Yes days, M4 parts cannot be found in tents at the moment(except for weapon flashlight), and finding a server that just restarted can take hours to find alone. I prefer the M4, I spent days and nights looking for a damn part for it and finally my friend finds it on a heli crash; at the end of the day the game loot is too damn low, and yes loot respawning is possible in the current version just not implemented.

moeb1us, To first dupe you must have the items you want to dupe, meaning that one or more players have items. Yes it does unbalance the game, but don't forget about the person that had to search hours (even days) for one part to a gun, the fact that loot doesn't respawn and is so scarce duping is to be expected. Duping will continue at high levels until the devs fix many of the issues with loot as it is.

Tested similar bug, still works