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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BRAVO COMPANY GUNFIGHTER GRIP MOD 0 - BLACK
$30.00BRAVO COMPANY BCMGUNFIGHTER GRIP MOD 0 - BLACK Fits AR rifles Reduced angle for improved ergonomics Hinged trap door offering storage inside the grip Test fit to ensure proper function$30.00 -
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 -
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 -
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 -
Out of stock
Odin Works Bolt Catch - Black
$20.00Odin Works Bolt Catch - Black Fits AR-15 platform rifles Black Anodized Finish$20.00 -
PHASE5 OVERSIZED MAGAZINE RELEASE BLUE
$21.99PHASE5 OVERSIZED MAGAZINE RELEASE BLUE Features: Larger contact surface than a Mil-Spec magazine release button Ergonomic pocket on surface of paddle for your finger CNC machined from lightweight 6061-T6 billet aluminum for...$21.99 -
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 -
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 -
Out of stock
2A Armament AR-15 Takedown Pin Set - Titanium
$28.992A Armament AR-15 Takedown Pin Set - Titanium "Mil-Spec" .250 Size Pocketed Design Through Drilled for Weight Reduction 6AL-4V Titanium$28.99 -
Out of stock
AR Enhanced Ambidextrous Safety Selector - Blue
$23.99AR Enhanced Ambidextrous Safety Selector - Blue For Left or Right-Handed Shooters Replaces Existing Safety Lever Easy-To-Operate Safety Lever on Both Sides of The Receiver Does Not Interfere with Grip Position or Thumb Placement Fits Semi-Auto ...$23.99 -
Out of stockOn Sale
AR-15 Lower Parts Kit - FDE
Sale: $50.99MSRP: $55.99AR-15 Lower Parts Kit - FDE Mil-Spec Lower Parts Kit Minus Grip and Screw Ambidextrous Safety Selector Finished in FDE Cerakote Enhanced Bolt Catch Finished in FDE Cerakote Trigger Finished in FDE Cerakote Extended Takedown/Pivot Pins Finished in...Sale: $50.99MSRP: $55.99 -
AR15 AMBIDEXTROUS TALON SAFETY SELECTOR 4-LEVER KIT - BLACK
$84.95AR15 AMBIDEXTROUS TALON SAFETY SELECTOR 4-LEVER KIT - BLACK This Talon ambi safety selector is a modular design that can be installed as a standard 90° or as a 45° short throw. Selector levers install using a precision machined dovetail...$84.95 -
ATI Outdoors TactLite Stock - Fits Mossberg/Winchester/Remington 12 Gauge
$73.99ATI Outdoors TactLite Stock - Fits Mossberg/Winchester/Remington 12 Gauge Fits Mossberg/Remington/Winchester 12ga & 20ga (proud fit) Is a direct replacement and evolution of the MRW4100 Adjustable Pistol Grip Shotgun Stock$73.99