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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Mil-Spec Pistol Buffer Tube Assembly
$30.00 - $35.00Mil-Spec Pistol Buffer Tube Assembly Made in the USA 1.25" Outer Diameter Machined from 7075-T6 Aluminum End Plate Castle Nut Carbine Buffer Spring Carbine Buffer Available in Black Anodize and Cerakote Finishes$30.00 - $35.00 -
Mil-Spec Polymer Trigger Guard
$5.99 - $10.99Mil-Spec Polymer Trigger Guard With it's slim design, it offers coverage where it is needed serving its purpose: but yet not getting in the way when inquiring your target. Durable Polymer Construction Weight: 1.54oz Includes: Pin & Allen...$5.99 - $10.99 -
Mission First Tactical Engage AR Pistol Grip V2 - Black
$19.99Mission First Tactical AR Pistol Grip V2 - Black Black finish Version 2 No finger grooves 15 degree angle Tab covers the receiver gaps$19.99 -
Radian Talon Ambidextrous 45/90 Degree Safety Selector - Gray
$69.95Radian Talon Ambidextrous 45/90 Degree Safety Selector - Gray Designed & Manufactured in the USA 2-Lever Combo: Short + Long Levers Machined from Billet aircraft grade aluminum w Milspec Type 3 Hard Coat Anodized Finish or Cerakote Center Shaft...$69.95 -
Rise Armament AR-15 Magazine Release Button - Black Anodized
$9.99RISE AR-15 Magazine Release Button Sleek, ergonomic design Anti-slip horizontal grooves Simple installation Precision machined from 6061 aluminum$9.99 -
Rise Armament AR-15 Magazine Release Button - Graphite
$9.99Rise Armament AR-15 Magazine Release Button - Graphite Sleek, ergonomic design Anti-slip horizontal grooves Simple installation Precision machined from 6061 aluminum$9.99 -
Seekins Precision Safety Selector - Red
$59.00Seekins Precision Safety Selector - Red Ambidextrous 60 Degree Short Throw 90 Degree Standard Throw$59.00 -
Strike Industries AR-15 Modular Bolt Catch
$34.95Strike Industries AR-15 Modular Bolt Catch Modular design to easily change between different bolt catch deigns 4 different buttons included (Standard, Oversized, Left Extended and Right Extended) Compatible with Mil-Spec AR-15 lower receivers$34.95 -
STRIKE INDUSTRIES STRIKE SWITCH - BLUE
$76.95STRIKE INDUSTRIES STRIKE SWITCH - BLUE Package includes:- 2x Shaft Screw- 1x 60/90 Shaft- 1x End Cap- 1x Right Side Strike Switch- 1x Left Side Strike Switch Features- Ambidexterous- Ergonomic Shape- Modular Assembly- Precision Machined- Strike 60/90...$76.95 -
On Sale
Tactical Dynamics AK47 Skeleton Stock - Blue Titanium
Sale: $56.00MSRP: $99.00Tactical Dynamics Skeletonized Stock - Blue Titanium Finished in Blue Titanium Cerakote Works with StormWerks Ak folding adapter Compact 7.25" Weighs only 10 ouncesSale: $56.00MSRP: $99.00 -
On Sale
Tactical Dynamics AK47 Skeleton Stock - Tungsten Gray
Sale: $56.00MSRP: $99.00Tactical Dynamics Skeletonized Stock - Tungsten Gray Finished in Tungsten Gray Cerakote Works with StormWerks Ak folding adapter Compact 7.25" Weighs only 10 ouncesSale: $56.00MSRP: $99.00 -
Out of stock
TIMBER CREEK RECEIVER EXTENSION PLATE - BLACK
$69.99TIMBER CREEK RECEIVER EXTENSION PLATE - BLACK Made in the USA Machined from aircraft billet aluminum Drop in replacement stock Anodized Black finish$69.99 -
Out of stock
TIMBER CREEK RECEIVER EXTENSION PLATE - BURNT BRONZE
$69.99TIMBER CREEK RECEIVER EXTENSION PLATE - BURNT BRONZE Made in the USA Machined from aircraft billet aluminum Drop in replacement stock Burnt Bronze Cerakote finish$69.99 -
Out of stock
TIMBER CREEK RECEIVER EXTENSION PLATE - OD GREEN
$69.99TIMBER CREEK RECEIVER EXTENSION PLATE - OD GREEN Made in the USA Machined from aircraft billet aluminum Drop in replacement stock OD Green Cerakote finish$69.99 -
Out of stock
TIMBER CREEK RECEIVER EXTENSION PLATE - RED
$69.99TIMBER CREEK RECEIVER EXTENSION PLATE - RED Made in the USA Machined from aircraft billet aluminum Drop in replacement stock Anodized red finish$69.99 -
Ergo Grip Sure Grip Tactical Deluxe - Black
$39.99Ergo Grip Sure Grip Tactical Deluxe - Black Design allows installation on both .223 and .308 AR-15/AR-10 type receivers. Ergonomically correct finger grooves Integrated rear upper extension supports the web of your hand. Overmolded SUREGRIP®...$39.99 -
Strike Industries PDW Stock - Black
$274.95Strike Industries PDW Stock - Black Ambidextrous, push button deployment Ergonomic, compound curved stock Lightweight Compatible with standard bolt carriers No non-standard take down procedures Fits AR Rifles$274.95 -
F.A.B. Defense Gradus AR Pistol Grip - Black
$29.00F.A.B. Defense Gradus AR Pistol Grip - Black Ergonomic AR Grip$29.00 -
Out of stock
Rise Armaments Ar-15 Magazine Release Button - Spartan Bronze
$9.99Rise Armaments Ar-15 Magazine Release Button - Spartan Bronze Sleek, ergonomic design Anti-slip horizontal grooves Simple installation Precision machined from 6061 aluminum$9.99 -
Strike Industries Ambidextrous Safety Selector - Black
$65.95Strike Industries Strike Switch Safety Selector - Black Ambidextrous Ergonomic Shape Modular Assembly Precision Machined Strike 60/90 Option Compatible with AR-15 Style Lowers$65.95