Looks like the barrel is too long to begin with but no pics to proove this theory. The heat shield is indeed butchered as eluded to and a second one put in front. Two for the price of one. The whole thing is suspect in my eyes...Specially if the barrel comes to the front of the bayonet mount. The stampings don't mean anything on this one. The so called CYL marking isn't pictured, could be hand stamped...on and on...