<font color=red>*</font><font color=red>*</font><font color=red>*</font><font color=red>*</font><font color=red>*</font>. 4" can on M21 beretta DOES fit IWB. Also, when the .22 unit is on your glock, u aint GOT a powerful sidearm. When I have BOTH m21 .22 AND pocket 9, I DO have both,andthe PAIR weigh less than your Glock and .22 unit. 
I DO know how to make a 4" long can that is adequately quiet. YOU are stuck with what'scommercially available. You wouldn't even know how to get one screwed onto that Glock .22 unit.
I DO know how to make a 4" long can that is adequately quiet. YOU are stuck with what'scommercially available. You wouldn't even know how to get one screwed onto that Glock .22 unit.
