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
XTech Tactical ATG AR15 Tactical Adjustable Grip - Black | Heavy Texture
$19.99XTech Tactical ATG AR15 Tactical Adjustable Grip - Black | Heavy Texture Simple Adjustment Precision Fit 3 Angles (17°, 25°, 33°) Hardware Included Made in USA$19.99 -
ATI Outdoors AR-15 TactLite Mil-Spec Stock - Black
$37.49ATI Outdoors AR-15 TactLite Mil-Spec Stock - Black Six position adjustable Mil-Spec stock Fits AR-15/AR-10 Firearms with Military Buffer Tube Buffer Tube not included TracLock System$37.49 -
ATI Outdoors TactLite GEN2 AR-15 Mil-Spec Stock - Black
$48.99ATI Outdoors TactLite GEN2 AR-15 Mil-Spec Stock - Black ATI Outdoors Item Number: C.2.10.2212 TactLite GEN2 Adjustable Stock with TracLOCK GEN2 System Eliminates Horizontal & Vertical Movement of the Stock on the Buffer...$48.99 -
B5 Systems Medium Length Collapsible Precision Stock - Black
$230.00B5 Systems Medium Length Collapsible Precision Stock - Black 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 -
Battle Arms Sabertube QD Lightweight Stock Kit - Black
$199.95Battle Arms Sabertube QD Lightweight Stock Kit - Black Mil-Spec carbine buffer and buffer spring compatible QD sling attachment point Made in the USA$199.95 -
FORTIS SLS FIFTY SAFETY SELECTOR - BLACK
$69.95FORTIS SLS FIFTY SAFETY SELECTOR - BLACK Precise Manufacturing Long Term Reliability Durable Construction$69.95 -
Out of stock
Magpul PMAG 30rd Engraved .223/5.56 Magazine - Black
$30.95Magpul PMAG Gen M2 MOE 30rd .223/5.56 Magazine - Black 30-round reliability with no stoppages Flared floorplate aids magazine handling and disassembly and is slim enough for use with many double and triple pouches The anti-tilt, self-lubricating...$30.95 -
Magpul PSR GEN3 Precision Adjustable Stock - Black
$259.95Magpul PSR GEN3 Precision Adjustable Stock - Black Machined aluminum LOP and Cheek Piece adjustment knobs Steel adjustment shafts finished with Melonite Bottom M-LOK slots for sling or monopod$259.95 -
MIL-SPEC PISTOL BUFFER TUBE - BLACK
$20.00MIL-SPEC PISTOL BUFFER TUBE - BLACK Made From: Forged 7075 aluminum Hard Coat Black Anodized Finish **Buffer, Castle Nut, End Plate Not Included**$20.00 -
Mission First Tactical Engage AR Pistol Grip V2 - Black
$19.99Mission First Tactical AR Pistol Grip V2 - Black Black finish Version 2 No finger grooves 15 degree angle Tab covers the receiver gaps$19.99 -
Strike Industries AR-15 Modular Bolt Catch
$34.95Strike Industries AR-15 Modular Bolt Catch Modular design to easily change between different bolt catch deigns 4 different buttons included (Standard, Oversized, Left Extended and Right Extended) Compatible with Mil-Spec AR-15 lower receivers$34.95 -
Ergo Grip Sure Grip Tactical Deluxe - Black
$39.99Ergo Grip Sure Grip Tactical Deluxe - Black Design allows installation on both .223 and .308 AR-15/AR-10 type receivers. Ergonomically correct finger grooves Integrated rear upper extension supports the web of your hand. Overmolded SUREGRIP®...$39.99 -
Strike Industries PDW Stock - Black
$274.95Strike Industries PDW Stock - Black Ambidextrous, push button deployment Ergonomic, compound curved stock Lightweight Compatible with standard bolt carriers No non-standard take down procedures Fits AR Rifles$274.95 -
F.A.B. Defense Gradus AR Pistol Grip - Black
$29.00F.A.B. Defense Gradus AR Pistol Grip - Black Ergonomic AR Grip$29.00 -
Strike Industries Ambidextrous Safety Selector - Black
$65.95Strike Industries Strike Switch Safety Selector - Black Ambidextrous Ergonomic Shape Modular Assembly Precision Machined Strike 60/90 Option Compatible with AR-15 Style Lowers$65.95