I have been thinking for a while about this, and i think it is a good thing that the AS50 and m107 have been removed as they were pretty ridiculously overpowered (especially the as50). But i think there should be an option for disabling vehicles for players that have been alive/lucky enough to find such a powerful weapon. So my suggestion is to add a BOLT ACTION 12.7x99mm rifle. As the semi auto ones make it too easy to spray close quarters. But my main balance suggestion is about ammo. I don't know how hard this would be too incorporate but what if you found only single bullets and not magazines? Also they would be rare as hell, probably only found at crash sites. now i don't know if a single bullet can be loaded into such a rifle but if not, you would also have to find empty magazines that would also be very rare, but you could only combine a single bullet with an empty magazine. I think if bullets were so precious and rare, people that found this gun and manage to collect some ammo would really have to think hard on what they are going to shoot, instead of having 10-20 shots they might have one or two, so they are not going to be wasting on nonthreatening survivors, but on something much more important. Also carrying ammo for it would be a pain as each shot takes one slot of your inventory, so i think it would be a pretty balanced but very powerful piece of equipment for anyone lucky enough to find one. Before writing this thread i was going to suggest the L115a3, seen as it is already in the game, but after testing it on the shooting range i found it to be quite weak against the vehicles. So my suggestion is to base the ammo off the as50 12.7x99mm nato rounds.