This is a great conditioned SIG556 chambered in 5.56. This is the model that features a folding stock and an updated forearm grip. This is a piston rifle with Magpul stock. This rifle shows very little wear. This will come with original 6 Sig Sauer AR mag and connector in original box and UTG red dot and what you see pictured. This gun, as you can see in the pictures, is in great shape with little signs of use or abuse. These rifle is very rare and hard to find with the original folding stock. This is the closest I can get to make it look like the legendary performance and accuracy of the Swiss-built SG 550 tactical rifle. This gun functions perfectly.