Lower Parts
Looking to get new parts for your AR's lower receiver. This is the place to look, with hundreds of parts from stocks and grips to a new mag release button. Shop with Grid Defense to customize and build the best lower receiver you can. Make your firearm look, feel, and perform the best with our selection of OE and aftermarket parts.
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B5 Systems Trigger Guard - FDE
$22.00B5 Systems Trigger Guard - FDE Made of 6061 aluminum. Milspec Type III anodized finish. Weight: 3.00 oz.$22.00 -
F.A.B. Defense GCCP AR-15 Buttstock - Black
$88.00F.A.B. Defense GCCP AR-15 Buttstock - Black Collapsible Rubber Buttpad Cheek Riser Small Compact Design Fits Mil-Spec and Commercial Tubes$88.00 -
Out of stock
MAGPUL MOE CARBINE STOCK MIL-SPEC PINK
$39.95MAGPUL MOE CARBINE STOCK MIL-SPEC PINK Sloping cheek weld combines a slim profile with user comfort Shielded release latch prevents snagging and accidental operation Premium chrome-silicon lock spring provides positive locking and long service life Side...$39.95 -
Odin Works XMR2 Extended Mag Release - Gen 2
$22.00Odin Works XMR2 Extended Mag Release - Gen 2 Compatible with BAD Lever. Will not work with anti-walk pins without modification to the XMR2 .1 oz (including paddle, button, and screws) Large surface area for quick magazine reloads Easy to...$22.00 -
RADIAN WEAPONS AR15 AMBIDEXTROUS TALON SAFETY SELECTOR 4-LEVER KIT - NP3
$102.45AR15 AMBIDEXTROUS TALON SAFETY SELECTOR 4-LEVER KIT - NP3 The Talon™ ambidextrous safety selector is a modular design that can be installed as a standard 90° or as a 45° short throw by simply rotating the shaft 180° inside the lower...$102.45 -
SPIKE'S ST-T1 TUNGSTEN HEAVY BUFFER
$32.95ST-T1 TUNGSTEN Spikes Heavy Buffer Material: Solid Aluminum Billet Finish: Black Anodized Features: Crushed Tungsten, Mil-Spec...$32.95 -
Strike Industries Advanced Receiver Extension - Black
$52.95Strike Industries Advanced Receiver Extension - Black 7075-T6 Aluminum Supported buffer retaining tab$52.95 -
Strike Industries Advanced Receiver Extension - Red
$52.95Strike Industries Advanced Receiver Extension - Red The Strike Industries Advanced Receiver extension brings an updated aesthetic and increased functionality to an often neglected, yet highly important component of the AR15/AR10 weapon system. The...$52.95 -
Strike Industries AR-15 Lower Parts Kit No Fire Control Group
$60.95Strike Industries AR-15 Lower Parts Kit No Fire Control Group Enhanced Bolt Catch Strike Magazine Catch Enhanced Takedown Pin SI 60-90 Degree 3-in-1 Selector Shaft$60.95 -
Out of stock
TIMBER CREEK AR MAGAZINE RELEASE BUTTON - BLUE
$7.99AR MAGAZINE RELEASE BUTTON - BLUE Billet 6061-T6 aluminum Compatible with all Milspec lowers Manufactured by Timber Creek Outdoors Made in the USA Blue Anodized Finish$7.99 -
Out of stock
TIMBER CREEK AR MAGAZINE RELEASE BUTTON - BURNT BRONZE
$7.99AR MAGAZINE RELEASE BUTTON - BURNT BRONZE Made in the USA Timber Creek Outdoor Inc., Manufactured Compatible with milspec lower receivers Lightweight billet aluminum Burnt Bronze Cerakote Finish$7.99 -
Out of stock
TIMBER CREEK AR MAGAZINE RELEASE BUTTON - RED
$7.99AR MAGAZINE RELEASE BUTTON - RED Made in the USA Lightweight aluminum Billet magazine release button Manufactured by Timber Creek Outdoors Red Anodized Finish$7.99 -
Out of stock
TIMBER CREEK AR TAKEDOWN PIN SET - RED
$19.99AR TAKEDOWN PIN SET - RED Machined from billet aluminum Anodized finish Compatible with M4/AR15 lower receivers Made in the USA These CNC machined pins are drop in replacements for Mil-Spec lowers and allow easier disassembly of your...$19.99 -
Out of stock
AR Competition Drop-In Trigger System - 3.5LB
$99.99AR Competition Drop-In Trigger System - 3.5LB Single Stage Drop-In Trigger System Pull weight of 3.5 lb Trigger Group constructed of Heat Treated Tool Steel 6061 Billet Aluminum Housing Semi-Flat Trigger Bow Fits: AR-15/AR-10 Black...$99.99 -
Armaspec AR-15 Stainless Steel Takedown/Pivot Pins
$15.99Armaspec AR-15 Stainless Steel Takedown/Pivot Pins Includes Takedown and Pivot pins that work with an AR15, M16 or M4 Ultra-Lightweight Built-in Dimples for easy pushing in Bullet tip and EZ-set hole for detent installation Made with...$15.99 -
Armaspec Stealth Spring - Big Bore
$84.99Armaspec Stealth Spring - Big Bore Drop-in replacement for standard buffer and spring. Reduce felt recoil. Keep the buffer spring from rubbing against the inner wall of the buffer tube. Buffer mass is designed to stay under constant tension against...$84.99 -
ATI Outdoors AR-15 X2 Pistol Grip - Black
$29.99ATI Outdoors AR-15 X2 Pistol Grip - Black Fits most AR-15 and AR-10's V2 Sure Grip Texture Specifically Engineered Grip Dimensions Rear Tang & Curved Base Scratchproof & Weatherproof$29.99 -
B5 Systems AR-15 Pistol Grip - Black
$20.00B5 Systems AR-15 Pistol Grip - Black Aggressive texture for increased retention. Accepts Battery Grip Plug. Made of Milspec material. Available in all standard colors.$20.00 -
B5 Systems Medium Length Collapsible Precision Stock - FDE
$230.00B5 Systems Medium Length Collapsible Precision Stock - FDE Adjustable cheekweld and buttpad with precision dials. Mounting slots for Accessory Cheekpiece. 12 internal tensioners. Color matched machined hardware. Fixed sling mounts. Steel...$230.00 -
On Sale
Battle Arms Development Enhanced Safety Selector
Sale: $14.40MSRP: $16.00Battle Arms Development Enhanced Safety Selector AR15 Style Rifles and the ArmaLite,Inc.'s AR10® (Semi Auto). Single Side Safety Selector (0°-90° SEMI AUTO) Fit all Mil-Spec Dimensioned AR-15 Lower Receiver Black Phosphate...Sale: $14.40MSRP: $16.00