Duping is back!
But this is also why:
Posted every single day. Answered every single day. If you are on console and duping has returned , then that is the #1 reason. If not duping, then this situation is inevitable on console and pc.
Short answer. Some items are rare, on purpose, and spawn in limited quantities.
Long answer:
All items that spawn have:
LIFETIME on the ground
RESTOCK timer until placed into the spawn queue.
MIN/MAX(NOMINAL) before any respawn is done. Once its at max, no more will spawn . When it hits min, more are put into a queue to spawn in an appropriate place.
QUANTMIN/MAX are for items with capacity like water bottles, canteens, mags, etc
Flags to decide what to count (can be IN_CARGO, IN_HOARDER, IN_MAP, IN_PLAYER) Also flags for crafted and DYNAMIC EVENTS (deloot/heli crash)
Spawn Location - class of buildings/location (Military, Police, Farm, Village, Town, Hunting, School, Industrial, Medic, Firefighter, Prison, Coast)(floor, shelves), and tiers (1,2,3,4)
Tier 1 is the SE coast and tier 4 is the NW woods. I don't know the exact dividing lines, but you get the idea.
Gun/MAX/HeliCrash? [Spawn Locations]
BK-18(IZH18)/100 [Farm, Town, Village, Hunting - Tier 1,2]
BK-133 (MP133) /100 [Police, Farm, Village, Hunting - Tier 1,2,3]
CR-61 Skorpion(CZ61)/30 [Police]
CR-527(CZ527)/50 [Farm, Village, Hunting - Tier 2,3,4]
KA101(AK101)/5 [Military - Tier 4]
KA74(AK74)/10 [Military - Tier 2,3,4]
KAM(AKM)/10 [Military - Tier 3,4]
LAR (FAL)/4/Y [Military - Tier4]
M4/10 [Military - Tier 3,4]
M70 Tundra(Winchester70)/15, [Hunting - Tier 2,3,4]]
Mosin/70 [Town, Village, Hunting - Tier 2,3]
SG5-K (MP5K)/20 [Military - Tier 1,2]
SKS/30 [Military - Tier 2,3]
USG-45 (UMP45)/20 [Military - Tier 2,3]
VSD (SVD)/4/Y [Military - Tier 4]
VSS/3/Y [Military]
[I believe the HeliCrash weapons only spawn there, but the loot table entries have other notations I left in for completeness]
The loot state is not affected by a server restart.
In general, the low end weapons are counted on the ground(which is basically what's spawned at that moment). Some weapons (KA74, KAM, M4A1) are counted in storage/cargo/map, but not players and some (KA101,LAR,VSD/VSS) are counted on players too . It makes them all relatively rare, on purpose.
The best gun is the one you have.