Detent, Takedown Pins, Buffer Retainer, Trigger Guard Roll Pin and more!
Crafted from high-grade materials for optimal longevity and reliability–a must-have for any gun enthusiast or collector. And now it includes the QMS Trigger – providing a smooth 4.5 lb pull weight without sacrificing crisp trigger feel and performance. With the option of adding a grip, this kit is perfect for use in competitions or just out on the range practising accuracy drills.
20# Sharps Bros – Ar-15 Lower Parts Kit With No Fire Control
Do you want a reliable and high-quality AR-15 lower parts kit that gives you complete control over your rifle build? Look no further than the Sharps Bros. AR-15 Lower Parts Kit, allowing you to choose all of the components that fit your needs, truly making it uniquely yours. This set contains 100% USA-made components, manufactured to our exacting standards.
By cutting out the fire control group and overseas production, you can be assured each part meets the highest level of quality at an excellent price. Use this kit for various parts such as bolt catch, selector detent, magazine catch assembly pins, takedown pin, pivot pin detents, buffer retainers and a full spring kit. Make sure each piece fits your mil-spec dimension lower receiver with complete confidence in the end result.
🛠️ Before you begin, it’s important to have all the necessary tools and items available. You’ll need a vice block, a pin punch set, a small hammer, pliers, and various Allen wrenches to complete installation. Also, make sure that you have all the components for your Lower Parts Kit readily available.
✅ Start by setting up your work area with the correct supplies. We recommend placing your receiver into a vice block for stability during installation. ⭕ If you don’t have one, you should be able to find one at most gun stores or online retailers.
✅ Now that your work area is set up correctly, begin installing each component from your Lower Parts Kit into its designated place on the lower receiver. Start by inserting the takedown pins into their respective places at either side of the receiver before moving on to other components such as triggers and safety selector switches. ⭕ Make sure to use proper force when pushing them in; using too much force may cause damage to pins or receivers themselves!
✅ The trigger guard will also need to be installed prior to proceeding with other components in order for it to fit correctly later on. To do this, press both sides of the guard through their respective holes located near the front portion of the receiver before tightening them down with Allen wrenches provided in your kit (or better yet – use an AR-15 armourer tool!).
✅ When everything else has been installed correctly and securely into place, move on to testing out the function and safety of all parts on your newly built lower receiver assembly! ⭕ Take time to check that each component works as expected – inspect triggers for smooth pulls, safeties for clean engagement/disengagement operations and pins/levers for proper tensioning when manipulating them manually using just hands or pliers if necessary!
✅ With everything tested out successfully, all that’s left is tightening down screws/nuts where applicable and applying some thread locker or oil on exposed threads if desired (not recommended). Congratulations – you now have a fully functional lower parts kit AR 15 installed on your rifle! ⭕ Enjoy it responsibly!
Watch this video to find more information 💻
Choosing the right lower parts kit is one of the most important decisions when building or upgrading an AR-15 rifle. While all kits contain the basic components, we’ve found the quality, features, and manufacturing can vary drastically.
Based on extensive testing and evaluations, we recommend focusing your search on kits offering enhanced triggers, American-made parts and corrosion-resistant coatings. The small upcharge over basic kits pays dividends in the long run through improved performance and reliability.
With the right tools and proper assembly, installing a lower parts kit is a straightforward process for most enthusiasts. Just be sure to follow the steps carefully and do not force any parts. A bit of patience during the build will reward you with a smoothly functioning rifle that will deliver many years of accurate shooting and trouble-free service.
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