Just checking to see if my game bugged out. I found 10 memory cards and got the tutorial pop-up telling me that the Shredder SMG is unlocked. When I go to one of the self serve gun stores though I don't see it in the inventory. Am I suppose to do something else to get the gun (like unlock more radio towers), or did my game glitch out?

It's suppose to be in signature weapons, which is a little lower on the list. You also need to buy it after unlocking it.

It's perhaps the best gun in the game, only really matched by the bushman (unique assault rifle.)

Same thing happened to me, as above posters have mentioned there's a special section of the store for Signature Weapons. Just know that you still have to buy it to actually equip it. What you've done is just unlock it for purchase.

i love this game