Lower Group, RESOLUTE, Mk57, ZEROED Trigger
When it comes to picking a lower for your 5.7x28mm carbine or SBR, this RESOLUTE® Mk57™ lower group capitalizes on cross-compatibility, giving you the ability to use the same magazines on your Mk57 rifle and other firearms that utilize FN®* Five-seveN®* pattern magazines. Available in seven different Cerakote finishes, RESOLUTE Mk57 lowers come with a suite of meticulously engineered CMMG parts and accessories like:
We aim to please, that’s why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects. Learn More.
**Mk57 Lowers are designed for use with CMMG 5.7x28mm Radial Delayed Blowback uppers only**
Specifications
| Platform | Mk57 |
| Caliber | 5.7x28mm |
| Lower Receiver | Mk57 Forged 7075 T6 Aluminum |
| Finish | Cerakote |
| Pistol Grip | CMMG ZEROED Pistol Grip |
| Buffer Type | Carbine |
| Receiver Extension | CMMG 6 Position Fastback w/Ambi Sling Plate |
| Stock / Brace | CMMG RipStock |
| Trigger Type | ZEROED Drop-In Single Stage |
| Trigger Guard | Integrated |
| Safety Selector | CMMG ZEROED 60/90 Degree |
| Weight | 2.4 lbs |
| Length | 14.9" |