I have a 19" Canadian 223 factory threaded factory 416 barrel with a chinese gas tube, Rsb, HG retainer, bolt carrier and rewelded chinese GB. Still needs aperture drilled. I have a polish 1960 machined fsb that is nearly identical to the open sight poly legend fsb I can add. I always thought long barrel AKs especially in x39 were stupid. 19 seems like a cool length for a 556 build that won't be heavily modernized. Would be cool to find a bubbad bwk92 to Bubba some more. Ak fantasies, and for no good reason it just never gets old.