The Krinkov has reasonably high base damage for an SMG (close behind the Swedish K and the SpecOps) and has decent accuracy. This makes it a suitable choice if using a long range primary, such as the UAR or M308.
However, it has a major flaw in its low amount of total ammo; it only has three full magazines' worth of ammo before running out. It also has some of the worst recoil of all the submachine guns, only beaten out by the Mark 10.
To get the most out of the low reserve ammo, it is recommended that one increase the already high damage of the Krinkov and to always go for head shots, unless in an emergency. For longer ranges, one should try to burst fire to keep the recoil in check and save ammo.
It is a viable secondary weapon for Plan A, due to its high concealment.
The Krinkov is based on the AKMSU, as indicated by its internal name in the weapon asset files and the AKMS's ribbed cover. However, the AKMSU is a term given to an AKM rifle that was modified after purchase, and as such was never an officially produced rifle by Izhmash on it's own. This may imply that the Krinkov ingame may be either a custom AKM, or 7.62x39mm variant of the AKS-74U carbine produced by another Eastern european country, potentially a Serbian Zastava M92. An equally likely explaination may be that the ingame weapon may have been a domestically sold 7.62x39mm pistol that has been illegally modified for select-fire capabillity and rifle stocks.
"Krinkov" is a nickname of (presumable) Middle-Eastern origin used to call the AKS-74U in the United States. This term is now commonly used as a slang name to identify all shortened AK variants.
Despite being a carbine, it is noted as a sub-machine gun in-game alongside the Para.