The app, and if it wasn't obvious (I'm assuming it is but you never know), the app was NOT BY ME...
Initially I wanted to just have rifles, but then I decided I'll simply include every type of gun other than a pistol. May be overkill but on another end, I don't feel like putting too much emphasis on what I've made from the app 'Pimp my gun', another reason why I've waited this long after doing over a hundred guns to upload now.
So next time will be a while, if ever.
Some guns I experimented on more than others, while some were meant to see if I could do it 'right' such as the MK-12 and M-24, as well as arguably the M-14. And not every gun is ideally grouped since besides when I made them, I had to try and fit them all to a specific space, easier said than done.
Again the app [link]