Just gained my MCK for a G19 created from a poly80 kit which has a tailor made Rock fluted slide and threaded barrel. When ordering I had been worried whether the more fifty percent inch of your threaded barrel would fit when the barrel shroud was prolonged to G17 size. https://recovertactical202039517.thenerdsblog.com/31478346/recover-tactical-20-20-can-be-fun-for-anyone