AR-15, M4, AR-10, and M16 parts include components for maintaining, repairing, upgrading, and customizing popular modern sporting rifle platforms. This category includes replacement parts, internal components, controls, small parts, hardware, and accessories designed for compatible rifle builds and configurations. Whether you are servicing a current rifle, completing a build, or upgrading performance and ergonomics, choosing the correct platform-specific parts helps ensure proper fit and dependable function.
- AR-15 Lowers
- AR-15 Uppers
- AR-15 Triggers
- AR-15 Bolt Carrier Groups / BCG
- AR-15 Stocks
- AR-15 Grips
- AR-15 Buffer / Tubes
- AR-15 Bolt Catch
- AR -15 Magazine Catch
- AR-15 Charging Handles
- AR-15 Safety Selectors
- AR-15 Hand Stops
- AR-15 Forward Assist
- AR-15 Ejection Port Covers & Parts
- AR-15 Handguards & Rails
- AR-15 Barrels
- AR-15 Gas System Parts
- AR-15 Parts & Kits
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Products List
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BATTLEARMS WORKHORSE AR15/M4 Forged Upper Receiver — OD Green Anodize
Battle Arms Development$120.00Forged 7075-T6 upper receiver with MIL-A-8625F Type III OD Green hard anodize — service-grade strength, optics-ready, and built for repeatable alignment with Mil-Spec components. Key Features Forged from 7075-T6 aircraft-grade aluminum for proven... -
BATTLEARMS WORKHORSE Heavy-duty AR15/M4 Forged Upper Receiver
Battle Arms Development$120.00Heavy-duty forged AR15/M4 upper receiver — precision machined for reliable alignment, rugged service use, and full Mil-Spec compatibility. Key Features Forged from 7075-T6 aircraft-grade aluminum for proven strength and durability Precision... -
BATTLEARMS Workhorse Forged 7075-T6 Stripped Lower Receiver ODG Anodized for AR15
Battle Arms Development$131.00Workhorse Forged 7075-T6 Stripped Lower Receiver ODG Anodized for AR15 The Workhorse Forged 7075-T6 Stripped Lower Receiver in ODG anodized finish is built for AR15 builders who want a strong, dependable foundation for a custom rifle or pistol build... -
BATTLEARMS WORKHORSE Forged Mil-Spec AR Lower Receiver
Battle Arms Development$125.00Heavy-duty forged lower receiver — built for longevity, reliability, and Mil-Spec compatibility. Perfect for duty, range, and competition builds. Key Features Forged from 7075-T6 aircraft-grade aluminum for superior strength Mil-Spec... -
BATTLEARMS AUTHORITY ELITE AR15/M4 Lightweight 7075-T6 Billet Upper Receiver
Battle Arms Development$259.95Lightweight 7075-T6 billet AR15/M4 upper — precision machined, optics-ready, and built for durability and drop-in compatibility with Mil-Spec components. Key Features Forged & CNC machined from aerospace-grade 7075-T6 aluminum Lightweight,... -
BATTLEARMS XIPHOS Lightweight Billet 9mm PCC Upper Receiver Black
Battle Arms Development$259.95Battle Arms Development XIPHOS Lightweight Billet 9mm PCC Upper Receiver Black The Battle Arms Development XIPHOS Dedicated PCC Upper Receiver is built for 9mm AR-style pistol caliber carbine builds that need a lightweight, durable, and clean-looking... -
BATTLEARMS WORKHORSE AR15 FORGED RECEIVER SET
Battle Arms Development$245.00The WORKHORSE AR15 FORGED RECEIVER SET is a matched upper and lower forged from MIL-SPEC 7075-T6 aluminum for builders, armorers, and professionals who demand rock-solid strength and repeatable accuracy. Precision CNC machining ensures tight tolerances... -
