Winters, if you are going to use the sig 516 while on duty, you might want to consider another SBR. I would suggest a LMT, LWRC, SCAR16s or even a DI SBR like a Daniel Defense MK18. I just looked into ordering a Gen 2 Sig 516 in FDE, but I will pass on it unless I can find it for dirt cheap. The Sig 516 is very problematic, the gun doesn'y cycle properly half the time and you will run into problems like failure to eject, failure to feed, etc. I would not trust the sig 516 to be a duty worthy or SHTF gun.