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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Ghost Firearms Mil-Spec Lower Parts Kit
$59.99Ghost Firearms Mil-Spec 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 Bolt...$59.99 -
Complete Rifle Parts Kit - AR15
$94.99Complete Rifle Parts Kit 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 Bolt...$94.99 -
Grid Defense Mil-Spec Carbine Buffer Tube Assembly
$35.00Grid Defense 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...$35.00 -
M4 Mil-Spec Stock
$18.00Six position M4 Stock for AR-15 / M4 Carbine Rifles is structurally reinforced, feels more like A2 Stock when fully extended. The sling swivel can be offset to either left or right. Fits mil-spec buffer tubes. Black. Made in USA.$18.00 -
OOPS KIT - REPLACEMENT PARTS
$9.99AR 15 Oops Kit includes: (1) Hammer spring (1) Trigger spring (2) Hammer/trigger pins (1) Disconnector spring (2) Takedown/pivot pin detents (2) Takedown/pivot pin springs (1) Safety spring (1) Safety detent (1) Magazine release...$9.99 -
Out of stock
Tactical Dynamics Skeleton Grip - Black
$79.00Tactical Dynamics AR15 Skeletonized Grip - Black AR 15 Skeleton Grip Finished in a black cerakote...$79.00 -
On Sale
AR10 Lower Parts Kit
Sale: $59.00MSRP: $79.00Includes: Trigger Group A2 Grip Buffer Retainer Pin Buffer Retainer Spring Trigger Guard Safety Selector Bolt Catch Spring Detent Spring Bolt Catch Plunger Bolt Catch Magazine Catch Spring Bolt Catch...Sale: $59.00MSRP: $79.00 -
MAGPUL MOE STOCK - MILSPEC - BLACK
$44.95Magpul MOE Carbine Stock - Black Sloping cheek weld combines a slim profile with user comfort Shielded release latch prevents snagging and accidental operation Premium chrome-silicon lock spring provides positive locking and long service life Side...$44.95 -
Out of stock
SB Tactical SBA3 Pistol Stabilizing Brace - Black
$129.00SB Tactical SBA3 Pistol Stabilizing Brace - Black US Veteran Designed 5 Position Adjustable Ambi QD Mount Minimalist Design ATF Compliant Made in the USA Does not include Buffer Tube$129.00 -
Out of stock
SB TACTICAL SBA4 PISTOL STABILIZING BRACE - BLACK
$129.00SB TACTICAL SBA4 PISTOL STABILIZING BRACE - BLACK US Veteran Designed 5 Position Adjustable Ambi QD Mount ATF Compliant Made in the USA Does not include Buffer Tube Assembly$129.00 -
TAKEDOWN/PIVOT PIN SPRING - AR15
$1.99TAKEDOWN PIN SPRING /PIVOT PIN SPRING - AR15 Compatible with AR15/M4 Lower Receivers AR15 Takedown Pin Spring American Made$1.99 -
Vital Trigger Guard
$5.99Standard Vital Trigger Guard With it's slim design, it offers coverage where it is needed serving its purpose: but yet not getting in the way when inquiring your target. Material: Plastic Weight: 1.54oz Includes: Pin & Allen Set...$5.99 -
TAKEDOWN/PIVOT PIN DETENT
$1.99TAKEDOWN PIN SPRING /PIVOT PIN SPRING - AR15 Compatible with AR15/M4 Lower Receivers American Made$1.99 -
MIL-SPEC CARBINE BUFFER TUBE KIT WITH MAGPUL MOE CARBINE STOCK
$79.95MIL-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...$79.95 -
BUFFER RETAINER SPRING - AR15
$1.99BUFFER RETAINER SPRING Compatible with AR15/M4 Lower Receivers American Made$1.99 -
Out of stock
Tactical Dynamics Skeleton Grip - Blue Titanium
$79.00Tactical Dynamics Skeleton Grip - Blue Titanium Finished in Blue Titanium Cerakote Machined from 7075-T6 Aluminum Durable and Lightweight Compatible with AR15/AR10 Platforms Unique Design Made in the USA$79.00 -
VITAL TRIGGER GUARD - BLUE TITANIUM
$15.99Vital Trigger Guard - Blue Titanium With it's slim design, it offers coverage where it is needed serving its purpose: but yet not getting in the way when inquiring your target. Material: Plastic Weight: 1.54oz Includes: Pin & Allen Set...$15.99 -
Trinity Force Alpha Stock
$19.99Trinity Force Alpha Stock Snag Free Design Mil-Spec AR stock with Multiple Sling Mounting Options Textured Rubber Butt Pad Durable and Lightweight$19.99 -
Out of stock
Tactical Dynamics Skeleton Grip - FDE
$79.00Tactical Dynamics Skeleton Grip - Flat Dark Earth Finished in Magpul FDE 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
Tactical Dynamics Skeleton Grip - Burnt Bronze
$79.00Tactical Dynamics Skeleton Grip - Burnt Bronze Finished in Burnt Bronze Cerakote Machined from 7075-T6 Aluminum Durable and Lightweight Compatible with AR15/AR10 Platforms Unique Design Made in the USA$79.00