RS M2 Carbine weapon labeled as an M1

So I'm in the final stages of developing the M2 Carbine, I've decided that if possible an Engineer weapon. The problems are that the M2 will only display itself as an M1 carbine/Springfield in game when picked up or selected,the roles don't show up, the description, and it is quite glitchy in the selection screen. I can spawn with it perfectly fine, just that this is the only issue left. I honestly have no idea why this is happening. I'll post some screenshots of the issue later today.