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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TRIGGER GUARD PIN - AR15
$1.99TRIGGER GUARD PIN Compatible with AR15/M4 Lower Receivers American Made$1.99 -
Magazine Catch and Button
$7.99MAGAZINE CATCH WITH BUTTON - AR15/M16 Magazine Catch Magazine Release Button Compatible with AR15/M4 Lower Receivers American Made$7.99 -
Out of stock
Grid Defense Nickel Boron Fire Control Group
$39.00Grid Defense Nickel Boron Fire Control Group Nickel Boron Disconnect Nickel Boron Trigger Nickel Boron Hammer Compatible with AR15/AR10$39.00 -
Out of stock
Mil-Spec Lower Parts Rifle Kit Nickel Boron
$99.00Includes: Lower Parts Kit with NiB Fire Control Group Nickel Boron Trigger Group A2 Grip Buffer Retainer Pin Buffer Retainer Spring Trigger Guard Safety Selector Bolt Catch Spring Detent Spring Bolt...$99.00 -
Out of stock
STRIKE INDUSTRIES ULTRA LIGHT PIVOT / TAKEDOWN PINS - RED
$16.95STRIKE INDUSTRIES PARTS - ULTRA LIGHT AR 15 RED TAKEDOWN PINS Billet 7075 aluminum Red Finish Extended grasping surface Extended pivot pin / 1.31" length Extended takedown pin /1.08" length For AR-15 lowers Ultra light and ultra strong...$16.95 -
Out of stock
Creed Monarch AR15 H3 Carbine Buffer
$40.00AR15 H1 Carbine Buffer Made in the USA Machined from Top Quality Material Weighs 5.0oz Manufactured by Creed Monarch$40.00 -
On Sale
GHOST MIL-SPEC CARBINE BUFFER TUBE KIT WITH M4 STOCK
Sale: $35.99MSRP: $53.00Ghost 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 Carbine Buffer Spring Carbine Buffer Weight: 9.75oz Hard Coat Black...Sale: $35.99MSRP: $53.00 -
Out of stock
Creed Monarch AR15 H2 Carbine Buffer
$30.00AR15 H2 Carbine Buffer Made in the USA Machined from Top Quality Material Weighs 4.7oz Manufactured by Creed Monarch$30.00 -
PISTOL GRIP LOCK WASHER - AR15
$1.99PISTOL GRIP LOCK WASHER - AR15 Compatible with AR15/M4/AR10 Lower Receivers American Made$1.99 -
On Sale
SB Tactical SBA3 Adjustable Pistol Brace With Grid Defense Buffer Tube Kit - OD Green
Sale: $119.95MSRP: $169.95SBA3 With Grid Defense Buffer Kit - OD Green SB Tactical SBA3 Pistol Stabilizing Brace - OD Green Complete Grid Defense Buffer Tube Assembly Kit Carbine buffer (3 oz) Carbine buffer spring Carbine stock end plate Carbine stock lock...Sale: $119.95MSRP: $169.95 -
Out of stockOn Sale
Grid Defense AR-9 80% Lower Receiver Without Fire/Safe Engravings - Black
Sale: $79.99MSRP: $179.00Grid Defense AR-9 80% Lower Receiver - Black Finished in hard coat black anodize Machined from 6061 billet aluminum Compatible with any Glock style small frame pistol calibers Compatible with Glock pattern or style magazines Magazine release...Sale: $79.99MSRP: $179.00 -
Out of stock
Magpul MOE Trigger Guard - FDE
$8.95Magpul MOE Trigger Guard - Flat Dark Earth Constructed from Advanced Polymer Compatible with the AR15/M4 Platform All Mounting Hardware Included Made in the USA$8.95 -
Out of stock
Tactical Dynamics Skeleton Grip - Tactical Grape
$79.00Tactical Dynamics Skeleton Grip - Tactical Grape Finished in Purple Cerakote Machined from 7075-T6 Aluminum Durable and Lightweight Compatible with AR15/AR10 Platforms Unique Design Made in the USA$79.00 -
Out of stock
Sylvan Arms Folding Hinge Stock Adapter - Gen 3
$179.99The Sylvan Arms Folding Hinge Stock Adapter allows you to fold your stock and significantly reduce the length of your rifle for easy stow and travel.Specifically designed for gas piston and direct impingement systems 5.56 to .308 systems, as well as .223...$179.99 -
Skeletonized Elite Trigger Guard
$24.99Premium Skeletonized Elite 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 where it is needed serving its...$24.99 -
$9.99 -
Out of stock
BOLT CATCH PLUNGER - AR15
$1.99BOLT CATCH PLUNGER Compatible with AR15/M4 Lower Receivers American Made$1.99 -
Out of stockOn Sale
Grid Defense AR-15 80% Lower Receiver Without Fire/Safe Engravings - FDE
Sale: $69.00MSRP: $170.00Grid Defense AR-15 80% Lower Receiver without Fire/Safe Engravings - FDE Machined from 7075-T6 Aluminum Forging Finished in Magpul Flat Dark Earth Cerakote Flared and broached magazine well Rear upper lug pocket cut out Fits all mil-spec upper...Sale: $69.00MSRP: $170.00 -
On Sale
Tactical Dynamics Skeleton Stock - Blue Titanium
Sale: $56.00MSRP: $109.00Tactical Dynamics Skeleton Stock Finished in Blue Titanium Cerakote Made in the USA Compatible with Milspec Carbine Buffer Tube Machined from 6061-T6 Aluminum Specs 6 3/4" Long 5 1/4" Contact Area 1 1/4" Wide 9.65ozSale: $56.00MSRP: $109.00 -
$1.99