Due to high demand and supply chain issues affecting many industries, some of our parts and accessories may be on backorder and have an extended lead time. Items currently on backorder can still be purchased and orders will be shipped out in the order they were received. We apologize for the inconvenience and appreciate your patience as we traverse this extremely busy time.
RIFLE, BANSHEE, Mk57, 5.7X28MM, 5", NFA
Interchangeability matters, that’s why the Mk57™ is not only chambered in the same caliber, 5.7x28mm, as other popular PDWs and pistols, but the BANSHEE™ Mk57 SBR uses FN®* Five-seveN®* pattern magazines. Not only do shooters get more ways to use their mags, the Mk57 still brings the full set of AR15 features, making rifle operation second nature. With 5” barrel this is the smallest Mk57 SBR CMMG® has to offer.
Available in a range of cerakote finishes, the BANSHEE series represents the most innovative AR pistols and SBRs available today. From the quick deploying RIPSTOCK®, to the stylized receivers and EML™ handguards, every BANSHEE is tailor-made to be the personal defense weapon you can always depend on. New EML4 handguards feature M-LOK® slots at 3, 6, & 9 o’clock positions and a full length picatinny top rail for accessories as well as an integrated handstop.
Originally developed for the .45 ACP MkG platform, CMMG has adapted our Radial Delayed Blowback system across our pistol caliber lineup to create pistols and rifles with a softer recoil impulse and reduced bolt weight compared to traditional straight blowback systems. Check out our CMMG Resources article & video to learn more about what sets Radial Delayed Blowback apart.
**All NFA rules apply** All BANSHEE NFA SBRs (short barrel rifles) require additional ATF paperwork & processing time. See linked CMMG Resource article for more information.
The AR platform is well known for its capability for customization but picking the right parts doesn’t have to be a nightmare of homework. Everything from the RIPSTOCK to the full kit of ZEROED parts and accessories are made here in the USA with quality and attention to detail that is second to none and each BANSHEE comes equipped with a slew of ZEROED parts standard, including:
We aim to please, that’s why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects. Learn More.
~Firearms shipping to states with magazine capacity restrictions will only ship with 10rd magazines in place of standard capacity magazines. CMMG does not address any other state compliancy requirements for further restricted states.
|Operating System||Radial Delayed Blowback|
|Barrel Material||4140CM, SBN|
|Muzzle Device||CMMG ZEROED Linear Compensator|
|Muzzle Thread||1/2 x 28|
|Gas Port Location||N/A|
|Upper Receiver||Billet 6061 T6 Aluminum|
|Lower Receiver||Mk57 Forged 7075 T6 Aluminum|
|Hand Guard||CMMG EML4 M-LOK|
|Charging Handle||CMMG ZEROED Ambi|
|Pistol Grip||CMMG ZEROED Pistol Grip|
|Receiver Extension||CMMG 6 Position Fastback Extension|
|Stock / Brace||CMMG RipStock|
|Trigger Type||Mil-Spec Single Stage|
|Safety Selector||CMMG ZEROED 60/90 Degree|