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 stockOn Sale
Aero Precision M5 Lower Parts Kit
Sale: $92.99MSRP: $99.99Aero Precision M5 Lower Parts Kit Magpul MOE Grip in Black M5 (.308) Takedown Pin M5 (.308) Pivot Pin Takedown/Pivot Detent Takedown/Pivot Spring M5 (.308) Bolt Catch Bolt Catch Buffer Bolt Catch Roll Pin Bolt Catch Spring Extended Magazine...Sale: $92.99MSRP: $99.99 -
Armaspec AR-10 Soud Mitigation Buffer Gen 3 - Black
$59.99Armaspec AR-10 Soud 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...$59.99 -
Out of stockOn Sale
Grid Defense AR-15 80% Lower Receiver With Fire/Safe Engravings 10 Pack - Black
Sale: $474.99MSRP: $1,400.00Grid Defense AR-15 80% Lower Receiver With Fire/Safe Engravings 10 Pack - Black Includes 10 80% Lower Receivers Machined from 7075-T6 Aluminum Forging 8625 Type III Hardcoat Anodize – Black Flared and broached magazine well Rear upper lug...Sale: $474.99MSRP: $1,400.00 -
Out of stockOn Sale
Grid Defense AR-9 80% Lower Receiver Without Fire/Safe Engravings - Burnt Bronze
Sale: $89.00MSRP: $179.00Grid Defense AR-9 80% Lower Receiver - Burnt Bronze Finished in Burnt Bronze Cerakote Machined from 6061 billet aluminum Compatible with any Glock style small frame pistol calibers Compatible with Glock pattern or style magazines Magazine release...Sale: $89.00MSRP: $179.00 -
HAMMER SPRING - AR15
$2.99HAMMER SPRING - AR15 Compatible with AR15/M4 Lower Receivers American Made$2.99 -
Magpul MOE K-2 AR Pistol Grip - FDE
$20.95Magpul MOE K-2 AR Pistol Grip - FDE Replacement for AR15/M4 pistol-grip One-piece reinforced polymer construction More vertical grip angle than A2 grips Aggressive TSP texture Weight: 2.9oz Thickness: 1.2" Height: 4.1" Grip Angle: 17...$20.95 -
On Sale
Mil-Spec Carbine Buffer Tube Assembly
$37.00 - $45.00Mil-Spec Carbine Buffer Tube Assembly 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 Available in Hard Coat Black Anodized...$37.00 - $45.00 -
Out of stock
SKELETONIZED ELITE TRIGGER GUARD - BURNT BRONZE
$25.99PREMIUM SKELETONIZED ELITE TRIGGER GUARD - BURNT BRONZE 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 -
Out of stock
STRIKE INDUSTRIES FANG BILLET TRIGGER GUARD - RED
$21.95STRIKE INDUSTRIES FANG BILLET TRIGGER GUARD - RED Contents:- 1x Aluminum Trigger Guard- 4x M3 Hex Screw- 1x Warning card Features:- Aircraft grade aluminum construction- Magazine reload assist- Cleaner, faster reloads- Lightweight (.4 oz with...$21.95 -
Out of stock
TIMBER CREEK AMBIDEXTROUS SAFETY SELECTOR - ORANGE
$39.99AMBIDEXTROUS SAFETY SELECTOR - ORANGE Lightweight material Made in the USA Multiple configurations for shooters Manufactured by Timber Creek Outdoors Inc.+$39.99 -
TIMBER CREEK AR OVERSIZED TRIGGER GUARD - PURPLE
$23.99AR OVERSIZED TRIGGER GUARD - PURPLE Drop in Trigger Guard Larger space for gloved or large firing hand Weight 0.4oz. Manufactured by Timber Creek Outdoors, Inc. Purple Anodized Finish$23.99 -
Out of stock
TIMBER CREEK ENFORCER AR PISTOL GRIP - BLACK
$99.99ENFORCER AR PISTOL GRIP - BLACK Weighs 4oz. Skeletonized grip Cerakote finish Manufactured by Timber Creek Outdoors Inc.$99.99 -
TIMBER CREEK ENFORCER AR PISTOL GRIP - BLUE
$99.99TIMBER CREEK ENFORCER AR PISTOL GRIP - BLUE Blue anodized with clear cerakote finish Drop in replacement mounts to standard lower receiver lightweight Skeletonized grip$99.99 -
Out of stock
Bravo Company Gunfighter's Grip Mod3 - Black
$20.00Bravo Company Gunfighter's Grip MOD3 - Black Fits AR rifles Reduced angle for improved ergonomics Hinged trap door offering storage inside the grip Up to 1/4" wider than Mod 0 and Mod 1$20.00 -
Out of stockOn Sale
Grid Defense AR-10 80% Billet Lower Receiver Without Fire/Safe - Blue Titanium
Sale: $100.00MSRP: $250.00Grid Defense AR-10 80% Lower Receiver Without Fire/Safe - Blue Titanium Machined from 6061-T6 Billet Aluminum Made in house in the USA Flared and Broached Magwell Finished in Blue Titanium Cerakote Does not have Fire/Safe Makings Compatible with...Sale: $100.00MSRP: $250.00 -
Grid Defense Complete Lower Pistol Build Kit - FDE
$109.99Ghost Firearms Complete Lower Pistol Build Kit - FDE FDE Cerakote Trigger Group FDE Cerakote A2 Grip Buffer Retainer Pin Buffer Retainer Spring Trigger Guard Safety Selector Bolt Catch Spring Detent...$109.99 -
Magpul CTR Mil-Spec Stock - OD Green
$64.95Magpul CTR Mil-Spec Stock - OD Green Mounts on milspec-sized receiver extension tube Shielded release latch Removable butt-pad Sling mounts$64.95 -
Out of stock
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 -
Out of stock
SKELETONIZED ELITE TRIGGER GUARD - TUNGSTEN GRAY
$25.99PREMIUM SKELETONIZED TRIGGER GUARD - TUNGSTEN GRAY ELITE AR15 TRIGGER GUARD 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...$25.99 -
Out of stock
STRIKE INDUSTRIES FANG BILLET TRIGGER GUARD - BLACK
$19.95STRIKE INDUSTRIES FANG BILLET TRIGGER GUARD - BLACK Contents:- 1x Aluminum Trigger Guard- 4x M3 Hex Screw- 1x Warning card Features:- Aircraft grade aluminum construction- Magazine reload assist- Cleaner, faster reloads- Lightweight (.4 oz with...$19.95