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
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 -
ATI Outdoors AR-15 X1 Pistol Grip - Black
$29.99ATI Outdoors AR-15 X1 Pistol Grip - Black Fits AR-15/AR-10 Fits the Ruger 22 Charger Pistol with AR-15 Style Grip DuPont(R) Extreme Temperature Glass Reinforced Polymer Scratch & weatherproof$29.99 -
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 -
Elftmann Tactical Adjustable Trigger with Curved Shoe - Black
$139.00Elftmann Tactical Adjustable Trigger with Curved Shoe - Black Fits any and all AR platforms Incremental Adjustment Knob Drop-Safe Adjustable from 2 3/4lbs to 4lbs without removing from lower Patented Double-Double torsion hammer spring Short pull...$139.00 -
Out of stock
ERGO 2 Sure Grip - FDE
$25.99ERGO 2 Sure Grip - FDE Design allows installation on both .223 and .308 AR-15/AR-10 type receivers. A2 sized inner cavity compatible with many accessories available on the market. Ergonomically correct finger grooves Integrated rear upper extension...$25.99 -
Out of stock
F.A.B. Defense GL-Core S AR-15 Buttstock - Black
$55.99F.A.B. Defense GL-Core S AR-15 Buttstock - Black Collapsible Rubber Buttpad Small and Compact Design Fits Mil-Spec and Commercial Buffer Tubes$55.99 -
F.A.B. Defense Gradus AR Pistol Grip - FDE
$29.00F.A.B. Defense Gradus AR Pistol Grip - FDE Ergonomic AR Grip$29.00 -
Out of stock
F1 Firearms GRP Style 1 Grip - Black
$79.99F1 Firearms GRP Style 1 Grip - Black Skeletonized and Textured Construction Type-1 No Finger Grooves Anodized Finish Fits AR Platform Rifles$79.99 -
Out of stock
FAILZERO DROP IN TRIGGER GROUP - CURVED
$179.99FAILZERO TRIGGER GROUP KEY FEATURES: Single-stage trigger system 3.5-lb. pull weight Clean break with a short reset Comfortable, rounded trigger Unit weight: 2.6 oz. CNC machined from high-grade, heat-treated tool steel and...$179.99 -
Out of stock
FAILZERO DROP IN TRIGGER GROUP - FLAT
$184.99FAILZERO TRIGGER GROUP - FLAT KEY FEATURES: Single-stage trigger system 3.5-lb. pull weight Clean break with a short reset Comfortable, flat trigger Unit weight: 2.6 oz. CNC machined from high-grade, heat-treated tool steel and...$184.99 -
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 combined Material 17-4 Stainless Steel Made in the USA$22.95 -
Ghost Firearms Mil-Spec Lower Parts Kit - 5 Pack
$299.95Ghost Firearms Mil-Spec Lower Parts Kit - 5 Pack Trigger Group A2 Grip Buffer Retainer Pin Buffer Retainer Spring Trigger Guard Safety Selector Bolt Catch Spring Detent Spring Bolt Catch Plunger Bolt...$299.95 -
Out of stockOn Sale
Grid Defense AR-15 80% Lower Receiver With Fire/Safe Engravings 10 Pack - Raw
Sale: $434.99MSRP: $1,200.00Grid Defense AR-15 80% Lower Receiver 10 Pack - Raw Includes 10 Raw 80% Lower Receivers With Fire/Safe Markigs Machined from 7075 Forged Aluminum Made in house in the USA Flared and Broached Magwell Raw Aluminum Finish Does not have...Sale: $434.99MSRP: $1,200.00 -
Magpul MOE K-2 AR Pistol Grip - Gray
$20.95Magpul MOE K-2 AR Pistol Grip - Gray Replacement for AR15/M4 pistol-grip One-piece reinforced polymer construction More vertical grip angle than A2 grips Aggressive TSP texture Weight: 2.9oz Thickness: 1.2" Height: 4.1" Grip Angle: 17...$20.95 -
Mission First Tactical Engage AR Pistol Grip - Black
$24.99Mission First Tactical AR Pistol Grip - Black Black finish Tab covers the receiver gaps Secure water resistant storage compartment Plug retention$24.99 -
Odin Works ZULU Stock Kit - Blue
$149.00Odin Works ZULU Stock Kit - Blue Made from 6061 aluminum and Limbsaver recoil pad Secondary Buffer System Reduces Recoil Weight: 1.23 lbs Kit includes: -ZULU Adjustable Stock -Padded Intermediate Buffer Tube -Ambi Sling/QD Plate Length of pull:...$149.00