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
Grid Defense AR-15 80% Lower Receiver Without Fire/Safe Engravings - Raw
Sale: $39.99MSRP: $129.00Grid Defense AR-15 80% Lower Receiver - Raw Machined from 7075 Forged Aluminum Made in house in the USA Flared and Broached Magwell Raw Aluminum Finish Does not have Fire/Safe Makings Can be used for Multiple Calibers .223/5.56/300BLK/9mm/7...Sale: $39.99MSRP: $129.00 -
Out of stock
Adaptive Tactical Lightweight Tactical Grip - Black
$17.99Adaptive Tactical Lightweight Tactical Grip - Black AR-15/M-16/M4 Pistol Grip Constructed from High Grade Reinforced Polymer One Piece Construction Non-Conductive Ergonomic Aggressive Design Lightweight and...$17.99 -
Out of stockOn Sale
Grid Defense AR Lower Takedown/Pivot Pin Spring and Detent Replacements
Sale: $4.49MSRP: $9.99Grid Defense AR Lower Takedown/Pivot Pin Spring and Detent Replacements Machined from quality corrosion resistant stainless steel Made in the U.S.A. AR-15 and AR-15 3x Takedown / Pivot Pin Detents 2x Takedown / Pivot Pin Detent SpringsSale: $4.49MSRP: $9.99 -
Out of stock
Magpul MOE AR15/M4 Pistol Grip - OD Green
$20.95Magpul MOE AR15/M4 Pistol Grip - OD Green Made in U.S.A. Features Replacement for AR15/M4 pistol-grip* One-piece reinforced polymer construction Beavertail backstrap for enhanced ergonomics Positive anti-slip texture Includes a basic grip...$20.95 -
Magpul CTR Stock Mil-spec - Black
$64.95Magpul CTR Carbine Stock - Black FEATURES Mounts on mil-spec sized carbine receiver extension tube (not included) from manufacturers such as Colt, Armalite, S&W, LMT, and others (please see the note below) Supplemental friction lock...$64.95 -
Out of stock
STRIKE INDUSTRIES ULTRA LIGHT PIVOT / TAKEDOWN PINS - FDE
$16.95Strike Industries Ultra Light Pivot/Takedown pins - FDE Extended Grasping Service Extended Pivot Pin / 1.31" Length Extended Takedown Pin / 1.08" length Ultra light and Ultra Strong Construction For AR15 Lowers FDE Finish$16.95 -
On Sale
Tactical Dynamics Skeleton Stock - Burnt Bronze
Sale: $70.00MSRP: $109.00Tactical Dynamics Skeletonized Stock Finished in Burnt Bronze Cerakote Made in the USA Fits: Mil Spec Buffer Tube Made From: Aluminum 6061-T6 Specs 6 3/4" Long 5 1/4" Contact Area 1 1/4" Wide 9.65ozSale: $70.00MSRP: $109.00 -
Out of stock
Magpul MOE Trigger Guard - OD Green
$8.95Magpul MOE Trigger Guard - OD Green Constructed from Advanced Polymer Compatible with the AR15/M4 Platform All Mounting Hardware Included Made in the USA$8.95 -
On Sale
Tactical Dynamics Skeleton Stock - FDE
Sale: $56.00MSRP: $109.00Tactical Dynamics Skeleton Stock Finished in Magpul Flat Dark Earth 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 -
CMC AR-15 Match Trigger Flat Bow - 3.5LB
$189.99CMC AR-15 FLAT MATCH TRIGGER FEATURES Single Stage AR15 Match Trigger Multiple trigger pull weights Ultra-crisp trigger with no feel of creep prior to hammer release Trigger has glass-smooth break with no feel of grittiness Minimal lock time is...$189.99 -
Out of stockOn Sale
SB Tactical SBA3 Adjustable Pistol Brace With Grid Defense Buffer Tube Kit - FDE
Sale: $119.95MSRP: $169.95SBA3 With Grid Defense Buffer Kit - FDE SB Tactical SBA3 Pistol Stabilizing Brace - Flat Dark Earth 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 stock
Grid Defense Lower Pistol Build Kit Nickel Boron
$99.00Ghost Firearms Lower Pistol Build Kit Nickel Boron Nickel Boron Trigger Group A2 Grip Buffer Retainer Pin Buffer Retainer Spring Trigger Guard Safety Selector Bolt Catch Spring Detent Spring Bolt Catch...$99.00 -
Adaptive Tactical EX Performance Stock - FDE
$59.99Adaptive Tactical EX Performance Stock - FDE Designed for owner installation Covered take down pin makes installation and removal easier and eliminates discomfort M4-style stock with adjustable length-of-pull Easy to reach rapid adjust...$59.99 -
On Sale
Tactical Dynamics Skeleton Stock - Tungsten Gray
Sale: $56.00MSRP: $109.00Tactical Dynamics Skeleton Stock Finished in Tungsten Gray 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 -
Elite Trigger Guard
$24.99Premium ELITE Trigger Guard This 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 purpose. Being made from...$24.99 -
SELECTOR DETENT SPRING - AR15
$1.99DETENT SELECTOR SPRING Compatible with AR15/M4 Lower Receivers American Made$1.99 -
Creed Monarch AR15 Heavy Carbine Buffer
$23.00AR15 H1 Carbine Buffer Made in the USA Machined from Top Quality Material Weighs 3.8oz Manufactured by Creed Monarch$23.00 -
MAGPUL MOE STOCK MILSPEC - Flat Dark Earth
$44.95Magpul Moe Stock MilSpec - Flat Dark Earth Made in the USA Weighs 8.0oz Length - 6.9" LOP Adjustment Range - 3.3 inch Sling Mounts (Rear/Bottom 1.25" Sling Loops|Toe-Lanyard Hole for Custom Para Cord Rigs) Compatible with Magpul ASAP/ASAP QD and...$44.95 -
Out of stockOn Sale
SB Tactical SBA4 Adjustable Pistol Brace With Grid Defense Buffer Tube Kit - Black
Sale: $119.95MSRP: $169.95SBA4 with Grid Defense Buffer Kit - Black 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 -
On Sale
Grid Defense Pistol Grip Screw and Washer Replacement
Sale: $2.95MSRP: $9.99Grid Defense Pistol Grip Screw and Washer ReplacementSale: $2.95MSRP: $9.99