Pistol, Banshee™ 300, Mk4, 5.7 x 28mmCMMG have launched their new 5.7 AR conversion kit, individual parts and pistols. The CMMG MK4 5.7 Upper and a 40 round conversion mag will allow any AR-15 to be converted to chamber 5.7x28mm in seconds. The new conversion kits and pistols follow on from the Banshee Mk57 5.7×28 pistol released in 2018, which used the […]

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