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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B5 Systems Medium Length Collapsible Precision Stock - FDE
$230.00B5 Systems Medium Length Collapsible Precision Stock - FDE Adjustable cheekweld and buttpad with precision dials. Mounting slots for Accessory Cheekpiece. 12 internal tensioners. Color matched machined hardware. Fixed sling mounts. Steel...$230.00 -
Bravo Company Mod 0 Sopmod Stock Kit - FDE
$124.00Bravo Company Mod 0 Sopmod Stock Kit - FDE BCM 7075T6 Mil-Spec Receiver Extension Locking Nut M4 Mil-Spec Carbine Action Spring Carbine Buffer BCM QD Swivel Mount End Plate$124.00 -
Out of stock
Bravo Company Trigger Guard Mod 0 - Black
$8.00Bravo Company Trigger Guard Mod 0 - Black Ergonomically correct shape and contour No sharp edges, Compatible with "duck-billed" grips Made of impact resistant polymer$8.00 -
Daniel Defense AR15 Lower Parts Kit
$115.00Daniel Defense AR15 Lower Parts Kit - Black Mil-Spec AR15 Lower Parts Kit Compatible with Multiple Calibers A2 Pistol Grip Magpul Trigger Guard Made in the USA Daniel Defense Lower Parts Kit$115.00 -
Out of stock
Ergo MSR Compact AR-15 Pistol Grip - FDE
$17.99Ergo MSR Compact AR-15 Pistol Grip - FDE MSR Upgraded Pistol Grip Aggressive Texturing Integral rear upper extension supports the web of the shooters hand Mounting hardware included$17.99 -
Out of stock
F.A.B. Defense GL-Core CP AR-15 Buttstock - Tan
$81.99F.A.B. Defense GL-Core CP AR-15 Buttstock - Tan Tan finish Interchangeable buffer tube adapters for a tight fit on Mil-Spec and Commercial buffer tubes Additional" adjustable Cheek-Rest$81.99 -
F.A.B. Defense Gradus AR Pistol Grip - FDE
$29.00F.A.B. Defense Gradus AR Pistol Grip - FDE Ergonomic AR Grip$29.00 -
On Sale
Grid Defense Lower Receiver Spring Replacement Kit
Sale: $10.95MSRP: $13.95Grid Defense Lower Receiver Spring Replacement Kit Take Down Pin Detent Springs (2) Buffer Retainer Spring Hammer Spring trigger Spring Disconnect Spring Bolt Catch Spring Magazine Catch Spring Selector Detent SpringSale: $10.95MSRP: $13.95 -
Out of stock
HEXMAG AR15 ADVANCED TACTICAL GRIP - BLACK
$29.99HEXMAG AR15 ADVANCED TACTICAL GRIP - BLACK Fits AR-15 and AR-10 platforms 17 for pistols/SBRs" 25 degree for standard angle or 33 degree for long range Made from fiber-reinforced polymer HexMag's AR-15 Advanced Tactical Pistol Grip features a...$29.99 -
Magpul CTR Mil-Spec Stock - Gray
$64.95Magpul CTR Mil-Spec Stock - Gray Mounts on milspec-sized receiver extension tube Shielded release latch Removable butt-pad Sling mounts$64.95 -
Magpul STR Carbine Stock - Black
$84.95Magpul STR Carbine Stock Compatible with Milspec Carbine Buffer Tube AR15/M4 Butt Stock Reinforced Polymer Construction Improved Cheek Weld Two Water Resistant Battery Tubes QD Sling Mount 0.30" Thick Butt Pad Made in the USA$84.95 -
Out of stock
Phase5 Mag Release Button - Red
$7.99Phase5 Mag Release Button - Red Fits AR 5.56/.223 and 7.62/.308 Receivers 6061-T6 Billet Aluminum Anodized Finish The Phase 5™ PMR is a CNC machined 6061-T6 billet aluminum magazine release button. Easy to install, the PMR is a drop in...$7.99 -
PHASE5 OVERSIZED MAGAZINE RELEASE RED
$21.99PHASE 5 MAG RELEASE - OVERSIZED MAGAZINE RELEASE Features: Larger contact surface than a Mil-Spec magazine release button Ergonomic pocket on surface of paddle for your finger CNC machined from lightweight 6061-T6...$21.99 -
Out of stock
RADIAN WEAPONS AR15 AMBIDEXTROUS TALON SAFETY SELECTOR 2-LEVER KIT - TUNGSTEN GRAY
$49.95AMBI TALON SAFETY SELECTOR 2-LEVER KIT - TUNGSTEN GRAY The Talon™ ambidextrous safety selector is a modular design that can be installed as a standard 90° or as a 45° short throw by simply rotating the shaft 180° inside the lower...$49.95 -
Out of stock
RADIAN WEAPONS RAPTOR AMBI TALON SAFETY SELECTOR 2-LEVER KIT - NP3
$74.95AMBI TALON SAFETY SELECTOR 2-LEVER KIT - NP3 The Talon™ ambidextrous safety selector is a modular design that can be installed as a standard 90° or as a 45° short throw by simply rotating the shaft 180° inside the lower receiver...$74.95 -
Radian Weapons Talon Ambidextrous Safety Selector - Flat Dark Earth
$64.95Radian Weapons Talon Ambidextrous Safety Selector - Flat Dark Earth Short & Long Lever Billet Aircraft Grade Aluminum Center Shaft Machined from Hardened Steel AR15/AR10 Compatible$64.95 -
Out of stock
TACTICAL DYNAMICS SKELETON GRIP - PERIWINKLE
$79.00Tactical Dynamics Skeleton Grip - Periwinkle Machined from 7075-T6 Aluminum Durable and Lightweight Compatible with AR15/AR10 Platforms Unique Design Made in the USA Periwinkle Cerakote Finish$79.00 -
TIMBER CREEK ENFORCER AR PISTOL GRIP - FLAT DARK EARTH
$99.99ENFORCER AR PISTOL GRIP - FLAT DARK EARTH Cerakote FDE Pistol Grip Weighs 4oz. Manufactured by Timber Creek Outdoors, Inc.$99.99 -
Out of stock
$99.99 -
Wilson Combat Single Stage Trigger
$189.95Wilson Combat Single Stage Trigger 5-5.75 Lb pull Fits AR-15 style rifles$189.95