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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On Sale
Grid Defense AR10/.308 Mil-Spec Carbine Buffer Tube Assembly
Sale: $44.99MSRP: $54.99Grid Defense AR-10/.308 Mil-Spec Carbine Buffer Tube Kit Made in the USA Compatible with M4 Type Butt Stocks 6 Position Carbine Buffer Tube Machined from 7075-T6 Aluminum End Plate Castle Nut .308 Carbine Buffer Spring .308 Carbine Buffer (3...Sale: $44.99MSRP: $54.99 -
Magpul MOE Polymer Trigger Guard - Black
$9.95Magpul MOE Polymer Trigger Guard - Black Constructed from Advanced Polymer Compatible with the AR15/M4 Platform All Mounting Hardware Included Made in the USA Easily installed without the use of specialized tools Ergonomic and enlarged...$9.95 -
Out of stockOn Sale
Grid Defense AR-10 80% Billet Lower Receiver Without Fire/Safe - OD Green
Sale: $100.00MSRP: $250.00Grid Defense AR-10 80% Lower Receiver Without Fire/Safe - OD Green Machined from 6061-T6 Billet Aluminum Made in house in the USA Flared and Broached Magwell Finished in OD Green Cerakote Does not have Fire/Safe Makings Compatible with DPMS...Sale: $100.00MSRP: $250.00 -
GRID DEFENSE MIL-SPEC LOWER PARTS KIT WITH BLACK MAGPUL MOE + GRIP
$79.99GRID DEFENSE MIL-SPEC LOWER PARTS KIT WITH MAGPUL MOE GRIP This complete lower parts kit includes all the components needed to build out your lower receiver minus the buffer tube assembly. Includes: Magpul MOE+ Grip Magpul MOE Trigger...$79.99 -
Out of stock
Armaspec AR-15 Sound Mitigation Buffer Gen 3 - Black
$59.99Armaspec Sound Mitigation Buffer Gen 3 - Black Single-stage captured drop-in replacement for your standard buffer and spring Reduce felt recoil Keep the buffer spring from rubbing against the inner wall of the buffer tube providing smooth and quiet...$59.99 -
Out of stockOn Sale
Ghost Grip - Burnt Bronze
Sale: $8.99MSRP: $19.99The Ghost Grip is designed for Made In the USA Made From: reinforced Plastic composite Slim Lightweight Design Incorporates finger groves to insure a tight and comfortable hold Ghost "G" Engraved into the left hand side of...Sale: $8.99MSRP: $19.99 -
$7.99 -
On Sale
TIMBER CREEK ENFORCER AR PISTOL GRIP - OD GREEN
Sale: $69.99MSRP: $99.99TIMBER CREEK ENFORCER AR PISTOL GRIP - OD GREEN Made in USA Cerakote finish CNC machined from aircraft grade billet aluminum Manufactured by Timber Creek Outdoors Inc.Sale: $69.99MSRP: $99.99 -
Magpul CTR Carbine Stock - FDE
$64.95Magpul CTR Carbine Stock - FDE Made in U.S.A. FEATURES Mounts on mil-spec sized carbine receiver extension tube (not included) from manufacturers such as Colt, Armalite, S&W, LMT, and others (please see the note below) Supplemental friction...$64.95 -
$6.99 -
Out of stock
Extended Takedown and Pivot Pins
$5.99Extended Takedown and Pivot Pins Mil-Spec Extended and grooved grip 8620 Alloy steel construction Black Melonite finish Fits: AR-15$5.99 -
Out of stockOn Sale
Grid Defense AR-15 80% Lower Receiver Without Fire/Safe Engravings - Burnt Bronze
Sale: $69.00MSRP: $170.00Grid Defense AR-15 80% Lower Receiver without Fire/Safe Engravings - Burnt Bronze Machined from 7075-T6 Aluminum Forging Finished in Burnt Bronze Cerakote Flared and broached magazine well Rear upper lug pocket cut out Fits all mil-spec upper...Sale: $69.00MSRP: $170.00 -
On Sale
SB Tactical SBA4 Adjustable Pistol Brace With Grid Defense Buffer Tube Kit - Sniper Gray
Sale: $119.95MSRP: $169.95SBA4 with Grid Defense Buffer Kit - Sniper Gray SB Tactical SBA4 Pistol Stabilizing Brace Complete Grid Defense Buffer Tube Assembly Kit Carbine buffer (3 oz) Carbine buffer spring Carbine stock end plate Carbine stock lock ring-castle nutSale: $119.95MSRP: $169.95 -
Spike's Tactical Standard AR15 Lower Parts Kit
$85.00Spike's Tactical Lower Parts Kit Better than Mil-Spec quality Included Rounded Hammer (Works with ALL Calibers) and Hammer Spring Trigger and Trigger Spring Disconnector and Disconnector Spring Stainless Hammer and Trigger Pin with Black Oxide...$85.00 -
Strike Industries Anti-Rotation/Anti-Walk Trigger/Hammer Pins - Black
$17.95Strike Industries AR-15 Antiwalk/Antirotation Trigger/Hammer Pins Black - Black .154” pin diameter Machined from S45C steel Black Nitride finished Polished bearing surface Toolless installation Improved trigger feel$17.95 -
Out of stock
Armaspec Sound Mitigation Buffer Gen 3 - 9MM
$59.99Armaspec Sound Mitigation Buffer Gen 3 - 9MM Buffer Weight - 9.88oz Actual Weight/6.9oz Equivalent Weight Single-stage captured drop-in replacement for your standard buffer and spring Reduce felt recoil Keep the buffer spring from rubbing against...$59.99 -
$4.99 -
On Sale
Ghost Grip - OD Green
Sale: $8.99MSRP: $19.99The Ghost Grip is designed for Made In the USA Made From: reinforced Plastic composite Slim Lightweight Design Incorporates finger groves to insure a tight and comfortable hold Ghost "G" Engraved into the left hand side of...Sale: $8.99MSRP: $19.99 -
Out of stockOn Sale
Grid Defense AR-15 80% Lower Receiver Without Fire/Safe Engravings - Black
Sale: $55.00MSRP: $150.00Grid Defense AR-15 80% Lower Receiver without Fire/Safe Engravings - Black Machined from 7075-T6 Aluminum Forging 8625 Type III Hardcoat Anodize – Black Flared and broached magazine well Rear upper lug pocket cut out Fits all mil-spec upper...Sale: $55.00MSRP: $150.00 -
Grid Defense Pistol Stabilizing Fin - FDE
$49.99Grid Defense Pistol Stabilizing Fin - FDE -Constructed from Reinforced Polymer -Increases Weapon Control and Stability -Weighs 5.7oz -Fits Pistol Buffer Tube up to 1.25" (Not Included)$49.99