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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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 -
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 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 -
Out of stock
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 -
Out of stock
Hogue Monogrip Kit for AR-15 - Black
$29.95Hogue Monogrip Kit for AR-15 - Black Material: OverMolded® rubber with finger grooves Texture: Cobblestone™ Color: Black Weight: 2.4 oz Precision fit for AR-15/ M16 Rifles Gentle palm swells fit comfortably in...$29.95 -
LUTH-AR OVERSIZED SAFETY SELECTOR - AR15
$19.95LUTH-AR OVERSIZED SAFETY SELECTOR - AR15 Large Thumb Pad Extended Lever 8620 Steel Manganese Phosphate Finish$19.95 -
Out of stock
MAGPUL MBUS SIGHTS WITH MOE + GRIP
$121.45MAGPUL MBUS GEN II FRONT AND REAR SIGHT SET INCLUDES: Magpul Industries MAG247 : Mbus Gen II Front Flip Sight Blk (adjustment tool is included) Magpul Industries MAG248 : Mbus Gen II Rear Flip Sight Blk MAGPUL MOE PLUS AR...$121.45 -
On Sale
Magpul MOE K Grip - Gray
Sale: $18.85MSRP: $20.95Magpul MOE K Grip - Gray More vertical grip angle than standard A2 grips One-piece reinforced polymer constructionSale: $18.85MSRP: $20.95 -
Magpul MOE Polymer Trigger Guard - FDE
$9.95Magpul MOE Polymer Trigger Guard - FDE Constructed from Advanced Polymer Compatible with the AR15/M4 Platform All Mounting Hardware Included Made in the USA Easily installed without the use of specialized tools Ergonomic and enlarged...$9.95 -
Out of stock
MIL-SPEC PISTOL BUFFER TUBE - PINK CHAMPAGNE
$25.00MIL-SPEC PISTOL BUFFER TUBE - Pink Champagne Made From: Forged 7075 aluminum Pink Champagne Cerakote Finish **Buffer, Castle Nut, End Plate Not Included**$25.00 -
On 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 -
Rise Armament Super Sporting Trigger Back The Blue Edition
$159.00Rise Armament Super Sporting Trigger Back The Blue Edition Each purchase benefits C.O.P.S. Available with a curved trigger blade Nickel boroncoated internal parts for improved performance Unique blue housing with distressed Back the Blue...$159.00