Because Apex Bomber is meant to hold his gun. Sometimes I do that but I usually only do it for Apex Prime.

why dont you put his gun on his left shoulder

Yes, that's what I said. Commemorative Series II reissue. Very, very nice set and a G1 classic (although obviously of Takara design but this is the Hasbro version although oddly enough, the sticker sheets have some Japanese writing on them). I highly recommend the set with Apex Bomber and Powermaster Prime. It's titled as Autobot Powermster Optimus Prime (TM) with APEX ARMOR (the Apex Armor bit is in small writing so when I first got mine, I thought it was just Prime). Well worth the cash.

this is the ressiue right