More updates. Took the bipod off the barrel. Oversized charging handle, muzzle break, dual hook trigger job and new retaining plate, etc. I had to buy a 14x1 die to thread the muzzle. The Chinese didn't put threads on their muzzles as with other AK variants. There were tool marks, very fine grooves. Once I threaded the muzzle the muzzle break screwed right in, LH threads.