The game would be more interesting if gun spawns were randomized. All military guns should have the ability to spawn in tier 3 and 4 areas but only one of each gun should be spawnable in those areas. Having to go to gas zones is far too inconvenient if you're a nomad type of player. Finding the entire gas suit and enough filters is the kind of thing you do if you have a stash and not everyone stashes their loot. That being said if you do put the time in to get a suit and filters together you should be rewarded instead of going in and barely finding anything other than suppressors, all kinds of loot should spawn in gas zones including the heli crash loot. Suppressors should rarely spawn on guns outside of gas zones. It should be a very rare occurrence that you find any of the items outside of the gas zones or heli crashes, these changes would add to the adventure as the game is repetitive.