BATTLEARMS WORKHORSE FORGED RECEIVER SET - ODG
Battle Arms Development$245.00The WORKHORSE Forged Receiver Set – ODG combines rugged reliability with precision machining and a distinctive Olive Drab Green anodized finish. Designed for serious shooters, builders, and professionals, this matched upper and lower set provides... -
BATTLEARMS WORKHORSE Complete Rifle Lower — with B5 Bravo Stock
Battle Arms Development$399.99Fully assembled and ready for your rifle upper, the WORKHORSE® Complete Rifle Lower ships with a B5 Bravo adjustable stock and enhanced controls for fast, reliable operation. Product: WORKHORSE® Complete Rifle Lower — with B5 Bravo... -
BATTLEARMS AR15/M16/M4 Buffer Retainer / Detent
Battle Arms Development$2.50The BATTLEARMS AR15/M16/M4 Buffer Retainer / Detent is a precision-machined small part designed to hold the buffer and spring securely in place within the receiver extension. Essential for proper AR-platform operation, this component ensures smooth... -
BATTLEARMS Development H3 Buffer / AR15 / M16
Battle Arms Development$119.95Battle Arms Development H3 Buffer Silver for AR15 / M16 The Battle Arms Development AR15BUFFERH3 H3 Buffer is a practical upgrade for shooters building or tuning an AR15 or M16 platform for smoother operation and more controlled cycling. Finished in... -
BATTLEARMS AR15/M16 Buffer – H2 Heavy Carbine / 4.65 OZ
Battle Arms Development$99.99Battle Arms AR15 H2 Buffer The AR15 H2 Buffer is a heavier-weight carbine buffer designed to help improve cycling, reduce felt recoil, and smooth out operation—especially in carbines that run over-gassed, suppressed setups, or short-barreled... -
BATTLEARMS 9MM Dedicated PCC Blowback Buffer – 7.2 oz (AR9)
Battle Arms Development$56.009MM Dedicated PCC Blowback Buffer – 7.2 oz (AR9) The Battle Arms Development 9MM Dedicated PCC Blowback Buffer (7.2 oz) is built specifically for 9mm AR / AR9 blowback platforms that require a heavier buffer to help control bolt speed, improve... -
BATTLEARMS VERT V2 PDW Buffer Assembly – 5.56/.300BLK AR15/M16/M4
Battle Arms Development$147.00Enhance your AR platform with the BATTLEARMS VERT V2 PDW Buffer Assembly, meticulously engineered for 5.56mm and .300 Blackout direct impingement systems. This ultra-compact buffer system is designed to optimize recoil management and ensure reliable... -
TROY AMBI SAFETY SELECTOR SEMI BLK
Troy$59.00The TROY AMBI SAFETY SELECTOR SEMI BLK is a rugged, ambidextrous safety selector built for AR-15 and AR-10 platforms in semi-automatic configurations. Featuring a sleek black finish and low-profile levers, this selector offers enhanced control and... -
SEEKINS SP SFTY SELECTOR KIT FDE
Seekins$59.00The SEEKINS SP SFTY SELECTOR KIT FDE is a high-performance ambidextrous safety selector designed for AR-15 and AR-10 rifles. Featuring a Flat Dark Earth anodized finish and modular lever options, it delivers both functionality and custom styling for... -
PHASE5 AMBI SAFETY SELECTOR RED
Phase 5 Weapon Systems$49.99The PHASE5 AMBI SAFETY SELECTOR RED is a high-performance, ambidextrous safety upgrade for AR-15 rifles, offering smooth operation, eye-catching red anodizing, and enhanced shooter control. Built for fast manipulation and visual distinction, it's ideal... -
TIMNEY 49'ER SAFETY SELECTOR BLK
