- Mar 10, 2009
Yes, you are right, except the magazine. There are a whole range of whacky fore-grips and folding stocks that are commercially available (for civilian guns) than can be changed anytime. The same applies here. I think the SIG-551/556 here has a shorter 20 round magazine, but I am not sure.
Your Idea is right but over all looks are similar to SIG-551/556