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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Timney Triggers Skeleton 3 Lbs AR-15 Trigger
$314.99Timney Triggers Skeleton 3 Lbs AR-15 Trigger Single-Stage Improved Accuracy Drop-in Design No Adjustments Needed$314.99 -
Out of stock
UTG Pro AR Pistol Extension Tube Kit - Black
$47.97UTG Pro AR Pistol Extension Tube Kit - Black 1.2" OD Receiver Extension Tube Compatible with AR15 Lower Receivers Precision Machined from 7075-T6 Aircraft Grade Aluminum with a Dry Film Lube Coated Interior for Smoother and More reliable...$47.97 -
Wilson Combat AR-15 Two Stage H2 Trigger
$189.95Wilson Combat AR-15 Two Stage H2 Trigger 4.5-5Lb Pull Fits AR-15$189.95 -
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 -
AR-15 Mil-Spec Carbine Length Buffer Spring
$5.99AR-15 Carbine Length Buffer Spring Weight - 1.9 oz Length - 10.75" Solid Steel Construction Corrosion Resistant Matte Black Finish$5.99 -
Out of stock
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 AR-15 Pistol Grip - FDE
$20.00B5 Systems AR-15 Pistol Grip - FDE Aggressive texture for increased retention. Accepts Battery Grip Plug. Made of Milspec material. Available in all standard colors.$20.00 -
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 -
B5 Systems SOPMOD Stock - FDE
$120.00B5 Systems SOPMOD Stock - FDE 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...$120.00 -
Battle Arms Development AR-15 Ambidextrous Safety Selector - Blue
$65.00Battle Arms Development AR-15 Ambidextrous Safety Selector - Blue Ambidextrous Controls Reversible 0- 60 or 0- 90 Option Lightweight, Billet 7075-T6 Aircraft Grade Aluminum Ergonomic Lever Design for Positive Purchase Anodized Finish, Blue$65.00 -
Battle Arms Development AR-15 Ambidextrous Safety Selector - Purple
$65.00Battle Arms Development AR-15 Ambidextrous Safety Selector - Purple Ambidextrous Controls Reversible 0- 60 or 0- 90 Option Lightweight, Billet 7075-T6 Aircraft Grade Aluminum Ergonomic Lever Design for Positive Purchase Anodized Finish, Purple$65.00 -
Battle Arms Development AR-15 Ambidextrous Safety Selector - Red
$65.00Battle Arms Development AR-15 Ambidextrous Safety Selector - Red Ambidextrous Controls Reversible 0- 60 or 0- 90 Option Lightweight, Billet 7075-T6 Aircraft Grade Aluminum Ergonomic Lever Design for Positive Purchase Anodized Finish, Red$65.00 -
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 -
F.A.B. Defense Mag-well Grip and Funnel - FDE
$26.00F.A.B. Defense Mag-well Grip and Funnel - FDE Polymer Finger Grooves for a comfortable grip Fits AR-15$26.00 -
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 Buffer Tube End Plate
$10.99Mil-Spec Buffer Tube End Plate Steel Construction Mag Phosphate Finish$10.99 -
Mil-Spec Carbine Buffer - 3.0oz
$15.99Mil-Spec Carbine Buffer Weight - 3.0 oz Length - 3.25" Matter Black Finish Drop-In Installation Designed for AR-15$15.99