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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Battle Arms Development EMMR Large Enhanced Modular Magazine Release - Black
$23.95Battle Arms Development EMMR Large Enhanced Modular Magazine Release - Black BAD-EMMR-L (Enhanced Modular Magazine Release - Large Finger Pad) for the AR15/AR10. Precision CNC Machined for billet...$23.95 -
Battle Arms Development Enhanced Magazine Catch - Black
$9.00Battle Arms Development Enhanced Magazine Catch - Black SKU:Â BAD-EMC-IC Type:Â Magazine Release Model:$9.00 -
Bravo Company AR-15 PNT Trigger Assembly - Nickel
$70.00Bravo Company AR-15 PNT Trigger Assembly - Nickel PNT (Polished Nickel Teflon) parts feature micro polished contact surfaces low-friction Clean break and zero grittiness$70.00 -
Out of stock
F.A.B. Defense GCCP AR-15 Buttstock - Black
$88.00F.A.B. Defense GCCP AR-15 Buttstock - Black Collapsible Rubber Buttpad Cheek Riser Small Compact Design Fits Mil-Spec and Commercial Tubes Â$88.00 -
Out of stock
Ghost Grip - Pink Champagne
$19.99The Ghost Grip is designed for Made In the USA Made From: reinforced Plastic composite Slim Lightweight Design Incorporates finger groves to insure a tight and comfortable hold Ghost "G" Engraved...$19.99 -
Out of stockOn Sale
Grid Defense AR-15 80% Lower Receiver Without Fire/Safe Engravings 3 Pack - Raw
Sale: $145.00MSRP: $390.00Grid Defense AR-15 80% Lower Receiver 3 Pack - Raw Includes 3 Raw No Fire/Safe 80% Lower Receivers Machined from 7075 Forged Aluminum Made in house in the USA Flared and Broached Magwell Raw...Sale: $145.00MSRP: $390.00 -
Out of stock
Magpul MOE AR Grip - Pink
$19.95Magpul MOE Grip - Pink AR15/M4 Pistol Grip Flat Dark Earth Reinforced Polymer Construction Beavertail Backstrap Anti Slip Texture 25 Degree Angle Grip Weighs 2.8oz$19.95 -
Out of stock
Mil-Spec Lower Parts Kit Nickel Boron
$79.00Mil-Spec Lower Parts Kit Nickel Boron Includes: Nickel Boron Trigger Group A2 Grip Buffer Retainer Pin Buffer Retainer SpringÂ$79.00 -
Mil-Spec Pistol Buffer Tube
$20.00Build a clean, compliant, and lightweight AR pistol setup with the Mil-Spec Pistol Buffer Tube. Precision-machined in the USA from heavy-duty 7075-T6 aluminum, this smooth receiver extension provides...$20.00 -
Out of stock
Noveske STS 60 Degree Safety Selector
$37.95Noveske STS 60 Degree Safety Selector Nitride Finish 60 Degree Throw Machined Stainless Construction Tuned for Standard Actuation Force from Safe & Smooth Return from Fire$37.95 -
Out of stock
RADIAN WEAPONS AR15 AMBIDEXTROUS TALON SAFETY SELECTOR 4-LEVER KIT - NP3
$102.45AR15 AMBIDEXTROUS TALON SAFETY SELECTOR 4-LEVER KIT - NP3 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...$102.45 -
TIMBER CREEK AR MAGAZINE RELEASE BUTTON - BLACK
$7.99AR MAGAZINE RELEASE BUTTON - BLACK Billet 6061-T6 aluminum Compatible with all Milspec lowers Manufactured by Timber Creek Outdoors Made in the USA Black Anodized Finish$7.99 -
UTG Model 4 Combat Ops S1 Stock Kit - Black
$72.97UTG Model 4 Combat Ops S1 Stock Kit - Black lack finish 6-position adjustable/collapsible Includes: extension tube" buffer" buffer spring" tear-drop ring & castle nut AR-15/M4 style stock$72.97 -
Armaspec AR-15 Stainless Steel Takedown/Pivot Pins
$15.99Armaspec AR-15 Stainless Steel Takedown/Pivot Pins Includes Takedown and Pivot pins that work with an AR15, M16 or M4 Â Ultra-Lightweight Built-in Dimples for easy pushing in Bullet tip and...$15.99 -
Out of stock
ATI Outdoors AR-15 X2 Pistol Grip - Black
$29.99ATI Outdoors AR-15 X2 Pistol Grip - Black Fits most AR-15 and AR-10's V2 Sure Grip Texture Specifically Engineered Grip Dimensions Rear Tang & Curved Base Scratchproof &a$29.99 -
B5 Systems Trigger Guard - FDE
$22.00B5 Systems Trigger Guard - FDE Made of 6061 aluminum. Milspec Type III anodized finish. Weight: 3.00 oz.$22.00 -
Battle Arms Development Enhanced Safety Selector
$16.00Battle Arms Development Enhanced Safety Selector AR15 Style Rifles and the ArmaLite,Inc.'s AR10® (Semi Auto). Single Side Safety Selector (0°-90° SEMI AUTO) Fit all Mil-Spec Dimensioned AR-15...$16.00 -
Out of stock
Daniel Defense AR15 Lower Parts Kit
$115.00Daniel Defense AR15 Lower Parts Kit - Black Mil-Spec AR15 Lower Parts Kit Compatible with Multiple Calibers A2 Pistol Grip Magpul Trigger Guard Made in the USA$115.00 -
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...$22.95 -
Out of stockOn Sale
Grid Defense AR-9 80% Lower Receiver Without Fire/Safe Engravings - Raw
Sale: $74.99MSRP: $179.00Grid Defense AR-9 80% Lower Receiver - Raw Raw Aluminum Finish Machined from 6061 billet aluminum Compatible with any Glock style small frame pistol calibers Compatible with Glock pattern or...Sale: $74.99MSRP: $179.00