Timney Triggers$80.99The TIMNEY 49'ER SAFETY SELECTOR BLK is a premium ambidextrous safety designed for AR-15 platforms, delivering fast, reliable, and low-profile control in a compact black anodized finish. Built by Timney Triggers, this selector offers smooth transitions... -
SEEKINS SP SFTY SELECTOR KIT BLK
Seekins$59.00The SEEKINS SP SFTY SELECTOR KIT BLK is a high-quality ambidextrous safety selector designed for AR-15 and AR-10 rifles. With its sleek black anodized finish and modular configuration, this kit provides reliable function, customizable throw angles, and... -
SEEKINS SP SFTY SELECTOR KIT RED
Seekins$59.00The SEEKINS SP SFTY SELECTOR KIT RED is a precision-engineered ambidextrous safety selector for AR-15 platforms, featuring a vibrant red anodized finish for high visibility and fast control. Designed by Seekins Precision, this kit offers smooth... -
LUTH AR AMBI SAFETY SELECTOR AR15
Luth-AR$27.25The LUTH AR AMBI SAFETY SELECTOR AR15 is a reliable, ambidextrous upgrade for your AR-15 rifle. Designed for smooth, consistent operation from either side of the firearm, this safety selector is ideal for both left- and right-handed shooters who demand... -
WILSON NARROW EXT THUMB SAFETY BL
Wilson Combat$32.95The WILSON NARROW EXT THUMB SAFETY BL is a high-quality extended thumb safety designed for 1911-style pistols. Crafted for shooters who prefer a slimmer profile, this black-finished safety provides precise control without adding unnecessary bulk to the... -
CMMG AMBI SAFETY SELECTOR AR15
CMMG$29.95The CMMG AMBI SAFETY SELECTOR AR15 is a rugged and reliable ambidextrous safety selector designed specifically for AR-15 platforms. Built for left- and right-handed shooters, it allows for fast and intuitive safety manipulation from either side of the... -
ELFTMANN AMBI SPEED SAFETY BLACK
Elftmann$37.95The ELFTMANN AMBI SPEED SAFETY BLACK is a premium ambidextrous safety selector designed for AR-15 and AR-10 rifles. Built for speed, control, and precision, it offers smooth actuation and a sleek black finish ideal for both tactical use and competition... -
CMMG LOW PRO GAS BLOCK .625 ID
CMMG$39.95CMMG Low Pro Gas Block .625" ID The CMMG Low Profile Gas Block .625" ID is the perfect solution for lightweight or pencil-profile AR-15 barrels requiring a slim, reliable gas system. Designed to sit under free-float handguards, this low-profile gas block... -
CMMG LOW PRO GAS BLOCK .750 ID
CMMG$39.95CMMG Low Pro Gas Block .750" ID The CMMG Low Profile Gas Block .750" ID is a precision-machined upgrade designed to deliver reliable gas flow and a streamlined profile for your AR-15. Compatible with standard barrel profiles, this gas block is the... -
CMMG LOW PRO GAS BLOCK .936 ID
CMMG$39.95CMMG Low Pro Gas Block .936" ID The CMMG Low Profile Gas Block .936" ID is the perfect match for heavy-profile AR barrels requiring a wider gas journal. Designed for performance and built to last, this gas block delivers secure gas system... -
FailZero AR10 BCG NO HAMMER BLK
FailZero$274.99FailZero AR10 BCG No Hammer – Black The FailZero AR10 BCG (No Hammer) in Black is a high-performance bolt carrier group designed for serious shooters and precision builders. Coated with FailZero’s advanced EXO Nickel Boron for superior... -
WMD NIB-X BCG WITHOUT HAMMER 308
WMD Guns$233.10WMD NiB-X BCG Without Hammer – .308 The WMD NiB-X Bolt Carrier Group for .308/AR10 (No Hammer) is a premium-grade BCG engineered for peak performance and long-lasting reliability. Featuring WMD’s proprietary NiB-X... -
SPIKE'S M16 BOLT CARRIER GROUP BLK
