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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Magpul MOE Plus Grip - Gray
$24.95Magpul MOE Plus Grip - Gray Replacement for AR15/M4 pistol-grip One-piece reinforced polymer construction with wrap-around rubber backstrap$24.95 -
Magpul MOE-K2 AK Grip - Black
$20.95Magpul MOE-K2 AK Grip - Black Drop-in upgrade for AK47/AK74 pistol grips More vertical grip angle than typical AK designs Aggressive TSP texture for positive weapon control$20.95 -
Mil-Spec Carbine Buffer Tube
$25.00 - $30.00Mil-Spec Carbine Buffer Tube Made in the USA Compatible with M4 Type Butt Stocks 6 Position Machined from 7075-T6 Aluminum Weight: 3.6oz Available in Black Anodize or Cerakote Finish$25.00 - $30.00 -
Out of stockOn Sale
Odin Works AR-15 Adjustable Buffer - Heavy
Sale: $44.00MSRP: $49.00Odin Works AR-15 Adjustable Buffer - Heavy Heavy Buffer made from stainless steel Weights included for different weight combinations AR15 comes with 3 aluminum, 3 stainless steel and 1 tungsten Weight: 3.7oz - 5.8oz)Sale: $44.00MSRP: $49.00 -
Odin Works Bolt Catch - Black
$20.00Odin Works Bolt Catch - Black Fits AR-15 platform rifles Black Anodized Finish$20.00 -
Out of stock
Phase5 Hex-2 AR15 Pistol Buffer Tube - Red
$59.95Phases Hex-2 AR15 Pistol Buffer Tube - Red Model: Hex-2Product Type: Buffer TubeFinish/Color: RedFit: AR-15 PistolAccessories: Includes Castle Nut, End Plate, Foam PadDescription: Specifically designed to fit SIG SB15 Stabilizing Brace$59.95 -
Phase5 Mag Release Button - Black
$7.99Phase5 Mag Release Button - Black 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 -
On Sale
PHASE5 OVERSIZED MAGAZINE RELEASE BLUE
Sale: $19.99MSRP: $21.99PHASE5 OVERSIZED MAGAZINE RELEASE BLUE 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 billet aluminum for...Sale: $19.99MSRP: $21.99 -
RADIAN WEAPONS AR15 AMBIDEXTROUS TALON SAFETY SELECTOR 4-LEVER KIT - FDE
$87.45AR15 AMBIDEXTROUS TALON SAFETY SELECTOR 4-LEVER KIT - FDE 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...$87.45 -
Out of stock
TIMBER CREEK RECEIVER EXTENSION PLATE - PURPLE
$69.00TIMBER CREEK RECEIVER EXTENSION PLATE - PURPLE Manufactured by Timber Creek Outdoors Made in the USA Fits any Milspec buffer tube Variety of colors$69.00 -
$5.99 -
B5 Systems SOPMOD Stock - Black
$100.00B5 Systems SOPMOD Stock - Black Ergonomic cheek weld. Color-matched steel hardware. Overmolded steel anti-rotational QD sling mounts. Fixed sling mounts. No slip cushioned butt pad. Suregrip stock latch. Dual water resistant storage compartments...$100.00 -
Battle Arms Adjustable AR-15 Pistol Grip - Black
$25.00Battle Arms Adjustable AR-15 Pistol Grip - Black 17 degree: Modern shooting techniques, “elbows in” stance 25 degree: Great “middle option” 33 degree: “A2 grip” originally seen 1960’s with “elbows...$25.00 -
Battle Arms Development AR-15 Aluminum Takedown Pins - Purple
$29.95Battle Arms Development AR-15 Aluminum Takedown Pins - Purple Low Profile Pin Heads - Low drag and never in the way. Lower profile than mil-spec pin heads Ambidextrous Safety Compatible Bullet Tip Guide$29.95 -
Battle Arms Development EMMR Large Enhanced Modular Magazine Release - Silver
$23.95Battle Arms Development EMMR Large Enhanced Modular Magazine Release - Silver BAD-EMMR-L (Enhanced Modular Magazine Release - Large Finger Pad) for the AR15/AR10. Precision CNC Machined for billet 7075-T6 Aluminum, the BAD-EMMR features,...$23.95 -
Black Rain Ordnance 3.5 Pound Pull Trigger
$234.99Black Rain Ordnance 3.5 Pound Pull Trigger 3.5Lb Trigger Pull Drop-in Single Stage$234.99 -
Bravo Company Gunfighter Mod 0 Adjustable Stock - FDE
$60.00Bravo Company BCMGUNFIGHTER Mod 0 Adjustable Stock - FDE The strongest light-weight polymer stock available for your mil-spec receiver 2 different types of ambidextrous sling mounting option Fits Mil-Spec Buffer Tube$60.00 -
BRAVO COMPANY GUNFIGHTER SOPMOD 0 ADJUSTABLE STOCK - FDE
$64.00BRAVO COMPANY GUNFIGHTER SOPMOD 0 STOCK - FDE The strongest light-weight polymer stock available for your mil-spec receiver extension More pronounced cheekweld-SOPMOD type (widebody)$64.00 -
Out of stock
CMC SINGLE STAGE CURVED TRIGGER - GOLD
$235.00CMC SINGLE STAGE CURVED TRIGGER - GOLD Single Stage Drop-In Curved Trigger 3.5 lbs. Trigger Pull Self-Contained One-Piece Assembly Anti-Walk Pin Set Included 8620 Alloy Steel and S7 Tool Steel Construction Fits MIL-SPEC AR-15/AR-10 Style Rifles$235.00 -
Out of stock
Grid Defense AR-10 80% Billet Lower Receiver With Optional Engravings
$75.00 - $100.00Grid Defense AR-10 80% Lower Receiver With Optional Engravings Machined from 6061-T6 Billet Aluminum Made in house in the USA Flared and Broached Magwell Available in Black Anodize, Raw Aluminum, and Cerakote Finishes Optional Fire/Safe...$75.00 - $100.00