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 VERT CSS Compact Stock System - Cheek Rest - Kydex Carbon Fiber Pattern
Battle Arms Development$25.00Replacement Kydex Cheek Rest for Vert CSS Stock -
BATTLEARMS VERT PDW Stock System - Cheek Rest - Kydex Carbon Fiber Pattern
Battle Arms Development$25.00Replacement Cheek Rest for VERT PDW Stock Monolithic Lower -
BATTLEARMS BAD-CSS/PDW Tailhook Adapter
Battle Arms Development$80.00VERT® Stock System Adapter to convert for use with GearHead Works Tailhook Mod 1 Does not include: Tailhook Mod 1 Screws Cheek Rest Adapter Only. Installation instructions. Remove two screws from stock piece, remove the buttstock... -
BATTLEARMS AR15/M16 Carbine Buffer Spring
Battle Arms Development$4.00The AR15/M16 Carbine Buffer Spring is a Mil-Spec replacement recoil spring designed for carbine-length receiver extensions. This essential component ensures proper cycling, smooth operation, and reliable performance in AR-platform rifles and carbines... -
BATTLEARMS Carbine Buffer Standard Weight 3.0 oz / AR15 / M16
Battle Arms Development$16.00Battle Arms Development Carbine Buffer Standard Weight 3.0 oz Silver for AR15 / M16 The Battle Arms Development AR15-BUFFER-C Carbine Buffer is a mil-spec standard-weight buffer built for AR15 and M16 carbines with a collapsible stock. Finished in silver... -
BATTLEARMS VERT Heavy Extra Power Buffer Spring - Upgraded Spring / AR-15 / AR9 / 300 BLK
Battle Arms Development$26.50Optimize your AR platform's performance with the Battle Arms VERT Heavy Extra Power Buffer Spring. Engineered for superior recoil control and reliable cycling, this upgraded spring is ideal for AR-15, AR9, and .300 BLK configurations, especially those... -
BATTLEARMS Development VERT V2 PDW Buffer Kit 9mm for AR9 PCC
Battle Arms Development$150.00The Battle Arms Development VERT V2 PDW Buffer Kit is a compact recoil system engineered specifically for dedicated 9mm AR-pattern pistol caliber carbines. Designed to provide reliable cycling and smooth operation in space-constrained PDW configurations,... -
BATTLEARMS SABERTUBE Quick Disconnect End Plate (AR15/M16/M4/AR9/AR10)
Battle Arms Development$34.99Battle Arms SABERTUBE Quick Disconnect End Plate (AR15/M16/M4/AR9/AR10) The Battle Arms Development SABERTUBE Quick Disconnect End Plate is a premium, purpose-built end plate designed to add a clean, secure sling attachment point to your rifle or pistol... -
BATTLEARMS Mil-Spec 6 Position Carbine Buffer Tube
Battle Arms Development$39.95Mil-Spec Receiver Extension / Buffer Tube, 6 Position Features: Mil-Spec Carbine Length Receiver Extension / Buffer Tube 6 Positions Precision CNC from 7075T6 Aircraft Grade Aluminum Impact Forging Mil-Spec Type III Hard Anodized Black Made in the... -
BATTLEARMS SABERTUBE Lightweight Pistol Length Buffer Tube Kit
Battle Arms Development$124.95SABERTUBE Lightweight Pistol Length Buffer Tube Kit – AR15 / M16 / M4 / AR9 The Battle Arms Development SABERTUBE® Lightweight Pistol Length Buffer Tube Kit is a compact, purpose-built receiver extension and QD end plate combo designed for AR... -
BATTLEARMS SABERTUBE Direct to Receiver Mid-Length Pistol
Battle Arms Development$99.99SABERTUBE® DIRECT TO RECEIVER PISTOL Receiver Extension Includes: (1) SABERTUBE® DIRECT TO RECEIVER *PISTOL* Receiver Extension/Buffer Tube COMPATIBLE WITH GEAR HEAD WORKS TAILHOOK MOD 1 with Stepped down OD (outside diameter) at end... -
BATTLEARMS Mil-Spec 6 Position Carbine Buffer Tube OD Green
Battle Arms Development$49.95Mil-Spec Receiver Extension / Buffer Tube, 6 Position Features: Mil-Spec Carbine Length Receiver Extension / Buffer Tube 6 Positions Precision CNC from 7075T6 Aircraft Grade Aluminum Impact Forging Anodized OD Green Color Made in the USA -
BATTLEARMS Mil-Spec AR15 LR308 Single Stage Trigger Kit
Battle Arms Development$45.95Single Stage Mil-Spec Trigger Includes Phosphate Mil-Spec Trigger Rounded Hammer Disconnector Trigger Spring Hammer Spring Disconnector Springs Trigger and Hammer Pins with a Black Oxide Finish -
BATTLEARMS EKG AK Trigger Kit
