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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Out of stock
TIMBER CREEK AR TAKEDOWN PIN SET - FLAT DARK EARTH
$19.99AR TAKEDOWN PIN SET - FLAT DARK EARTH Compatible with Milspec AR15/M4 Lower Receivers Made in the USA Machined from billet aluminum Cerakote finish These CNC machined pins are drop in replacements for Mil-Spec lowers and allow easier...$19.99 -
ALG DEFENSE DROP IN TRIGGER
$65.00ALG DEFENSE DROP IN TRIGGER Single Stage Stock Trigger Reliability Smoother Pull than Stock Triggers 6.5 Pound Pull$65.00 -
Battle Arms Development Enhanced Bolt Catch
$15.00Battle Arms Development Enhanced Bolt Catch 8620 heat treated steel Investment cast Manganese phosphate finish Versatile modular design Oversize control surfaces Raised T-shaped heel Compatible with Norgon ambi-catch Elegant tapered control...$15.00 -
Battle Arms Development Enhanced Pivot & Takedown Pin Set - Titanium
$38.95Battle Arms Development Enhanced Pivot & Takedown Pin Set - Titanium AR15 / M16 / M4 Compatible - Fits all AR15/M16/M4 lower receivers with mil-spec .250in diameter front pivot and rear takedown pin holes. Patent Pending Pivot Pin &...$38.95 -
On Sale
Grid Defense AR-10 80% Billet Lower Receiver Without Fire/Safe - Tungsten Gray
Sale: $100.00MSRP: $250.00Grid Defense AR-10 80% Lower Receiver Without Fire/Safe - Tungsten Gray Machined from 6061-T6 Billet Aluminum Made in house in the USA Flared and Broached Magwell Finished in Tungsten Gray Cerakote Does not have Fire/Safe Makings Compatible with...Sale: $100.00MSRP: $250.00 -
Magpul MOE AR15 Grip - Gray
$20.95Magpul MOE AR15 Grip - Gray One-piece reinforced polymer construction Beavertail backstrap for enhanced ergonomics Positive anti-slip texture Accepts optional Storage Cores$20.95 -
MAGPUL MOE CARBINE STOCK - OD GREEN
$44.95Magpul MOE Carbine Stock - OD Green Made in the USA Mounts on Mil-Spec Carbine Receiver Weight: 8.0oz Compatible with Magpul ASAP, ASAP QD and other Receiver Mount Sling Attachments Sloping Cheek Weld Shielded Release Latch to Prevent...$44.95 -
MIL-SPEC PISTOL BUFFER TUBE - BLUE TITANIUM
$25.00MIL-SPEC PISTOL BUFFER TUBE - BLUE TITANIUM Made From: Forged 7075 aluminum Blue Titanium Cerakote Finish **Buffer, Castle Nut, End Plate Not Included**$25.00 -
Phase5 Oversized Magazine Release - Black
$21.99Phase5 Oversized Magazine Release - Black Made in the USA Compatible with AR15/AR10 Receivers Compatible with Anti-Rotation Trigger/Hammer Pin Sets Compatible with Extended Bolt Releases Machined from Billet Aluminum Larger Contact Surface than a...$21.99 -
Out of stock
Rise Armament Lower Parts Kit - No Fire Control Group
$44.99Rise Armament Lower Parts Kit - No Fire Control Group Precise Manufacturing Long Term Reliability Durable Construction$44.99 -
On Sale
SB Tactical SBA4 Adjustable Pistol Brace With Grid Defense Buffer Tube Kit - FDE
Sale: $119.95MSRP: $169.95SBA4 with Grid Defense Buffer Kit - FDE 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 -
Out of stock
STRIKE INDUSTRIES AMBI MAGAZINE RELEASE - RED
$43.95Strike Industries AMBI Magazine Release Made in USA Low Profile and Ergonomically Designed Includes Enhanced Magazine Release Button and Spring for Complete Drop-in Upgrade Ambidextrous for The Left and Right Handed Shooters Manufactured by Strike...$43.95 -
STRIKE INDUSTRIES MAGAZINE CATCH - BLACK
$18.95STRIKE INDUSTRIES MAGAZINE CATCH - BLACK Enhanced Magazine Catch: Steel 6061-T6 Aluminum Release Button Solid Billet Aluminum Construction Unique Anodized Colors Black Finish$18.95 -
TIMBER CREEK QD END PLATE - FLAT DARK EARTH
$19.99QD END PLATE - FLAT DARK EARTH Cerakote finish Aircraft grade billet aluminum Made in the USA Accomodates right and left hand shooters Quick Disconnect End Plate replaces the standard AR end plate and adds a mounting point for QD sling swivels.$19.99 -
Out of stock
Battle Arms Development EMMR Large Enhanced Modular Magazine Release
$35.95BAD-EMMR Large Enhanced Modular Magazine Release BAD-EMMR-L (Enhanced Modular Magazine Release - Large Finger Pad) for the AR15/AR10. Precision CNC Machined for billet 7075-T6 Aluminum, the BAD-EMMR features, unique, patent-pending three...$35.95 -
FORTIS SLS FIFTY SAFETY SELECTOR - GOLD
$69.95FORTIS SLS FIFTY SAFETY SELECTOR - GOLD Precise Manufacturing Long Term Reliability Durable Construction High quality components and precise manufacturing make Fortis parts ideal for maintaining and upgrading firearms. The durability, reliability...$69.95 -
On Sale
Ghost Grip - Titanium
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
Ghost Grip - Zombie 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 -
On Sale
Grid Defense AR-15 80% Lower Receiver Without Fire/Safe Engravings - OD Green
Sale: $69.00MSRP: $170.00Grid Defense AR-15 80% Lower Receiver without Fire/Safe Engravings - OD Green Machined from 7075-T6 Aluminum Forging Finished in OD Green Cerakote Flared and broached magazine well Rear upper lug pocket cut out Fits all mil-spec upper...Sale: $69.00MSRP: $170.00 -
Grid Defense Pistol Stabilizing Fin - Blue Titanium
$49.99Grid Defense Pistol Stabilizing Fin - Blue Titanium -Constructed from Reinforced Polymer -Increases Weapon Control and Stability -Weighs 5.7oz -Fits Pistol Buffer Tube up to 1.25" (Not Included) -Finished in Blue Titanium Cerakote$49.99