Commonly Purchased with ZEROED Lower Parts Kit, AR15, Gunbuilder's Kit
Receiver Extension Kit, Carbine, AR15
Starting at
$74.95
Screw, 1/4-28 x 1"Lg., Pistol Grip, AR15
Starting at
$1.49
Washer, Star, 1/4 Screw, Pistol Grip
Starting at
$1.49
Nut, Receiver Extension, M4
Starting at
$8.95
ZEROED Ambi Charging Handle, AR15
Starting at
$79.95
ZEROED Pistol Grip
Starting at
$17.95
ZEROED Trigger Guard Kit
Starting at
$7.95
Magazine, Mk4/AR15, 22LR, 25rd
Starting at
$24.95
ZEROED Anti-Walk Trigger Pins
Starting at
$9.95
Magazine, AR15, 9mm, 33rd, Gen II
Starting at
$29.95
ZEROED Lower Parts Kit, AR15, Gunbuilder's Kit
Customization is endless with the AR15 platform, which is why the CMMG® ZEROED™ Mk4/AR15 Gunbuilder’s Kit includes all of the essential parts except the most commonly upgraded ones: Trigger Guard, Fire Control Group, and Pistol Grip. Check out our interactive install walkthrough video below or read the CMMG Resources LPK Install article for an in-depth breakdown. All parts meet or exceed mil-spec. All installation hardware included.
- Bolt Catch Plunger, Spring, & Roll Pin
- Trigger/Hammer Retaining Pins
- ZEROED 60°/90° Adjustable Ambi Safety, Detent, & Spring
- ZEROED Ambi Magazine Catch & Spring
- ZEROED Magazine Release Button
- HD Pivot/Takedown Pins, Detents, & Springs
- Buffer Retainer & Spring