Battle Arms Development$39.95BAD-EKG... Powering the Kalashnikov heart within you. Features: Maximum compatibility with most standard production AK patterned firearms. Enhanced hammer geometry to eliminate that "hump" feel when charging the AK, to give you that smooth custom... -
BATTLEARMS Polished Nickel Teflon Enhanced Trigger Kit
Battle Arms Development$49.99nhanced Nickel Teflon trigger assembly features smooth,precision-machined engagement surfaces and Nickel Teflon coating that removes the grittiness found in mil-spec triggers and provides a cleaner "break”. This single-stage trigger is functionally... -
BATTLEARMS Adjustable Friction-less Trigger
Battle Arms Development$268.00Battle Arms Development Special Edition Trigger by Triggertech Repeatable User Adjustable Trigger Pull from ~2 to 5 lbs with click feedback indications Frictionless Release Technology (FRT)™ Zero Creep Short Two Stage... -
BATTLEARMS Enhanced Complete Lower Parts Kit
Battle Arms Development$135.00BAD-LPK-PKX Enhanced Complete Lower Parts Kit Consisting of the following: BAD-EBC-IC Enhanced Bolt Catch Cost friendly alternative Lightweight but Robust Design 0.39oz Compatible with Norgon Ambi-Catch Without Interference Raised "T-Shaped" Heel... -
BATTLEARMS 3 Piece Enhanced Lower Parts Kit
Battle Arms Development$35.00BAD-LPK-PK3 3 Piece Enhanced Lower Parts Kit Consisting of the following: Enhanced Bolt Catch (BAD-EBC-IC), which is a cost-friendly alternative, without sacrificing the quality for your AR build! The AR-15 Cast Enhanced Bolt Catch is 8620 heat... -
BATTLE ARMS BAD-QRRTP - Quick Release Rear Takedown Pin
Battle Arms Development$30.00BAD-QRRTP Quick Release Rear Takedown Pin Features: Dual Function Easy Pull Head CNC Machined Comes with Detent and Spring Made in the USA! Patent US10101107B1 -
BATTLEARMS BAD-EPS-308 (Enhanced Pin Set) LR-308/SR-25/AR308
Battle Arms Development$29.95BATTLEARMS – BAD-EPS Enhanced Takedown & Pivot Pin Set (AR15/M16/M4/AR9) Item: BAD-EPS SKU: BAD-EPS UPC: 810033780394 Platform Compatibility: AR15 / M16 / M4 / AR9 The BATTLEARMS BAD-EPS® Enhanced Takedown and Pivot Pin Set upgrades one... -
BATTLEARMS AR15/M16 Takedown & Pivot Pin Detent Spring – AR15 Mil-Spec Replacement Part
Battle Arms Development$0.75Replace worn or lost detent springs in your AR15 or M16 rifle with this high-quality Mil-Spec spring from Battle Arms Development. Precision-engineered for reliability and durability, it’s perfect for custom builds, repairs, or routine maintenance... -
BATTLEARMS BAD-EPS FDE Aluminum Enhanced Takedown and Pivot Pin Set
Battle Arms Development$29.95Battle Arms Development Enhanced Pin Set (BAD-EPS) for the AR15 / M16 / M4 style rifles. The BAD-EPS features the following improvements and features: Precision Swiss CNC machined. AR15 / M16 / M4 Compatible - Fits all AR15/M16/M4 lower receivers with... -
BATTLEARMS Green Aluminum Enhanced Takedown / Pivot Pin Set
Battle Arms Development$29.95Battle Arms Development Enhanced Pin Set (BAD-EPS) for the AR15 / M16 / M4 style rifles. The BAD-EPS features the following improvements and features: Precision Swiss CNC machined. AR15 / M16 / M4 Compatible - Fits all AR15/M16/M4 lower receivers with... -
BATTLEARMS BAD-EPS Purple Aluminum Enhanced Takedown and Pivot Pin Set
Battle Arms Development$29.95Battle Arms Development Enhanced Pin Set (BAD-EPS) for the AR15 / M16 / M4 style rifles. The BAD-EPS features the following improvements and features: Precision Swiss CNC machined. AR15 / M16 / M4 Compatible - Fits all AR15/M16/M4 lower... -
BATTLEARMS BAD-EPS Blue Aluminum Enhanced Takedown and Pivot Pin Set
Battle Arms Development$29.95Battle Arms Development Enhanced Pin Set (BAD-EPS) for the AR15 / M16 / M4 style rifles. The BAD-EPS features the following improvements and features: Precision Swiss CNC machined. AR15 / M16 / M4 Compatible - Fits all AR15/M16/M4 lower... -
BATTLEARMS BATTLE ARMS BAD-EPS Enhanced Takedown and Pivot Pin Set AR15
Battle Arms Development$29.00Battle Arms Development Enhanced Pin Set (BAD-EPS) for the AR15 / M16 / M4 style rifles. The set consists of the Enhanced Take-down Pin (BAD-ETP) and Enhanced Pivot Pin (BAD-EPP). Precision Swiss CNC machined from round stock steel bars,... -
