You can't.
This cmd forces you to go jugger with m4a1.Code:cmd mr [magicnumber] 9 axis
but how can you change the weapon to another one like rsass or some light machine gun?
You can't.
The lazy way is at the start of the game do a force jugg then change class. after that you die it vanishes. eh normally jug + LMG + aimbot + shield = fine for quite a while tho