Quote: "Okay, I will make it bigger. And yeah, that's where it loads, where should I put it instead?"
It's really up to you where you put it as long as it's logical.
If you keep it in the pistol grip, then the shotshells would have to be
really short compared to a normal sized shotshells which are generally 2.5 to 2.75 inches long (you'll see sizes for a 12 gauge listed as 2.75" or 3" for normal and 3.5" for magnums but that is the size the shotshell opens up to after being fired). However, google "Aguila Minishell" and you'll find there are some specialized, light-load shotshells which are only 1" long and could conceivably fit inside a large pistol-grip magazine. If you used light loads like these, then it would explain the small size of your suppressor but it would be a very close range weapon and probably not too powerful.
Now, if you go that direction, you have to look at some general design problems with your weapon. If the shotshells load from the grip area, then how do they get into the firing chamber? You don't need to actually show the operating bits but you do need to allow room for where they would go. With your gun, that would mean lengthening the back side of your gun so that it comes a bit past the pistol grip. It would give a lop-sided T shape in lieu of the L shape you now have. That would allow whatever recoiling mechanism room to travel rearward past the magazine after firing and scoop up a new shotshell for the next shot.
OK, I type too much lol
