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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Out of stock
Radian Weapons AR15 Ambidextrous Talon Safety Selector 4-Lever Kit Tungsten Grey
$87.45AR15 Ambidextrous Talon Safety Selector 4-Lever Kit Tungsten Grey 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...$87.45 -
Rise Armament RAVE-PCC Trigger
$159.99Rise Armament RAVE-PCC Trigger Black Nitride Finish Includes Anti-Walk Pins Durable Construction 3.5 lb trigger pull Designed for use in 9MM AR configurations$159.99 -
Seekins Precision Builder's Kit Lower Parts Kit
$149.00Seekins Precision Builder's Kit Lower Parts Kit Seekins Precision Parts No Trigger Included Ar-15 LPK Trigger Guard Mag Release Bolt Catch Ambi Safety Take Down Pins Pins Detents and Springs$149.00 -
Out of stock
SKELETON GRIP AND TRIGGER GUARD COMBO - BURNT BRONZE
$94.99Tactical Dynamics Skeleton Grip - Burnt Bronze Finished in Burnt Bronze Cerakote Machined from 7075-T6 Aluminum Durable and Lightweight Compatible with AR15/AR10 Platforms Unique Design Made in the USA VITAL AR 15 TRIGGER GUARD - BURNT...$94.99 -
Strike Industries Advanced Receiver Extension - Blue
$52.95Strike Industries Advanced Receiver Extension - Blue 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...$52.95 -
Strike Industries AR Flip Switch - Black
$41.95Strike Industries AR Flip Switch - Black Package includes:- 2x Shaft Screw- 1x 60/90 Shaft- 1x End Cap- 1x Right Side Flip Switch- 1x Left Side Flip Switch Features- Ambidexterous- Ergonomic Shape- Modular Assembly- Strike 60/90 Option Note: Not...$41.95 -
Strike Industries Modular Magazine Catch - Black
$35.95Strike Industries Modular Magazine Catch - Black Modular design for quick and simple magazine button replacement Textured for positive feel and manipulation Magazine buttons made from durable and lightweight polymer The Strike Industries AR...$35.95 -
On Sale
Sylvan Arms AR15 QD Backplate
Sale: $26.99MSRP: $29.99Sylvan Arms AR15 QD Backplate Machined from billet 7075 Aluminum Replacement for Standard AR-15 End Plate Three QD Sling Swivel Sockets Ambidextrous Attachment Points BlackSale: $26.99MSRP: $29.99 -
Sylvan Arms Folding Stock Adapter Gen 4 - Left Hand
$199.99Sylvan Arms Folding Stock Adapter Gen 4 - Left Hand Compatible with most AR15 Standard 1-3/16" x 16 thread Lightweight and Corrosion-Resistant Left folding$199.99 -
TIMBER CREEK AR MAGAZINE RELEASE BUTTON - ORANGE
$7.99AR MAGAZINE RELEASE BUTTON - ORANGE Anodized orange finish Compatible with all Milspec lowers Manufactured in the USA Lightweight billet aluminum$7.99 -
Out of stock
TIMBER CREEK ENFORCER AR PISTOL GRIP - ORANGE
$99.99TIMBER CREEK ENFORCER AR PISTOL GRIP - ORANGE Made in USA Orange Anodized finish CNC machined from aircraft grade billet aluminum Manufactured by Timber Creek Outdoors Inc.$99.99 -
TIMBER CREEK RECEIVER EXTENSION PLATE - ORANGE
$69.99TIMBER CREEK RECEIVER EXTENSION PLATE - ORANGE Made in the USA Machined from aircraft billet aluminum Drop in replacement stock Anodized orange finish$69.99 -
Out of stock
2A Armament AR-10 Takedown Pin Set - Titanium
$39.982A Armament AR-10 Takedown Pin Set - Titanium .278 Pin Size Through Drilled for Weight Reduction 6AL-4V Titanium$39.98 -
2A Armaments Builder Series Solid Trigger Guard
$14.992A Armaments Builder Series Solid Trigger Guard Precise Manufacturing Long Term Reliability Durable Construction Black Anodized Finish For Ar-15 Rifles$14.99 -
ALG DEFENSE COMBAT TRIGGER - NICKEL BORON
$79.00ALG DEFENSE COMBAT TRIGGER Single Stage Stock Trigger Reliability Wear Resistant Nickel Boron Plated 6 Pound Pull$79.00 -
Out of stock
AR Ambi Dual Lever Safety Selector - Black
$14.99AR Ambi Dual Lever Safety Selector - Black Mil-Spec High Carbon Steel construction Anti-reflective matte Black finish Ambidextrous Fits: AR-15$14.99 -
Out of stockOn Sale
AR-15 80% Lower With Fire/Safe Engravings | SBA3 | Mil-Spec LPK | Carbine Buffer Tube Kit
Sale: $189.99MSRP: $379.94AR-15 80% Lower With Fire/Safe Engravings | SBA3 Pistol Brace | Mil-Spec LPK | Carbine Buffer Tube Kit This AR-15 80% Lower Build Kit provides a solid foundation for your next custom rifle. Featuring an 80% lower receiver with Fire/Safe engravings, an...Sale: $189.99MSRP: $379.94 -
AR-15 Extended Bolt Catch Lever
$19.99AR-15 Extended Bolt Catch Lever CNC Machined Aluminum Compatible for Left/Right Hand Attatches to AR-15 Bolt Catch Finished in Hard Coat Black Anodize$19.99 -
ATI Outdoors AR-15 X1 Pistol Grip - Black
$29.99ATI Outdoors AR-15 X1 Pistol Grip - Black Fits AR-15/AR-10 Fits the Ruger 22 Charger Pistol with AR-15 Style Grip DuPont(R) Extreme Temperature Glass Reinforced Polymer Scratch & weatherproof$29.99 -
B5 Systems Mil-Spec Stock - FDE
$62.00B5 Systems Mil-Spec Stock - FDE Ergonomic cheek weld. Color-matched steel hardware. Overmolded steel anti-rotational QD sling mounts. Fixed sling mounts Internal tensioners. No slip cushioned butt pad. Suregrip stock latch. Made of Milspec...$62.00