The IC SPR variant utilizes the same Cold Hammer Forged spiral fluted barrel as the IC Enhanced. The SPR employs a low profile fixed gas block for the piston system and a longer 12 inch user-configurable modular rail system. Topped with our low profile Skirmish Sights the IC line of rifles is the latest evolution in the LWRCI 5.56 rifle.The IC-SPR is our flagship and most popular model. This is a great all-around 5.56 rifle that utilizes LWRC's most popular features; fluted barrel ambi controls and SPR modular rail system.The IC-SPR can be fired suppressed. If you plan to shoot suppressed often the IC-E may be a better option as it has an adjustable gas block. Caliber: 5.56 NATO Barrel Length: 16" Sights: LWRCI Skirmish Magazine: Magpul 30 rd. P-Mag Muzzle Device: LWRCI High Efficiency Flash Hider 1/2x28 TPI