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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ATI Outdoors AR-15 Buffer Spring
$6.99ATI Outdoors AR-15 Buffer Spring Manufactured in the USA Virtually Indestructible Fits Most AR-15 and AR Variants$6.99 -
Out of stockOn Sale
Grid Defense AR-15 80% Lower Receiver With Fire/Safe Engravings 5 Pack - Black
Sale: $240.00MSRP: $700.00Grid Defense AR-15 80% Lower Receiver With Fire/Safe Engravings 5 Pack - Black Includes 5 80% Lower Receivers Machined from 7075-T6 Aluminum Forging 8625 Type III Hardcoat Anodize – Black Flared and broached magazine well Rear upper lug...Sale: $240.00MSRP: $700.00 -
Grid Defense Pistol Lower Parts Kit with Fin - FDE
$129.98Grid Defense Pistol Lower Parts Kit with Fin - FDE Grid Defense Pistol Stabilizing Fin - FDE -Finished in Magpul Flat Dark Earth Cerakote -Constructed from Reinforced Polymer -Increases Weapon Control and Stability -Weighs 5.7oz -Fits Pistol...$129.98 -
On Sale
SB Tactical SBA4 Adjustable Pistol Brace With Grid Defense Buffer Tube Kit - Sniper Gray
Sale: $119.95MSRP: $169.95SBA4 with Grid Defense Buffer Kit - Sniper Gray SB Tactical SBA4 Pistol Stabilizing Brace Complete Grid Defense Buffer Tube Assembly Kit Carbine buffer (3 oz) Carbine buffer spring Carbine stock end plate Carbine stock lock ring-castle nutSale: $119.95MSRP: $169.95 -
TIMBER CREEK AMBIDEXTROUS SAFETY SELECTOR - FLAT DARK EARTH
$39.99AMBIDEXTROUS SAFETY SELECTOR - FDE Flat dark earth Made in the USA Variety of Colors Manufactured by Timber Creek Outdoors$39.99 -
Out of stock
Ghost Grip - Smith& Wesson Red
$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 into the left hand side of...$19.99 -
KNS NON-ROTATING TRIGGER/HAMMER PIN .154 - G2 MOD2
$33.00KNS NON-ROTATING TRIGGER PINS/ANTI ROTATION HAMMER PIN .154 - G2 MOD2 Item Info Item 32381-2 UPC 851876003097 Brand KNS Precision, Inc Model .154 Diameter Mfg No NRTHPMOD2-154-Black Tech Specs Type Part Finish Color...$33.00 -
Magpul MOE Plus AR Grip - OD Green
$24.95Magpul MOE Plus AR Grip - OD Green AR15/M4 Pistol Grip Beavertail Backstrap Anti Slip Texture Olive Drab Green Reinforced Polymer Construction 25 Degree Angle Grip Weighs 3.4oz Made in the USA$24.95 -
Rise Armament Super Sporting Trigger - Live Free or Die
$129.99Rise Armament Super Sporting Trigger - Live Free or Die Clean break with a short reset Enhanced accuracy by minimizing gun disturbance Allows faster initial and follow up shots when compared to a standard trigger Flat trigger blade for enhanced...$129.99 -
On Sale
Strike Industries Enhanced Lower Parts Kit
Sale: $74.65MSRP: $82.95Strike Industries Enhanced Lower Parts Kit Enhanced Bolt Catch Strike Magazine Catch Strike Magazine Catch Button Enhanced Pivot Pin Enhanced Takedown Pin SI Selector Lever SI Selector End Plate SI 60-90 degree 3-in-1 Selector ShaftSale: $74.65MSRP: $82.95 -
Out of stock
TIMBER CREEK AR OVERSIZED TRIGGER GUARD - BLACK
$23.99AR OVERSIZED TRIGGER GUARD - BLACK Drop in Trigger Guard Variety of Colors Aircraft grade billet aluminum Manufactured by Timber Creek Outdoors Inc. Black Anodized Finish$23.99 -
Out of stockOn Sale
Grid Defense AR-10 80% Billet Lower Receiver Without Fire/Safe - Tungsten Gray
Sale: $100.00MSRP: $250.00Grid Defense AR-10 80% Lower Receiver Without Fire/Safe - Tungsten Gray Machined from 6061-T6 Billet Aluminum Made in house in the USA Flared and Broached Magwell Finished in Tungsten Gray Cerakote Does not have Fire/Safe Makings Compatible with...Sale: $100.00MSRP: $250.00 -
Grid Defense No FCG Mil-Spec Lower Parts Kit
$29.99Grid Defense No FCG Mil-Spec Lower Parts Kit A2 Grip Buffer Retainer Pin Buffer Retainer Spring Trigger Guard Safety Selector Bolt Catch Spring Detent Spring Bolt Catch Plunger Bolt Catch Magazine...$29.99 -
STRIKE INDUSTRIES AMBI MAGAZINE RELEASE - BLACK
$41.95Strike Industries AMBI Magazine Release Made in USA Low Profile and Ergonomically Designed Includes Enhanced Magazine Release Button and Spring for Complete Drop-in Upgrade Ambidextrous for The Left and Right Handed Shooters Manufactured by Strike...$41.95 -
Strike Industries Extended Bolt Catch - Black
$16.95Strike Industries Extended Bolt Catch - Black Wide surface area "ping pong paddle" for faster operation Solid Investment Cast8620 construction Widened Bolt Catch Lower Lever Compatible with AR-15 Style Lower$16.95 -
Out of stock
Strike Industries Extended Pivot/Takedown Pins - Gold Coating
$15.95Strike Industries Extended Pivot/Takedown Pins - Gold Coating Strike industries extended takedown pins and pivot pins are ideal for shooters looking for a custom look and that run multiple upper receivers off of a single lower. Made out of...$15.95 -
On Sale
STRIKE INDUSTRIES MAGAZINE CATCH - BLUE
Sale: $14.95MSRP: $16.95STRIKE INDUSTRIES MAGAZINE CATCH - BLUE Enhanced Magazine Catch: Steel 6061-T6 Aluminum Release Button Solid Billet Aluminum Construction Unique Anodized Colors Blue FinishSale: $14.95MSRP: $16.95 -
TIMBER CREEK AR EXTENDED MAGAZINE RELEASE - TUNGSTEN
$19.99AR EXTENDED MAGAZINE RELEASE - TUNGSTEN Aircraft grade billet aluminum Tungsten Gray Cerakote Finish Made in the USA Manufactured by Timber Creek Outdoors Inc.$19.99 -
Out of stock
TIMBER CREEK AR OVERSIZED TRIGGER GUARD - BLUE
$23.99AR OVERSIZED TRIGGER GUARD - BLUE Drop in Replacement Trigger Guard More space for a large or gloved firing hand Blue Anodize Manufactured by Timber Creek Outdoors, Inc.$23.99 -
Out of stock
TIMBER CREEK AR TAKEDOWN PIN SET - BLUE
$19.99AR TAKEDOWN PIN SET - BLUE Machined from billet aluminum Anodized finish Made in the USA Compatible with Milspec AR15/M4 Lower Receivers These CNC machined pins are drop in replacements for Mil-Spec lowers and allow easier disassembly of...$19.99