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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ALG DEFENSE DROP IN TRIGGER
$65.00ALG DEFENSE DROP IN TRIGGER Single Stage Stock Trigger Reliability Smoother Pull than Stock Triggers 6.5 Pound Pull$65.00 -
Battle Arms Development Enhanced Bolt Catch
$15.00Battle Arms Development Enhanced Bolt Catch 8620 heat treated steel Investment cast Manganese phosphate finish Versatile modular design Oversize control surfaces Raised T-shaped heel Compatible with Norgon ambi-catch Elegant tapered control...$15.00 -
Battle Arms Development Enhanced Pivot & Takedown Pin Set - Titanium
$38.95Battle Arms Development Enhanced Pivot & Takedown Pin Set - Titanium AR15 / M16 / M4 Compatible - Fits all AR15/M16/M4 lower receivers with mil-spec .250in diameter front pivot and rear takedown pin holes. Patent Pending Pivot Pin &...$38.95 -
Out of stockOn Sale
Grid Defense AR-9 80% Lower Receiver Without Fire/Safe Engravings - FDE
Sale: $89.00MSRP: $179.00Grid Defense AR-9 80% Lower Receiver - FDE Finished in Magpul FDE Cerakote Machined from 6061 billet aluminum Compatible with any Glock style small frame pistol calibers Compatible with Glock pattern or style magazines Magazine release button and...Sale: $89.00MSRP: $179.00 -
Grid Defense Complete Lower Pistol Build Kit - FDE
$109.99Ghost Firearms Complete Lower Pistol Build Kit - FDE FDE Cerakote Trigger Group FDE Cerakote A2 Grip Buffer Retainer Pin Buffer Retainer Spring Trigger Guard Safety Selector Bolt Catch Spring Detent...$109.99 -
Out of stock
Magpul MOE AR15 Grip - Gray
$20.95Magpul MOE AR15 Grip - Gray One-piece reinforced polymer construction Beavertail backstrap for enhanced ergonomics Positive anti-slip texture Accepts optional Storage Cores$20.95 -
Phase5 Oversized Magazine Release - Black
$21.99Phase5 Oversized Magazine Release - Black Made in the USA Compatible with AR15/AR10 Receivers Compatible with Anti-Rotation Trigger/Hammer Pin Sets Compatible with Extended Bolt Releases Machined from Billet Aluminum Larger Contact Surface than a...$21.99 -
Out of stock
STRIKE INDUSTRIES AMBI MAGAZINE RELEASE - RED
$43.95Strike 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...$43.95 -
STRIKE INDUSTRIES MAGAZINE CATCH - BLACK
$18.95STRIKE INDUSTRIES MAGAZINE CATCH - BLACK Enhanced Magazine Catch: Steel 6061-T6 Aluminum Release Button Solid Billet Aluminum Construction Unique Anodized Colors Black Finish$18.95 -
STRIKE INDUSTRIES MAGAZINE CATCH - FDE
$18.95STRIKE INDUSTRIES MAGAZINE CATCH - FDE Enhanced Magazine Catch: Steel 6061-T6 Aluminum Release Button Solid Billet Aluminum Construction Unique Anodized Colors FDE Finish$18.95 -
Out of stock
TIMBER CREEK QD END PLATE - FLAT DARK EARTH
$19.99QD END PLATE - FLAT DARK EARTH Cerakote finish Aircraft grade billet aluminum Made in the USA Accomodates right and left hand shooters Quick Disconnect End Plate replaces the standard AR end plate and adds a mounting point for QD sling swivels.$19.99 -
Out of stock
Armaspec Superlight AR-15 Lower Parts Kit - Red
$84.99Armaspec Superlight AR-15 Lower Parts Kit - Red Includes Armaspec Enhanced Lower Parts Compatible with most AR-15 lowers Made in the U.S.A. Lifetime warranty AR-15 lower receiver 1x Armaspec SFT 45/90 Safety Selector 1x Bolt Catch 1x...$84.99 -
Battle Arms Development EMMR Large Enhanced Modular Magazine Release
$35.95BAD-EMMR Large Enhanced Modular Magazine Release BAD-EMMR-L (Enhanced Modular Magazine Release - Large Finger Pad) for the AR15/AR10. Precision CNC Machined for billet 7075-T6 Aluminum, the BAD-EMMR features, unique, patent-pending three...$35.95 -
Out of stock
Ergo SureGrip AR Grip Kit A/T - Desert Tan
$25.99Ergo Suregrip AR Grip Kit A/T DE Desert Tan Color AR15/AR10 Pistol Grip Rear Upper Extension Supports the Web of Your Hand Finger Grooves Aggressive Texture for Improved Control Includes the Patented Grapper for Increased Comfort Over-Molded...$25.99 -
FORTIS SLS FIFTY SAFETY SELECTOR - GOLD
$69.95FORTIS SLS FIFTY SAFETY SELECTOR - GOLD Precise Manufacturing Long Term Reliability Durable Construction High quality components and precise manufacturing make Fortis parts ideal for maintaining and upgrading firearms. The durability, reliability...$69.95 -
Out of stockOn Sale
Ghost Grip - Titanium
Sale: $8.99MSRP: $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...Sale: $8.99MSRP: $19.99 -
Out of stockOn Sale
Ghost Grip - Zombie Green
Sale: $8.99MSRP: $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...Sale: $8.99MSRP: $19.99 -
Grid Defense Pistol Stabilizing Fin - Blue Titanium
$49.99Grid Defense Pistol Stabilizing Fin - Blue Titanium -Constructed from Reinforced Polymer -Increases Weapon Control and Stability -Weighs 5.7oz -Fits Pistol Buffer Tube up to 1.25" (Not Included) -Finished in Blue Titanium Cerakote$49.99 -
Out of stock
MAGPUL MOE CARBINE STOCK - GRAY
$44.95Magpul MOE Carbine Stock - Gray Made in the USA Mounts on Mil-Spec Carbine Receiver Weight: 8.0oz Compatible with Magpul ASAP, ASAP QD and other Receiver Mount Sling Attachments Sloping Cheek Weld Shielded Release Latch to Prevent Snagging Side...$44.95 -
Patriot Ordnance Factory Ambidextrous Safety Selector 50/90 Degree
$62.38Patriot Ordnance Factory Ambidextrous Safety Selector Safety Selector Ambidextrous For Left And Right Handed Shooters 50/90 Degree Manufactured By Patriot Ordinance Factory Made In The USA$62.38