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
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...Sale: $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...$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...$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...$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...$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...$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...$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...$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 -
Out of stock
2A Armaments Builder Series Slotted Trigger Guard
$14.992A Armaments Builder Series Slotted Trigger Guard Precise Manufacturing Long Term Reliability Durable Construction Black Anodized Finish For AR-15 Rifles$14.99 -
Out of stock
Adaptive Tactical EX Lite Stock - Black
$34.99Adaptive Tactical EX Lite Stock - Black Only compatible with Mil-Spec sized extension tubes Covered take down pin makes installation and removal easier and eliminates discomfort M4-style stock...$34.99 -
Out of stock
AR Enhanced Ambidextrous Safety Selector - Black
$20.99AR Enhanced Ambidextrous Safety Selector - Black For Left or Right-Handed Shooters Replaces Existing Safety Lever Easy-To-Operate Safety Lever on Both Sides of The Receiver Does Not Interfere...$20.99 -
Out of stock
AR Enhanced Ambidextrous Safety Selector - Gold
$23.99AR Enhanced Ambidextrous Safety Selector - Gold For Left or Right-Handed Shooters Replaces Existing Safety Lever Easy-To-Operate Safety Lever on Both Sides of The Receiver Does Not Interfere...$23.99