Spike's Tactical$134.96Spike’s Tactical M16 Bolt Carrier Group – Black The Spike’s Tactical M16 Bolt Carrier Group (BCG) is a top-tier upgrade trusted by military professionals, law enforcement, and civilian shooters alike. Coated in a durable black phosphate... -
LBE 308 BOLT CARRIER GROUP
LBE Unlimited$234.99LBE .308 Bolt Carrier Group The LBE .308 Bolt Carrier Group is a reliable, budget-friendly upgrade for your AR10 or LR-308 rifle. Built to perform in demanding conditions, this full-mass BCG delivers smooth cycling and consistent performance... -
CMC ENHANCED BCG 6MM ARC NTRD BLK
CMC$179.10CMC Enhanced BCG 6mm ARC Nitrided Black The CMC Enhanced BCG 6mm ARC Nitrided Black is a high-performance bolt carrier group engineered specifically for the 6mm ARC (Advanced Rifle Cartridge) chamber. Built for precision, durability, and... -
AERO AR15 6.5GREN BCG W/9310 BLK
Aero Precision / Aero Precision is temporarily unavailable - Company is currently restructuring$159.99Aero AR15 6.5 Grendel BCG with 9310 Black The Aero AR15 6.5 Grendel BCG with 9310 Black is a precision-engineered bolt carrier group designed specifically for the 6.5 Grendel cartridge. With its durable 9310 steel construction and black phosphate finish,... -
BATTLEARMS BAD 556 AR15 BCG TITANIUM ARMORTI
Battle Arms Development$395.00BAD 556 AR15 BCG Titanium Armorti The BAD 556 AR15 BCG Titanium Armorti is a lightweight, high-performance bolt carrier group designed for elite shooters seeking the best in durability, smooth cycling, and advanced material technology... -
LANTAC E-BCG 556 SIDE CHARGE NIB
Lantac$289.99Lantac E-BCG 5.56 Side Charge NiB The Lantac E-BCG 5.56 Side Charge NiB is a premium, high-performance bolt carrier group designed for AR-15 platforms. Featuring a Nickel Boron (NiB) coating and an innovative side charging feature, this BCG delivers... -
AERO AR15 5.56 PRO SERIES BCG NTRD
Aero Precision / Aero Precision is temporarily unavailable - Company is currently restructuring$174.99Aero AR15 5.56 Pro Series BCG Nitrided The Aero AR15 5.56 Pro Series BCG Nitrided is a high-performance bolt carrier group designed to deliver exceptional reliability, durability, and smooth cycling in your AR-15 platform. Coated with a nitrided finish... -
FailZero M16 BOLT CARRIER GROUP
FailZero$169.99FailZero M16 Bolt Carrier Group The FailZero M16 Bolt Carrier Group (BCG) is a premium, high-performance component designed for AR-15 and M16 rifles. With its advanced EXO coating, this BCG offers exceptional durability, smooth cycling, and... -
FailZero AR15 BOLT CARRIER GROUP
FailZero$169.99FailZero AR15 Bolt Carrier Group The FailZero AR15 Bolt Carrier Group (BCG) is a top-tier, high-performance upgrade designed to maximize the reliability, smooth cycling, and longevity of your AR-15 rifle. Featuring EXO coating for superior... -
FailZero 6MM ARC BCG NO HAMMER NIB
FailZero$189.99FailZero 6mm ARC BCG No Hammer – NiB The FailZero 6mm ARC Bolt Carrier Group without Hammer is a premium-grade component designed to deliver exceptional reliability and performance for rifles chambered in 6mm ARC. Coated with FailZero’s... -
WMD NIB-X BCG WITH HAMMER 556
WMD Guns$156.60WMD NiB-X BCG with Hammer – 5.56 The WMD NiB-X Bolt Carrier Group with Hammer is a premium, full-featured BCG designed for AR-15 rifles chambered in 5.56 NATO and .223 Remington. Featuring WMD’s exclusive NiB-X (Nickel Boron) coating, this...
