Commonly Purchased with Lower Parts Kit, Mk3, Gunbuilder's Kit
Parts kit, Mk3, HD Pivot and Takedown Pins
Starting at
$24.95
Parts Kit, AR15, Lower Pins and Springs
Starting at
$14.95
Buffer Retainer, AR15
Starting at
$1.99
Spring, Buffer Retainer, AR15
Starting at
$1.99
Receiver Extension, M4
Starting at
$39.95
Nut, Receiver Extension, M4
Starting at
$8.95
Receiver End Plate, M4
Starting at
$4.95
Receiver End Plate, Ambi Single Point
Starting at
$7.95
Magpul CTR Stock, Mil-Spec
Starting at
$61.95
ZEROED Anti-Walk Trigger Pins
Starting at
$9.95
Lower Parts Kit, Mk3, Gunbuilder's Kit
The CMMG® Mk3 Gun builders kit includes most of the necessary parts to build up your lower group except the commonly upgraded parts. Does not include Fire Control Group or Pistol Grip. Compatible with CMMG Mk3 Lowers and most LR308 type lowers. Check out our LPK Install resource article for an interactive assembly guide and in-depth breakdown. All CMMG products come with our Lifetime Quality Guarantee.
Kit Includes:
- Bolt catch & screw-in pin
- Bolt catch plunger & spring
- Trigger/hammer retaining pins
- Safety, detent, & spring
- Magazine catch, spring, & release button
- Pivot/takedown pins, detents, & springs
- Buffer retainer/spring
**Not all 308 lowers are the same. Our kit is designed to work with our lowers and are “Mil-Spec”. We would recommend checking with the manufacturer of your lower for compatibility of parts if you are not using our receiver**
Specifications
| Platform | Mk3 |
| Safety Selector | CMMG Mil-Spec |