Case ability and ability aspect amongst the 39mm and the 54R is considerable so shortening the gasoline system won't seem to be a good idea IMHO. This post needs added citations for verification. Be sure to aid enhance this text by incorporating citations to reputable sources. Unsourced substance may be http://emilianomonml.tinyblogging.com/The-2-Minute-Rule-for-Ak-54-24111150