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 Pistol Stabilizing Fin Assembly
Sale: $44.99MSRP: $79.99Grid Defense Pistol Stabilizing Brace Assembly Pistol Buffer Tube Castle Nut End Plate Buffer Buffer Spring Pistol Stabilizing Blade (Constructed from Reinforced Polymer)Sale: $44.99MSRP: $79.99 -
On Sale
Grid Defense Pistol Stabilizing Fin
Sale: $32.99MSRP: $39.99Grid Defense Pistol Stabilizing Fin -Constructed from Reinforced Polymer -Increases Weapon Control and Stability -Weighs 5.7oz -Fits Pistol Buffer Tube up to 1.25" (Not Included)Sale: $32.99MSRP: $39.99 -
$2.99 -
Out of stock
Magpul PMAG Gen M2 MOE 30rd .223/5.56 Magazine - Black
$12.95Magpul PMAG Gen M2 MOE 30rd .223/5.56 Magazine - Black 30-round reliability with no stoppages Flared floorplate aids magazine handling and disassembly and is slim enough for use with many double and triple pouches The anti-tilt, self-lubricating...$12.95 -
On Sale
MIL-SPEC CARBINE BUFFER TUBE KIT WITH TRINITY FORCE ALPHA STOCK
Sale: $39.99MSRP: $54.99MIL-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 Carbine Buffer Spring Carbine Buffer Weight: 9.75oz Hard Coat Black...Sale: $39.99MSRP: $54.99 -
Out of stockOn Sale
Ghost Grip - Black
Sale: $8.99MSRP: $15.99The 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: $15.99 -
Out of stockOn Sale
Tactical Dynamics Skeleton Stock - Black
Sale: $56.00MSRP: $109.00Tactical Dynamics Skeletonized Stock Made in the USA Black Cerakote Finish Machined from 6061-T6 Aluminum Minimalist Stock Compatible with Milspec Carbine Buffer Tubes Specs 6 3/4" Long 5 1/4" Contact Area 1 1/4" Wide 9.65ozSale: $56.00MSRP: $109.00 -
Out of stock
SELECTOR DETENT - AR15
$1.99AR15 SELECTOR DETENT Compatible with AR15/M4 Lower Receivers American Made$1.99 -
Out of stock
Creed Monarch 9mm Steel Buffer
$29.009mm Steel Buffer Heavy to soften felt recoil on semi-automatic and full automatic guns 9mm Carbine Buffer 5.3oz$29.00 -
Out of stockOn Sale
Tactical Dynamics Skeleton Grip - OD Green
Sale: $69.00MSRP: $79.00Tactical Dynamics Skeleton Grip - OD Green Finished in Magpul Olive Drab Green Machined from 7075-T6 Aluminum Durable and Lightweight AR Skeleton Pistol Grip. Compatible with AR15/AR10 Platforms Unique Design Made in the USASale: $69.00MSRP: $79.00 -
Magpul MOE AR Grip - Flat Dark Earth
$20.95Magpul MOE Grip - Flat Dark Earth AR15/M4 Pistol Grip Flat Dark Earth Reinforced Polymer Construction Beavertail Backstrap Anti Slip Texture 25 Degree Angle Grip Weighs 2.8oz$20.95 -
Out of stockOn Sale
Grid Defense AR-10 80% Billet Lower Receiver Without Fire/Safe - Black
Sale: $90.00MSRP: $225.00Grid Defense AR-10 80% Lower Receiver Without Fire/Safe - Black Machined from 6061-T6 Billet Aluminum Made in house in the USA Flared and Broached Magwell Finished in Hard Coat Black Anodize Does not have Fire/Safe Makings Compatible with DPMS...Sale: $90.00MSRP: $225.00 -
Out of stockOn Sale
Grid Defense AR-10 80% Billet Lower Receiver Without Fire/Safe - Raw
Sale: $75.00MSRP: $175.00Grid Defense AR-10 80% Lower Receiver Without Fire/Safe - Raw Machined from 6061-T6 Billet Aluminum Made in house in the USA Flared and Broached Magwell Raw Aluminum Finish Does not have Fire/Safe Makings Compatible with DPMS Standard Upper...Sale: $75.00MSRP: $175.00 -
Complete Rifle Parts Kit - AR10
$119.00Complete AR10 Rifle Parts Kit AR10 Lower Parts Kit Trigger Group A2 Grip Buffer Retainer Pin Buffer Retainer Spring Trigger Guard Safety Selector Bolt Catch Spring Detent Spring Bolt Catch Plunger...$119.00 -
PISTOL GRIP SCREW - AR15
$2.99PISTOL GRIP SCREW - AR15 Compatible with AR15/M4/AR10 Lower Receivers American Made$2.99 -
$1.99 -
Out of stockOn Sale
Grid Defense AR-15 80% Lower Receiver With Fire/Safe Engravings 3 Pack - Black
Sale: $155.00MSRP: $400.00Grid Defense AR-15 80% Lower Receiver With Fire/Safe Engravings 3 Pack - Black Includes 3 80% Lower Receivers Machined from 7075-T6 Aluminum Forging 8625 Type III Hardcoat Anodize – Black Flared and broached magazine well Rear upper lug...Sale: $155.00MSRP: $400.00 -
Magpul Moe AR Grip - Black
$20.95MAGPUL MOE GRIP - BLACK AR15/M4 Pistol Grip Reinforced Polymer Construction Beavertail Backstrap Anti Slip Texture 25 Degree Angle Grip Weighs 2.8oz$20.95 -
Out of stockOn Sale
STRIKE INDUSTRIES ULTRA LIGHT PIVOT / TAKEDOWN PINS - BLACK
Sale: $14.35MSRP: $15.95STRIKE INDUSTRIES ULTRA LIGHT PIVOT/TAKEDOWN PINS - BLACK Finished in Anodized Black Extended grasping surface Extended pivot pin / 1.31" length Extended takedown pin /1.08" length For AR-15 lowers Ultra light and ultra strong constructionSale: $14.35MSRP: $15.95 -
Out of stockOn Sale
SB Tactical SBA3 Adjustable Pistol Brace With Grid Defense Buffer Tube Kit - Black
Sale: $119.95MSRP: $169.95SBA3 With Grid Defense Buffer Kit - Black SB Tactical SBA3 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