AR-15 Parts
LPKs • Triggers • BCGs • Stocks & Rails
Build, repair, and upgrade America’s rifle with nearly 100 components spanning every class on the AR-15 — lower parts kits, triggers and fire-control, bolt carrier groups, barrels, stocks, grips and buffers, handguards and rails, muzzle devices, gas-system parts, sights, and every small pin and spring. Genuine mil-spec and premium parts from Magpul, CMMG, Aim Sports, FAB Defense, Hogue and UTG. Need feeding? AR-15 magazines now have their own category.
AR-15 Parts at Keep Shooting
The AR-15 is the most modular rifle ever built, and Keep Shooting stocks nearly 100 components to build, repair, and upgrade yours — from complete lower parts kits and drop-in triggers to every pin, spring, and detent. It’s a core part of our gun parts department. Looking to feed it? AR-15 magazines now have their own dedicated category.
Lower Parts Kits, Triggers & Fire Control
Start a build or finish a stripped lower with the AR-15 Lower Parts Kit or the CMMG Gun Builder’s LPK. For the trigger, choose a standard AR-15 trigger, the Sharp Shooter Enhanced Duty Trigger, or the binary-style Fostech Echo AR II. We also carry genuine M16 fire-control parts (hammer, trigger, selector, disconnector) for registered full-auto builds.
Bolt Carrier Groups, Barrels & Small Parts
For the upper, the Angstadt Arms 9mm BCG runs pistol-caliber builds, and Ballistic Advantage barrels like the 5.56 Hanson 16″ and Modern M4 barrel anchor the front end. Keep wear items on the bench too — the extractor, firing pin, bolt catch, and the enhanced pivot & takedown pin set.
Stocks, Grips & Buffer Systems
Dial in ergonomics with the Magpul MOE carbine stock, the FAB Defense GL-Core S buttstock, or a Hogue OverMolded stock and grip kit. Aim Sports adds budget GI-style and modular stocks, and the LBE complete M4 6-position stock kit bundles the buffer tube and hardware. Finish the grip with an ergonomic pistol grip.
Handguards, Rails, Muzzle Devices & Gas System
Free up real estate with the UTG PRO drop-in quad rail or the Aim Sports M4 quad rail. At the muzzle, run the classic A2 flash hider or step up to the HiperComp 556C compensator — just add a crush washer. Tune the gas system with a carbine-length gas tube and a low-profile gas block.
Sights, Tools & Magazine Accessories
Top it off with iron sights — the detachable carry handle, a UTG flip-up rear sight, or the M16 flip-up front sight. Keep the bench stocked with the front sight tool, lower receiver vice block, and our gunsmith tools. And while magazines have moved, their accessories stay here: the Battle Arms Development enhanced magazine release and the Maglula AR-15 loader/unloader.
Whether you’re assembling a first build or keeping a duty rifle running, every part ships from our Pennsylvania warehouse with free shipping on orders over $49.95. Round out your rifle with AR-15 magazines, optics, and rifle accessories, grab a complete rifle, or explore sibling parts for the Glock and 1911 platforms.
Frequently Asked Questions — AR Parts
Keep Shooting carries a wide selection of AR Parts products from trusted brands. Browse our catalog to see the full range, and use the filters on the left to narrow by brand, price, or product type.
Yes! All orders over $49.95 qualify for free shipping, including AR Parts products. Orders typically ship within 1–2 business days.
Keep Shooting offers hassle-free returns on AR Parts products. If you're not completely satisfied, contact our customer service team for a return authorization. All products must be in original, unused condition.
If you need help choosing the right AR Parts product, our team is available to assist. Check individual product descriptions for detailed specifications, or contact us directly and we'll help you find the best fit for your needs.