Heres a pulse rifle I made a few years ago, I got hold of a chinese thompson and built the parts around it. I made a few improvments along the way as in the strap attachment on the front. Welded steel triangle part and the stock was welded dexion with a plastic butt. It served me well during my skermishing days. I also made a deeper mag holder for a hi cap mag. Also it doesnt creek when you handle it. the master was made in 6mm styrene sheet then cast in resin. I've been thinking of doing a fibreglass shroud but in truth the resin seems to me well up to the job.