I have a norinco SKS, new, not preban. I bought a pin on break and it blew off the first round, they sent me a replacement and again, one round and it was GONE. So they gave me a credit and I bought a twist lock break. it locks around the sight post and works fine. My question is dose this break have to be preminantly mounted?? I can weld it but do not want to if it is not required. if it matters I have done nouthing else to this gun no grip nouthing, just this break.