This is a KRISS USA, Inc known as the VECTOR CRB chambered in 22 LR, model KV22-CBL00.
The Vector CRB is the ideal choice for recreational use and competition in pistol caliber carbine divisions. Like all KRISS Vector firearms" the CRB is fed with full size Glock(R) magazines" allowing for a wide range of large capacity options. At the heart of the Vector CRB is the Super V System" a nonlinear" multilink" blowback system designed to redirect recoil energy down. The Super V System in conjunction with the low bore axis reduce felt recoil and muzzle climb.
Features:
Closed Bolt, Delayed Blowback
Pivoting, Single Stage Trigger
Super V Recoil Mitigation System
