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 - Black
$20.00B5 Systems Trigger Guard - Black Made of 6061 aluminum. Milspec Type III anodized finish. Weight: 3.00 oz.$20.00 -
Battle Arms Development Enhanced .308 Bolt Catch
$17.00Battle Arms Development Enhanced .308 Bolt Catch Weight 0.53oz Compatible with Norgon Ambi-Catch Without Interference Raised "T-Shaped" Heel Provides Positive and Distinctive Control Surface for Bolt Lock Back Bold Horizontal and Diagonal...$17.00 -
BRAVO COMPANY GUNFIGHTER GRIP MOD 0 - FDE
$30.00BRAVO COMPANY BCMGUNFIGHTER GRIP MOD 0 - FDE Fits AR rifles Reduced angle for improved ergonomics Hinged trap door offering storage inside the grip Test fit to ensure proper function$30.00 -
F.A.B. Defense MOJO AR-15 Magwell Grip - Black
$57.00F.A.B. Defense MOJO AR-15 Magwell Grip - Black Replaceable grip area (Comes standard with the Tactical grip and one Mask grip) Easy installation Durable and lightweight$57.00 -
Out of stock
Fortis Magazine Release Button AR15/AR10 - Blue
$7.95Fortis Magazine Release Button AR15/AR10 - BLUE Description: The Fortis Billet Mag Button is a superior alternative to the ones found in a mil-spec lower parts kit. Easily installs in seconds and instantly upgrades your rifle. This upgrade is CNC...$7.95 -
Out of stock
Fortis Magazine Release Button AR15/AR10 - Red
$7.95Fortis Magazine Release Button AR15/AR10 - RED Description: The Fortis Billet Mag Button is a superior alternative to the ones found in a mil-spec lower parts kit. Easily installs in seconds and instantly upgrades your rifle. This upgrade is CNC...$7.95 -
On Sale
Grid Defense Mil-Spec Lower Parts Kit - FDE
Sale: $59.99MSRP: $79.99Ghost Firearms Mil-Spec Lower Parts Kit - FDE FDE Cerakote Trigger Group FDE Cerakote A2 Grip Buffer Retainer Pin Buffer Retainer Spring Trigger Guard Safety Selector Bolt Catch Spring Detent Spring Bolt...Sale: $59.99MSRP: $79.99 -
Grid Defense Pistol Stabilizing Fin - Bazooka Green
$49.99Grid Defense Pistol Stabilizing Fin - Bazooka Green -Constructed from Reinforced Polymer -Increases Weapon Control and Stability -Weighs 5.7oz -Fits Pistol Buffer Tube up to 1.25" (Not Included) -Finished in Bazooka Green Cerakote$49.99 -
Grid Defense Pistol Stabilizing Fin - Burnt Bronze
$49.99Grid Defense Pistol Stabilizing Fin - Burnt Bronze -Constructed from Reinforced Polymer -Increases Weapon Control and Stability -Weighs 5.7oz -Fits Pistol Buffer Tube up to 1.25" (Not Included) -Finished in Burnt Bronze Cerakote$49.99 -
Magpul MOE-K Grip AR15/M4 - OD Green
$20.95Magpul MOE-K Grip - OD Green Replacement for AR15/M4 pistol-grip One-piece reinforced polymer construction More vertical grip angle than standard A2 grips Minimalist design$20.95 -
Magpul PSR GEN3 Precision Adjustable Stock - FDE
$259.95Magpul PSR GEN3 Precision Adjustable Stock - FDE Machined aluminum LOP and Cheek Piece adjustment knobs Steel adjustment shafts finished with Melonite Bottom M-LOK slots for sling or monopod$259.95 -
MIL-SPEC PISTOL BUFFER TUBE - BURNT BRONZE
$25.00MIL-SPEC PISTOL BUFFER TUBE - Burnt Bronze Made From: Forged 7075 aluminum Burnt Bronze Cerakote Finish **Buffer, Castle Nut, End Plate Not Included**$25.00 -
MIL-SPEC PISTOL BUFFER TUBE - TUNGSTEN GRAY
$25.00MIL-SPEC PISTOL BUFFER TUBE - Tungsten Gray Made From: Forged 7075 aluminum Tungsten Gray Cerakote Finish **Buffer, Castle Nut, End Plate Not Included**$25.00 -
Mission First Tactical Engage AR Pistol Grip - Black
$24.99Mission First Tactical AR Pistol Grip - Black Black finish Tab covers the receiver gaps Secure water resistant storage compartment Plug retention$24.99 -
Rise Armament Patriot Trigger with Challenge Coin and Anti-Walk Pins - Red
$189.99Rise Armament Patriot Trigger with Challenge Coin and Anti-Walk Pins - Red Single-stage trigger system with a lightened trigger pull (3.5-lb. pull weight) Helps you shoot more accurately with less effort Ultra smooth to the break with a crisp, clean...$189.99 -
On Sale
SB Tactical SBA3 Adjustable Pistol Brace With Grid Defense Buffer Tube Kit - Sniper Gray
Sale: $119.95MSRP: $169.95SBA3 With Grid Defense Buffer Kit - Sniper Gray SB Tactical SBA3 Pistol Stabilizing Brace - Sniper Gray Complete Grid Defense Buffer Tube Assembly Kit Carbine buffer (3 oz) Carbine buffer spring Carbine stock end plate Carbine stock lock...Sale: $119.95MSRP: $169.95 -
Out of stock
SKELETONIZED ELITE TRIGGER GUARD - TACTICAL GRAPE
$25.99PREMIUM SKELETONIZED ELITE TRIGGER GUARD - TACTICAL GRAPE This Skeletonized trigger guard is the premium option from the Vital trigger guard that comes standard with all completed lowers. With it's slim design, it offers coverage where it is needed...$25.99 -
On Sale
Strike Industries FSA Stock - Black
Sale: $185.95MSRP: $197.95Strike Industries FSA Stock - Black Patented first-in-market Picatinny dual folding adapter with intuitive unfolding system Folds left or right anytime without flipping or reconfiguring hinge Positive lock in the folded position, included rubber...Sale: $185.95MSRP: $197.95 -
Out of stock
STRIKE INDUSTRIES STRIKE SWITCH - RED
$76.95STRIKE INDUSTRIES STRIKE SWITCH - RED 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 -
Out of stock
Tactical Dynamics Skeleton Stock - Periwinkle
$109.00Tactical Dynamics Skeleton Stock Finished in Periwinkle Cerakote Made in the USA Compatible with Milspec Carbine Buffer Tube Machined from 6061-T6 Aluminum Specs 6 3/4" Long 5 1/4" Contact Area 1 1/4" Wide 9.65oz$109.00