>>1408014300 grain? gotta be not very penetrative with metal surfaces. Russian spec-ops has VSSK Vykhlop, which is anti-material silenced rifle. It has 12.7x55mm with 290 m\s and 617 grain. Holy shit, that is a real howitzer pistol.
>>1408016yeah, but never seen black polymer ones, only designed like on your pic - wooden parts