I was going to do some drastic changes to my S&W M&P 15T,but decided to start small instead. I have found a two point sling by Troy industry that I'm going to buy. I was looking at the hand guard on my rifle and there appear to be threaded holes on there. Does anyone know if they are ment for a swivel stud and if so can someone recommend a good set of swivel studs instead of the picatinny mounts.