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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On Sale
Grid Defense Mil-Spec Lower Parts Kit - FDE
Sale: $59.99MSRP: $79.99Ghost Firearms Mil-Spec Lower Parts Kit - FDE FDE Cerakote Trigger Group FDE Cerakote A2 Grip Buffer Retainer Pin Buffer Retainer Spring Trigger Guard Safety Selector Bolt Catch Spring Detent Spring Bolt...Sale: $59.99MSRP: $79.99 -
Out of stock
HEXMAG AR15 ADVANCED TACTICAL GRIP - BLACK
$29.99HEXMAG AR15 ADVANCED TACTICAL GRIP - BLACK Fits AR-15 and AR-10 platforms 17 for pistols/SBRs" 25 degree for standard angle or 33 degree for long range Made from fiber-reinforced polymer HexMag's AR-15 Advanced Tactical Pistol Grip features a...$29.99 -
Magpul STR Carbine Stock - Black
$84.95Magpul STR Carbine Stock Compatible with Milspec Carbine Buffer Tube AR15/M4 Butt Stock Reinforced Polymer Construction Improved Cheek Weld Two Water Resistant Battery Tubes QD Sling Mount 0.30" Thick Butt Pad Made in the USA$84.95 -
Mil-Spec Pistol Buffer Tube Assembly
$30.00 - $35.00Mil-Spec Pistol Buffer Tube Assembly Made in the USA 1.25" Outer Diameter Machined from 7075-T6 Aluminum End Plate Castle Nut Carbine Buffer Spring Carbine Buffer Available in Black Anodize and Cerakote Finishes$30.00 - $35.00 -
PHASE5 OVERSIZED MAGAZINE RELEASE RED
$21.99PHASE 5 MAG RELEASE - OVERSIZED MAGAZINE RELEASE 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...$21.99 -
Out of stock
RADIAN WEAPONS AR15 AMBIDEXTROUS TALON SAFETY SELECTOR 2-LEVER KIT - TUNGSTEN GRAY
$49.95AMBI TALON SAFETY SELECTOR 2-LEVER KIT - TUNGSTEN GRAY 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...$49.95 -
Out of stock
RADIAN WEAPONS RAPTOR AMBI TALON SAFETY SELECTOR 2-LEVER KIT - NP3
$74.95AMBI TALON SAFETY SELECTOR 2-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 rotating the shaft 180° inside the lower receiver...$74.95 -
Radian Weapons Talon Ambidextrous Safety Selector - Flat Dark Earth
$64.95Radian Weapons Talon Ambidextrous Safety Selector - Flat Dark Earth Short & Long Lever Billet Aircraft Grade Aluminum Center Shaft Machined from Hardened Steel AR15/AR10 Compatible$64.95 -
Out of stock
TACTICAL DYNAMICS SKELETON GRIP - PERIWINKLE
$79.00Tactical Dynamics Skeleton Grip - Periwinkle Machined from 7075-T6 Aluminum Durable and Lightweight Compatible with AR15/AR10 Platforms Unique Design Made in the USA Periwinkle Cerakote Finish$79.00 -
TIMBER CREEK ENFORCER AR PISTOL GRIP - FLAT DARK EARTH
$99.99ENFORCER AR PISTOL GRIP - FLAT DARK EARTH Cerakote FDE Pistol Grip Weighs 4oz. Manufactured by Timber Creek Outdoors, Inc.$99.99 -
Out of stock
$99.99 -
Wilson Combat Single Stage Trigger
$189.95Wilson Combat Single Stage Trigger 5-5.75 Lb pull Fits AR-15 style rifles$189.95 -
Out of stock
2A Armaments Builder Series Slotted Trigger Guard
$14.992A Armaments Builder Series Slotted Trigger Guard Precise Manufacturing Long Term Reliability Durable Construction Black Anodized Finish For AR-15 Rifles Aluminum Construction$14.99 -
Out of stock
Adaptive Tactical EX Lite Stock - Black
$34.99Adaptive Tactical EX Lite Stock - Black Only compatible with Mil-Spec sized extension tubes Covered take down pin makes installation and removal easier and eliminates discomfort M4-style stock with adjustable length-of-pull Easy to reach...$34.99 -
Out of stock
AR Enhanced Ambidextrous Safety Selector - Black
$20.99AR Enhanced Ambidextrous Safety Selector - Black For Left or Right-Handed Shooters Replaces Existing Safety Lever Easy-To-Operate Safety Lever on Both Sides of The Receiver Does Not Interfere with Grip Position or Thumb Placement Fits Semi-Auto ...$20.99 -
Out of stock
AR Enhanced Ambidextrous Safety Selector - Gold
$23.99AR Enhanced Ambidextrous Safety Selector - Gold For Left or Right-Handed Shooters Replaces Existing Safety Lever Easy-To-Operate Safety Lever on Both Sides of The Receiver Does Not Interfere with Grip Position or Thumb Placement Fits Semi-Auto ...$23.99 -
Out of stock
AR Enhanced Ambidextrous Safety Selector - Red
$23.99AR Enhanced Ambidextrous Safety Selector - Red For Left or Right-Handed Shooters Replaces Existing Safety Lever Easy-To-Operate Safety Lever on Both Sides of The Receiver Does Not Interfere with Grip Position or Thumb Placement Fits Semi-Auto ...$23.99 -
Out of stockOn Sale
AR-15 80% Lower With Fire/Safe Engravings | SBA4 | Mil-Spec LPK | Carbine Buffer Tube Kit
Sale: $189.99MSRP: $379.94AR-15 80% Lower With Fire/Safe Engravings | SBA3 Pistol Brace | Mil-Spec LPK | Carbine Buffer Tube Kit This AR-15 80% Lower Build Kit provides a solid foundation for your next custom rifle. Featuring an 80% lower receiver with Fire/Safe engravings, an...Sale: $189.99MSRP: $379.94 -
Battle Arms Development AR-15 Nickel Teflon Enhanced Trigger Assembly
$69.00Battle Arms Development AR-15 Nickel Teflon Enhanced Trigger 5.5-6 lbs Trigger Pull Weight Nickel Teflon Made in the USA Hammer Disconnect Trigger Spring, Hammer Spring and Disconnect Spring Included$69.00 -
Battle Arms Development BAD-ASS PRO Ambi Safety Selector
$45.00Battle Arms Development BAD-ASS PRO Ambi Safety Selector Specifications: SKU: BAD-ASS-PRO-1522 UPC: 810033780257 Manufacturer: Battle Arms Development, Inc. Center Material/Finish: Swiss CNC Machined Bar-Stock Steel Core, Hardened, Black...$45.00