Great app but with some problems – Gun Club Armory Review

I love this app except for the fact that I had bought all the ammo types and now I can't even use them on some of the Special ops pack, on top of that I don't understand why the other barrel extension on the m4 are not apart of the pack it came in but if I want them I have to buy use my own money to buy everything individually kinda disappointing.
Review by Hazmat soldier on Gun Club Armory.