LWRC M6IC IC-A2 rifle designated the ICA2R5B14P with a low profile gas block, flip up sights, ambi charging handle, ambi magazine release, ambi selector, slide release, and features a quad picatinny rail with rail scales. Very cool rifle, LWRC makes some of the best rifles and their piston rifles are amazing, like this one. brand new. This has a 14.7" pinned legal length barrel, not NFA.