Accepting Sig Sauer M17/P320 Magazines the CMMG Mk17 delivers a new level of performance to the PCC world. Not only is it on an elite playing field in terms of fit and function the Mk17 brings out all the features you�ve come to expect from CMMG including Last Round Bolt Hold Open. - For personal defense the Mk17 is offered in CMMG�s short-barreled BANSHEE line of AR Pistols and SBR�s. Pair the BANSHEE with your existing M17 or P320 and you�ve got the convenience of magazine interchangeability along with the proven reliability of two established powerhouses. For competition and recreational shooters the Mk17 comes in CMMG�s RESOLUTE line of 16-inch barreled rifles. The Radial Delayed Blowback operating system guarantees less felt recoil which means faster follow up shots and a more enjoyable shooting experience. - TECH SPECS: - CALIBER: 9�19 - BARREL: 8� 1:10 twist Medium Taper 4140CM SBN - MUZZLE: A2 Comp threaded 1/2-28 - GAS PORT LOCATION: N/A - RECEIVER: Forged 7075-T6 AL M4 type upper Forged 7075-T6 AL Lower - HAND GUARD: CMMG RML7 M-Lok hand guard - FINISH: Hard Coat Anodized Receivers and Hand Guard (Can be upgraded to Cerakote) - CHARGING HANDLE: CMMG Mil-Spec - PISTOL GRIP: Magpul MOE - PISTOL BRACE: CMMG Standard RipBrace with 6 Position Fastback Receiver Extension and Ambi Sling Plate - TRIGGER: CMMG Single stage mil-spec style trigger - TRIGGER GUARD: Integrated Into Lower - SAFETY SELECTOR: CMMG Mil-Spec - MAGAZINE: P320 21rd - WEIGHT: 5lbs 12oz(unloaded) - LENGTH: 24.4� (brace collapsed)