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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TIMBER CREEK RECEIVER EXTENSION PLATE - TUNGSTEN
$69.99TIMBER CREEK RECEIVER EXTENSION PLATE - TUNGSTEN Made in the USA Aircraft grade billet aluminum Fits all carbine length milspec buffer tube Manufactured by Timber Creek Outdoors Inc.$69.99 -
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 -
Armaspec XPDW 5 Position Adjustable Stock Gen 2 - Black
$219.99Armaspec XPDW 5 Position Adjustable Stock Gen 2 - Black Precise Manufacturing Long Term Reliability Durable Construction Fits Mil-Spec Buffer Tube$219.99 -
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 -
On Sale
Battle Arms Development Enhanced AK Trigger - Black
Sale: $49.50MSRP: $55.00Battle Arms Development Enhanced AK Trigger - Black Distinctive trigger bow design Short, smooth, and positive reset Maximum compatibility with most standard production AK patterned firearms Made in the USASale: $49.50MSRP: $55.00 -
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 -
Out of stock
CAA COLLAPSIBLE BUTT STOCK - BLACK
$59.35CAA COLLAPSIBLE BUTT STOCK - BLACK Storage compartment for CR123 batteries. Side Picatinny rail – allows addition of Adjustable cheek-rest (#ACP), mag’ pouch (#MPS) or shell holder (#SSM). Rubber non-slip buttpad with tapered...$59.35 -
Out of stock
Elftmann Tactical 3 Gun Straight Trigger
$279.00Elftmann Tactical 3 Gun Straight Trigger Drop-safe regardless of pull-weight Adjustable from 4lbs to 2 3/4lbs without removing from lower Very short pull and reset$279.00 -
Out of stock
Ergo MSR Compact AR-15 Pistol Grip - Black
$17.99Ergo MSR Compact AR-15 Pistol Grip - Black MSR Upgraded Pistol Grip Aggressive Texturing Integral rear upper extension supports the web of the shooters hand Mounting hardware included$17.99 -
F-1 Firearms SSK Safety Selector Kit - Black
$64.99F-1 Firearms SSK Safety Selector Kit - Black 90 Degree Throw Anodized Finish Skeletonized Construction 1 Long and 1 Short Paddle Includes Tube, Detent, Spring and 2 Screws$64.99 -
Out of stock
Fortis Magazine Release Button AR15/AR10 - Black
$7.95Fortis Magazine Release Button AR15/AR10 - Black 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 - FDE
$7.95Fortis Magazine Release Button AR15/AR10 - FDE 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 Mil-Spec Carbine Buffer Tube Assembly - Tequila Sunrise
$40.00Grid Defense Mil-Spec Carbine Buffer Tube Kit - Tequila Sunrise Made in the USA Compatible with M4 Type Butt Stocks 6 Position Carbine Buffer Tube Machined from 7075-T6 Aluminum End Plate Castle Nut Carbine Buffer Spring Carbine Buffer Weight:...$40.00 -
Magpul MOE Plus Grip - Gray
$24.95Magpul MOE Plus Grip - Gray Replacement for AR15/M4 pistol-grip One-piece reinforced polymer construction with wrap-around rubber backstrap$24.95 -
Magpul MOE-K2 AK Grip - Black
$20.95Magpul MOE-K2 AK Grip - Black Drop-in upgrade for AK47/AK74 pistol grips More vertical grip angle than typical AK designs Aggressive TSP texture for positive weapon control$20.95 -
Odin Works Bolt Catch - Black
$20.00Odin Works Bolt Catch - Black Fits AR-15 platform rifles Black Anodized Finish$20.00 -
Out of stock
Phase5 Hex-2 AR15 Pistol Buffer Tube - Red
$59.95Phases Hex-2 AR15 Pistol Buffer Tube - Red Model: Hex-2Product Type: Buffer TubeFinish/Color: RedFit: AR-15 PistolAccessories: Includes Castle Nut, End Plate, Foam PadDescription: Specifically designed to fit SIG SB15 Stabilizing Brace$59.95