If you really want to do this, try a reduced power (RP) buffer spring.I don’t know if they were improperly sized though because I can shoot them in my gun without any hiccups whatsoever!
You're not making any permanent changes to the rifle.
Assuming carbine buttstock system ?
https://www.gunsprings.com/COLT/AR-15, CAR-15, M-16, M4, 9mm SMG AND SPORTER/cID2/mID1/dID79#490
For a permanent change, you can open up the gas port in barrel.
I don't recommend this unless you know what you are doing and have determined that the gas port diameter is too small for that particular "gas system length".
You enrich Putin and his cronies if you buy that Russian crap ammo.
Americans are buying it, I see the steel cases all over the public shooting areas.