Lower Receiver Assembly, Mk17, 9mm, P320 | CMMG - AR 15 and AR 10 Builds and Parts
Accepting Sig Sauer M17/P320 magazines, the CMMG Mk17 delivers a new level of performance to the PCC world. Not on
cmmginc.com
looks like I have To start a new build Soon.
they also have 5.7x28 set up I may have to get.