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
FAILZERO DROP IN TRIGGER GROUP - FLAT
$184.99FAILZERO TRIGGER GROUP - FLAT KEY FEATURES: Single-stage trigger system 3.5-lb. pull weight Clean break with a short reset Comfortable, flat trigger Unit weight: 2.6 oz. CNC machined from high-grade, heat-treated tool steel and...$184.99 -
Fortis Manufacturing AR-15 Takedown Pins - Rose Gold/Case Hardened
$22.95Fortis Manufacturing AR-15 Takedown Pins - Rose Gold/Case Hardened Mil-spec size tolerance from .247-.2485 Comes in either black nitride coating or case hardened finish Lightweight at 0.34 oz combined Material 17-4 Stainless Steel Made in the USA$22.95 -
Ghost Firearms Mil-Spec Lower Parts Kit - 5 Pack
$299.95Ghost Firearms Mil-Spec Lower Parts Kit - 5 Pack Trigger Group A2 Grip Buffer Retainer Pin Buffer Retainer Spring Trigger Guard Safety Selector Bolt Catch Spring Detent Spring Bolt Catch Plunger Bolt...$299.95 -
Out of stockOn Sale
Grid Defense AR-15 80% Lower Receiver With Fire/Safe Engravings 10 Pack - Raw
Sale: $434.99MSRP: $1,200.00Grid Defense AR-15 80% Lower Receiver 10 Pack - Raw Includes 10 Raw 80% Lower Receivers With Fire/Safe Markigs Machined from 7075 Forged Aluminum Made in house in the USA Flared and Broached Magwell Raw Aluminum Finish Does not have...Sale: $434.99MSRP: $1,200.00 -
Magpul MOE K-2 AR Pistol Grip - Gray
$20.95Magpul MOE K-2 AR Pistol Grip - Gray Replacement for AR15/M4 pistol-grip One-piece reinforced polymer construction More vertical grip angle than A2 grips Aggressive TSP texture Weight: 2.9oz Thickness: 1.2" Height: 4.1" Grip Angle: 17...$20.95 -
Phase5 Mag Release Button - Blue
$7.99Phase5 Mag Release Button - Blue Fits AR 5.56/.223 and 7.62/.308 Receivers 6061-T6 Billet Aluminum Anodized Finish$7.99 -
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 Weapon Systems Ambidextrous 90 Degree Safety Selector - Blue
$49.99Phase5 Weapon Systems Ambidextrous 90 Degree Safety Selector - Blue Fits AR-15 and AR-10 / LR-308 6061-T6 Billet Aluminum Ambidextrous Wide Levers$49.99 -
Phase5 Weapon Systems Ambidextrous 90 Degree Safety Selector - Grey
$49.99Phase5 Weapon Systems Ambidextrous 90 Degree Safety Selector - Grey Fits AR-15 and AR-10 / LR-308 6061-T6 Billet Aluminum Ambidextrous Wide Levers$49.99 -
PHASE5 WINTER TRIGGER GUARD - RED
$25.00PHASE5 WINTER TRIGGER GUARD RED Winter Trigger Guard Lightweight Manufactured by Phase 5 Weapon Systems Made In The USA$25.00 -
Out of stock
SKELETONIZED ELITE TRIGGER GUARD - ZOMBIE GREEN
$25.99PREMIUM SKELETONIZED ELITE TRIGGER GUARD - ZOMBIE GREEN This Skeletonized 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...$25.99 -
STRIKE INDUSTRIES FANG BILLET TRIGGER GUARD - BLUE
$21.95STRIKE INDUSTRIES FANG BILLET TRIGGER GUARD - BLUE Contents:- 1x Aluminum Trigger Guard- 4x M3 Hex Screw- 1x Warning card Features:- Aircraft grade aluminum construction- Magazine reload assist- Cleaner, faster reloads- Lightweight (.4 oz with...$21.95 -
TIMBER CREEK RECEIVER EXTENSION PLATE - FLAT DARK EARTH
$69.99TIMBER CREEK RECEIVER EXTENSION PLATE - FLAT DARK EARTH Drop in replacement Fits any milspec buffer tube Lightweight Made in the USA$69.99 -
Out of stock
2A Armaments Builder Series Solid Trigger Guard
$14.992A Armaments Builder Series Solid Trigger Guard Precise Manufacturing Long Term Reliability Durable Construction Black Anodized Finish For Ar-15 Rifles$14.99 -
Out of stock
ATI Outdoors AR-15 X1 Pistol Grip - Black
$29.99ATI Outdoors AR-15 X1 Pistol Grip - Black Fits AR-15/AR-10 Fits the Ruger 22 Charger Pistol with AR-15 Style Grip DuPont(R) Extreme Temperature Glass Reinforced Polymer Scratch & weatherproof$29.99 -
B5 Systems Mil-Spec Stock - FDE
$62.00B5 Systems Mil-Spec Stock - FDE Ergonomic cheek weld. Color-matched steel hardware. Overmolded steel anti-rotational QD sling mounts. Fixed sling mounts Internal tensioners. No slip cushioned butt pad. Suregrip stock latch. Made of Milspec...$62.00 -
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 -
Elftmann Tactical Adjustable Trigger - Straight
$139.00Elftmann Tactical Adjustable Trigger - Straight Fits any and all AR platforms Incremental Adjustment Knob Drop-Safe Adjustable from 2 3/4lbs to 4lbs without removing from lower Patented Double-Double torsion hammer spring Short pull and reset...$139.00 -
F.A.B. Defense GL-Core S AR-15 Buttstock - Black
$55.99F.A.B. Defense GL-Core S AR-15 Buttstock - Black Collapsible Rubber Buttpad Small and Compact Design Fits Mil-Spec and Commercial Buffer Tubes$55.99 -
Geissele Automatics Maritime Bolt Catch
$29.00Geissele Automatics Maritime Bolt Catch Increased Surface Area Aggressive Checkering Extended Controls$29.00