Fire Mods
Recoil springs: less recoil. (Recoil Springs)
18compatible weapons
Unlocked at Weapon Level 8.how to unlock
Compatible weapons 18
AK-27
AKITA
AN-94
FG42
Gremlin
KOGOT-7
M10 BREACHER
M15 MOD 0
M8A1
MADDOX RFB
Mammoth
MK35 ISR
PEACEKEEPER MK1
Sokol 545
TR51 Para
VOYAK KT-3
WARDEN 308
X9 MAVERICK
Source
Official source when available