AR-15 parts kits are used to provide grouped components for building, repairing, maintaining, or upgrading compatible AR-15 rifles. They can include lower parts, upper parts, springs, pins, detents, controls, and other small components that help complete a rifle setup or support replacement work. Different kits can vary in included parts and intended use depending on the build or repair project. This category includes AR-15 parts kits built for proper fit, dependable function, and practical everyday performance.
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BATTLEARMS BAD-EPS-Ti Enhanced Pin Set (Titanium – Black DLC) | AR15/M16/M4/AR9
Battle Arms Development$54.95BAD-EPS-Ti Enhanced Pin Set (Titanium – Black DLC) | AR15/M16/M4/AR9 Item: BAD-EPS-TI_BLACK_DLC_-_BLACK SKU: BAD-EPS-TI UPC: 810033780417 The Battle Arms Development BAD-EPS-Ti Enhanced Pin Set (Black DLC) is a premium takedown and pivot pin... -
BATTLEARMS BAD-EPS-TI Enhanced Titanium Pin Set | AR15/M16/M4/AR9
Battle Arms Development$49.95BAD-EPS-TI Enhanced Pin Set (Titanium – Clear / Natural Finish) | AR15/M16/M4/AR9 Item: BAD-EPS-TI SKU: BAD-EPS-TI UPC: 810033780400 Platform Compatibility: AR15 / M16 / M4 / AR9 Material: Grade 5 Titanium (Precision CNC Machined) Finish: Natural... -
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 BAD INC T10 Screws 4-40 x 5/16 Selector Screw
Battle Arms Development$3.00Battle Arms Development, Inc. (BAD INC) 4-40 x 5/16" 6-Lobe T-10 Flat Head Cap Screw MS 4037 Alloy Steel Black Oxide 2-Pack Made in USA The Battle Arms Development 4-40 x 5/16" 6-Lobe T-10 Flat Head Cap Screw is a compact replacement or upgrade hardware... -
BATTLEARMS BAD-ASS - Semi Auto 90° - Replacement Center and Screws
Battle Arms Development$25.95BAD-ASS-CENTER 90 DEGREE Center and 2 Screws ONLY Levers NOT included -
BATTLEARMS AR15/M16 Buffer Retainer/Detent
Battle Arms Development$2.50AR15/M16 Mil-Spec Buffer Retainer/Detent -
BATTLEARMS AR15/M16 Buffer Retainer Spring
Battle Arms Development$1.00AR15/M16 Mil-Spec Buffer Retainer Spring -
BATTLEARMS Socket Head Cap Screw | 1-72 x 1/8" | EMMR-SCREW
Battle Arms Development$3.25Socket Head Cap Screw (Black-Oxide Alloy Steel) | 1-72 x 1/8" | EMMR-SCREW Item: EMMR-SCREW SKU: EMMR-Screw UPC: 91864A006 Material/Finish: Black-Oxide Alloy Steel Type: Socket Head Cap Screw Thread Size: 1-72 Length: 1/8" Quantity: 1 Screw This... -
BATTLEARMS Takedown Spring Retainer Screw
Battle Arms Development$0.754-48 x 1/8in Cup Point Set Screw .050in Allen -
BATTLEARMS Mil-Spec ARMil-Spec AR15/LR308 T15/LR308 Trigger Disconnector Spring - Semi Auto
Battle Arms Development$1.99Ensure your AR-15 or LR-308 rifle operates reliably with our Mil-Spec Trigger Disconnector Spring designed specifically for semi-automatic platforms. Manufactured to strict military specifications, this trigger disconnector spring guarantees consistent... -
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BATTLEARMS Mil-Spec Trigger Spring for AR-15 and LR-308 Rifles
Battle Arms Development$1.79Upgrade or restore your AR-15 or LR-308 rifle with our reliable Mil-Spec Trigger Spring. Precision-crafted to military standards, this high-quality trigger spring ensures consistent and dependable trigger performance in your firearm. Made from durable... -
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BATTLEARMS AR15/M4 Takedown and Pivot Pin Detent – Precision Fit for Secure Pin Retention
Battle Arms Development$1.00The AR15/M4 Takedown and Pivot Pin Detent is a vital small part that plays a big role in the function of your rifle. This precision-machined detent retains the front and rear takedown pins securely in place, ensuring your upper and lower receivers stay... -
BATTLEARMS AR15/M16 Magazine Catch Spring
Battle Arms Development$3.00AR15/M16 Mil-Spec Magazine Catch Spring -
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... -
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,... -
AR10/LR308 - Ejection Port Cover Pin
Battle Arms Development$3.50The machined steel Ejection Port Cover Rod is the hinge pin that keeps the Ejection Port Cover in place. Unlike the AR15 version, it needs no c-clip. -
AR15/M16 - Ejection Port C-Clip
Battle Arms Development$1.00AR15/M16 - Ejection Port C Clip These high quality components will provide excellent fit and reliable function in your AR series rifle and are perfect for upgrading existing components or replacing worn or broken parts. -
AR15/M16 - Ejection Port Cover Spring
Battle Arms Development$1.00AR15/M16 - Ejection Port Cover Spring These high quality components will provide excellent fit and reliable function in your AR series rifle and are perfect for upgrading existing components or replacing worn or broken parts.
