The ARX160 comes chambered in 5.56 and .22lr, our test model was chambered in .22lr. Everything is almost exactly the same, except for the caliber obviously. The rifle has a folding stock that is adjustable in length, pop up sights, full picatinny rail with a flat top that accepts all types of accessories, flash suppressor etc.. What sets this rifle apart from others in it's "class" is the ambidextrous charging handle and safety selector switch. Similar to the FN SCAR, this gun allows the shooter to change positions of the charging handle to best suit the shooter. The selector switch can be changed with either hand as well. The folding stock can be locked to the side and fired still.