#No Knock Back (NO 35)
;no shotgun knock back
;no grenade knock back
0x005F0130 0xFFFFFFFF
0x005F0308 0xFFFFFFFF
0x005F04E0 0xFFFFFFFF

you dont get knocked back from:
grenades and shit
and you dont get knocked back from shotguns
or you can just turn off 1shot and you wont get knocked back from shotguns