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 AR Grip - Pink
$19.95Magpul MOE Grip - Pink AR15/M4 Pistol Grip Flat Dark Earth Reinforced Polymer Construction Beavertail Backstrap Anti Slip Texture 25 Degree Angle Grip Weighs 2.8oz$19.95 -
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
Mil-Spec Lower Parts Kit Nickel Boron
$79.00Mil-Spec Lower Parts Kit Nickel Boron Includes: Nickel Boron Trigger Group A2 Grip Buffer Retainer Pin Buffer Retainer Spring Trigger Guard Safety Selector Bolt Catch Spring Detent Spring Bolt...$79.00 -
Out of stock
Noveske STS 60 Degree Safety Selector
$37.95Noveske STS 60 Degree Safety Selector Nitride Finish 60 Degree Throw Machined Stainless Construction Tuned for Standard Actuation Force from Safe & Smooth Return from Fire$37.95 -
Rise Armament Super Sporting Trigger with Anti-Walk Pins - Don't Tread On Me Edition
$139.00Rise Armament Super Sporting Trigger with Anti-Walk Pins - Don't Tread On Me Edition Clean break with a short reset Enhances accuracy by minimizing gun disturbance and allows faster initial and follow up shots when compared to a standard trigger...$139.00 -
Out of stockOn Sale
SB Tactical SBA3 Adjustable Pistol Brace With Grid Defense Buffer Tube Kit - Sniper Gray
Sale: $119.95MSRP: $169.95SBA3 With Grid Defense Buffer Kit - Sniper Gray SB Tactical SBA3 Pistol Stabilizing Brace - Sniper Gray 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 -
Strike Industries AR-15 Lower Parts Kit No Fire Control Group
$60.95Strike Industries AR-15 Lower Parts Kit No Fire Control Group Enhanced Bolt Catch Strike Magazine Catch Enhanced Takedown Pin SI 60-90 Degree 3-in-1 Selector Shaft$60.95 -
Sylvan Arms Folding Stock Adapter Gen 4 - Right Hand
$199.99Sylvan Arms Folding Stock Adapter Gen 4 - Right Hand Compatible with most AR15 Standard 1-3/16" x 16 thread Lightweight and Corrosion-Resistant Right folding$199.99 -
TIMBER CREEK AR MAGAZINE RELEASE BUTTON - BLACK
$7.99AR MAGAZINE RELEASE BUTTON - BLACK Billet 6061-T6 aluminum Compatible with all Milspec lowers Manufactured by Timber Creek Outdoors Made in the USA Black Anodized Finish$7.99 -
UTG Model 4 Combat Ops S1 Stock Kit - Black
$72.97UTG Model 4 Combat Ops S1 Stock Kit - Black lack finish 6-position adjustable/collapsible Includes: extension tube" buffer" buffer spring" tear-drop ring & castle nut AR-15/M4 style stock$72.97 -
Out of stock
ATI Outdoors AR-15 X2 Pistol Grip - Black
$29.99ATI Outdoors AR-15 X2 Pistol Grip - Black Fits most AR-15 and AR-10's V2 Sure Grip Texture Specifically Engineered Grip Dimensions Rear Tang & Curved Base Scratchproof & Weatherproof$29.99 -
B5 Systems AR-15 Pistol Grip - Black
$20.00B5 Systems AR-15 Pistol Grip - Black Aggressive texture for increased retention. Accepts Battery Grip Plug. Made of Milspec material. Available in all standard colors.$20.00 -
B5 Systems Trigger Guard - FDE
$22.00B5 Systems Trigger Guard - FDE Made of 6061 aluminum. Milspec Type III anodized finish. Weight: 3.00 oz.$22.00 -
Battle Arms Development Enhanced Safety Selector
$16.00Battle Arms Development Enhanced Safety Selector AR15 Style Rifles and the ArmaLite,Inc.'s AR10® (Semi Auto). Single Side Safety Selector (0°-90° SEMI AUTO) Fit all Mil-Spec Dimensioned AR-15 Lower Receiver Black Phosphate...$16.00 -
Out of stockOn Sale
Grid Defense AR-9 80% Lower Receiver Without Fire/Safe Engravings - Raw
Sale: $74.99MSRP: $179.00Grid Defense AR-9 80% Lower Receiver - Raw Raw Aluminum Finish Machined from 6061 billet aluminum Compatible with any Glock style small frame pistol calibers Compatible with Glock pattern or style magazines Magazine release button and ejector...Sale: $74.99MSRP: $179.00 -
Grid Defense Pistol Stabilizing Fin - Tungsten Gray
$49.99Grid Defense Pistol Stabilizing Fin - Tungsten Gray -Constructed from Reinforced Polymer -Increases Weapon Control and Stability -Weighs 5.7oz -Fits Pistol Buffer Tube up to 1.25" (Not Included) -Finished in Tungsten Gray Cerakote$49.99 -
Out of stock
MAGPUL MOE CARBINE STOCK MIL-SPEC PINK
$39.95MAGPUL MOE CARBINE STOCK MIL-SPEC PINK 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...$39.95 -
Out of stock
Magpul Moe Plus Grip With Moe Stock - Black
$68.95Magpul MOE Plus AR Grip - Black AR15/M4 Pistol Grip Beavertail Backstrap Anti Slip Texture Reinforced Polymer Construction 25 Degree Angle Grip Weighs 3.4oz Made in the USA Magpul MOE Carbine Stock - Black Sloping cheek weld combines a slim profile...$68.95 -
Magpul MOE-K Grip AR15/M4 - FDE
$20.95Magpul MOE-K Grip - Flat Dark Earth Compact and Thin Minimalist Design Constructed from Reinforced Polymer More Angled Vertical Grip than Standard A2 Grip Aggressive TSP Texture Weighs 2.4oz Made in the USA$20.95 -
Odin Works XMR2 Extended Mag Release - Gen 2
$22.00Odin Works XMR2 Extended Mag Release - Gen 2 Compatible with BAD Lever. Will not work with anti-walk pins without modification to the XMR2 .1 oz (including paddle, button, and screws) Large surface area for quick magazine reloads Easy to...$22.00