zp crates ALWAYS give lots of coupons. i get them in 2's in almost every spin. plus when it gives you gp it usually adds up. if you want to win a permanent gun. my advice is to buy anaconda adv. ive won it 3 time. twice in 20 and once in 5. deagle camo too hard to win...for me anyways lol
I know a GP Crate. XM8 Adv. It's a quite decent gun if you think about it. Also, you can go for the D.E.C it's so good. AUG if you can control the spread. Other than that the easiest one to obtain is Tommy/Winchester.