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
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 -
MIL-SPEC CARBINE BUFFER TUBE - PINK CHAMPAGNE
$30.00MIL-SPEC CARBINE BUFFER TUBE - PINK CHAMPAGNE Made in the USA Compatible with M4 Type Butt Stocks 6 Position Machined from 7075-T6 Aluminum Weight: 3.6oz Pink Champagne Cerakote Finish$30.00 -
Out of stock
Odin Works XMR3 Extended Mag Release - Gen 3
$22.00Odin Works XMR3 Extended Mag Release - Gen 3 Compatible with BAD Lever Compatible with KNS Pins .1 oz (including paddle, button, and screws) Large surface area for quick magazine reloads Easy to reach Ergonomic design Release magazine without changing...$22.00 -
On Sale
SB Tactical SBA4 Adjustable Pistol Brace With Grid Defense Buffer Tube Kit - OD Green
Sale: $119.95MSRP: $169.95SBA4 with Grid Defense Buffer Kit - OD Green 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
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 -
Spike's Enhanced Lower Parts Kit
$181.00Spike's Enhanced Lower Parts Kit 556 - Black Better than Mil-Spec quality Five Upgrades Over Standard Parts Kit Battle Trigger Group (Nickel Boron Coated)Billet Tool-less Trigger GuardBlack Ergo GripBlack KNS Anti Rotation Gen 2 Mod 2Ambi Safety Also...$181.00 -
On Sale
Strike Industries AR-15 Enhanced Bolt Catch - Black
Sale: $14.95MSRP: $15.95Strike Industries AR-15 Enhanced Bolt Catch - Black Mil-Spec Bolt Catch Wide Surface Area Bolt Catch Latch for Enhanced Operation Solid Steel Construction Sleek SI DesignSale: $14.95MSRP: $15.95 -
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 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 -
On 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 -
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 -
MIL-SPEC CARBINE BUFFER TUBE - FDE
$30.00MIL-SPEC CARBINE BUFFER TUBE - FDE Made in the USA Compatible with M4 Type Butt Stocks 6 Position Machined from 7075-T6 Aluminum Weight: 3.6oz Flat Dark Earth Cerakote Finish$30.00 -
MIL-SPEC CARBINE BUFFER TUBE - TUNGSTEN GRAY
$30.00MIL-SPEC CARBINE BUFFER TUBE - TUNGSTEN GRAY Made in the USA Compatible with M4 Type Butt Stocks 6 Position Machined from 7075-T6 Aluminum Weight: 3.6oz Tungsten Gray Cerakote Finish$30.00 -
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 -
Strike Industries AR Flip Switch - Red
$43.95Strike Industries AR Flip Switch - Red Package includes:- 2x Shaft Screw- 1x 60/90 Shaft- 1x End Cap- 1x Right Side Flip Switch- 1x Left Side Flip Switch Features- Ambidexterous- Ergonomic Shape- Modular Assembly- Strike 60/90 Option Note: Not...$43.95 -
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 -
Out of stock
TIMBER CREEK AMBIDEXTROUS SAFETY SELECTOR - OLIVE DRAB GREEN
$39.99AMBIDEXTROUS SAFETY SELECTOR - OD GREEN Left or right hand shooters Manufactured in USA Aircraft grade aluminum Drop in replacement part for OEM safety selector ...$39.99 -
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 -
Out of stock
TIMBER CREEK AMBIDEXTROUS SAFETY SELECTOR - PURPLE
$39.99TIMBER CREEK AMBIDEXTROUS SAFETY SELECTOR - PURPLE Choose from variety of colors Made in the USA Manufactured by Timber Creek Outdoors Billet aluminum material$39.99