BATTLEARMS Cast 308 BAD-EBC Enhanced Bolt Catch LR308
Battle Arms Development$9.00BAD-EMC-IC Enhanced Magazine Catch Process: Investment Cast (Same Process as Mil-Spec) Material: 8620 Heat Treated Steel Finish: Black Phosphate Finish Construction: One Piece Engineering (Not Two-Piece) Design: Lightweight Fluted... -
BATTLEARMS Cast 308 BAD-EBC Enhanced Bolt Catch LR308
Battle Arms Development$19.95The Battle Arms Development EBC® (enhanced bolt catch) was designed to be a drop-in upgrade to the existing MIL-SPEC bolt catch. Due to the design of this bolt catch, it provides not only a better purchase on the release portion but the lock... -
BATTLEARMS Billet BAD-EBC Enhanced Bolt Catch AR15
Battle Arms Development$42.00The Battle arms development EBC (enhanced bolt catch) was designed to be a drop-in upgrade to the existing MIL-SPEC bolt catch. Due to the design of this bolt catch, it provides not only a better purchase on the release portion but the lock portion of... -
BATTLEARMS BAD-EBC-IC Enhanced Bolt Catch – AR15 / M16 / M4
Battle Arms Development$17.00BATTLEARMS BAD-EBC-IC Enhanced Bolt Catch – AR15 / M16 / M4 Manufacturer: Battle Arms Development, Inc.Item: BAD-EBC-ICSKU: BAD-EBC-ICUPC: 810033781230 Precision Control. Faster Manipulation. Proven Durability. The BATTLEARMS BAD-EBC-IC Enhanced... -
PRO Safety Replacement Lever - Standard
Battle Arms Development$9.99Qty of 1. BAD-ASS-PRO Replacement Standard Long Lever Compatible with BAD-ASS-PRO family of safeties. BAD-ASS-PRO BAD-ASS-PRO-1522 BAD-ASS-PRO-FA BAD-ASS-PRO-LITE BAD-ASS-PRO-NITE -
BATTLEARMS PRO Safety Replacement Lever - Short
Battle Arms Development$9.99Qty of 1. BAD-ASS-PRO Replacement Short Lever Compatible with BAD-ASS-PRO family of safeties. BAD-ASS-PRO BAD-ASS-PRO-1522 BAD-ASS-PRO-FA BAD-ASS-PRO-LITE BAD-ASS-PRO-NITE -
BATTLEARMS AR15/M16 Ejector / Safety Selector Detent Spring
Battle Arms Development$0.50This quality, high tensile strength spring tensions the Ejector for proper functioning in the Bolt. Its good to replace it any time you disassemble the Ejector parts. -
BATTLEARMS Replacement Pro Series Safety Screw 8-32x1/4
Battle Arms Development$0.30Replacement Screw for BAD-ASS-PRO series of safeties. Not required when purchasing a BAD-ASS-PRO kit. One screw included. -
BATTLEARMS Stainless Steel Safety Detent
Battle Arms Development$1.90AR15/M16 Safety Selector Detent - Heat Treated Stainless Steel Note: (1) One Detent Black Nitride Coated Made in the USA -
BATTLEARMS PRO Series Safety Installation Wrench 5/64 0.0 / 5
Battle Arms Development$0.25Short Arm Hex Key, for BAD-ASS-PRO series of safeties. Included with BAD-ASS-PRO kits. One wrench. -
BATTLEARMS BAD-ASS Elite Ambidextrous Safety Selector
Battle Arms Development$80.00BATTLEARMS BAD-ASS-ELITE Fiber Optic-Ready Lightweight Ambidextrous Safety Selector (AR15 / M16 / M4 / AR9 / AR10) The BAD-ASS-ELITE is a professional-grade, lightweight, ambidextrous semi-auto safety selector designed to improve reliability,... -
BATTLEARMS BAD-ASS-LITE Lightweight Ambidextrous 60/90 Safety Selector – Blue
Battle Arms Development$65.00Battle Arms Development BAD-ASS-LITE Lightweight Ambidextrous 60/90 Safety Selector – Blue (AR15/M16/M4/AR9/AR10) Manufacturer: Battle Arms Development, Inc. Item: BAD-ASS-LITE-BLUE SKU: BAD-ASS-LITE-BLUE UPC: 810033785696 Color: Blue Platform:... -
BATTLEARMS BAD-ASS-NITE Tritium Ambidextrous Safety Selector
Battle Arms Development$149.00BATTLEARMS BAD-ASS-NITE | AR15 Ambidextrous Speed Safety Selector (Aluminum / Tritium) Tritium-illuminated ambidextrous safety selector for fast, confident indexing in low-light conditions. SKU: BAD-ASS-NITE UPC: 810033782558 Overview The Battle... -
BATTLEARMS BAD-ASS-LITE Lightweight Ambidextrous Safety Selector – Red Anodized | AR15/M4/M16/AR10
Battle Arms Development$65.00Battle Arms Development, Inc. – BAD-ASS-LITE Lightweight Ambidextrous 60/90 Safety Selector (Red) Item: BAD-ASS-LITE-RED SKU: BAD-ASS-LITE-RED Model: BAD-ASS LITE UPC: 810033785689 Platform Compatibility: AR15 / M16 / M4 / AR9 / AR10 The best...
