LWRC's IC-A5 is built for high performance and is constructed using the highest quality materials. It is designed with a low profile, 2-position adjustable gas block allowing the shooter to compensate for running a suppressor with the added benefit of a longer modular rail system. The upper rail section is a special cutback version, which allows the use of the low profile gas block and at the same time keep the full 12" modular rails available on the sides and bottom of the hand guards. Its dual control fully ambidextrous lower receiver includes bolt catch and release, magazine release and fire control access from both sides. The cold hammer-forged barrel is NiCorr treated and spiral fluted, while the Nickel-boron coated bolt carrier delivers unparalleled wear resistance, corrosion resistance and permanent lubricity. The IC-A5 comes complete with, LWRCI Skirmish back-up iron sights, an ambidextrous charging handle, LWRCI adjustable compact stock, a Magpul MOE+ grip, and A2 Birdcage flash hider. This model has a 16.1" barrel and a black metal finish.. DETAILS CALIBER 5.56 NATO - BARREL 16.1 (40.9cm) - WEIGHT 7.3 lbs (3.31kg) - LENGTH 32-35.25 (81.3-89.5cm) - MUZZLE THREADS 12x28 TPI - RIFLING 17 RH