Not to me it doesn't, and if it is not a 550
Funny trigger blade, wrong shape safety and appears to have screw on bases.
Nah - that's the BRNO set trigger.
Looks like a ZKK/601 to me there's no mistaking that trigger.
"let him without sin cast the first stone"
Zkk-601 awful trigger never got on with it easy to take apart stick another blade in it but needed some gun smithing to get somewhere near I don't think I put 50 bullets through it before I sold it.