The 80's and 90's saw major changes to the modern duty rifles carried by US forces. Most notable the adoption of the carbine gas system and shorter barrel over the longer rifles. These advancements where directly related to the requests from special forces units such as SOF-D, Army Rangers, and Navy SEALs.
Upper: TNTE 7075-T6 A2 with Black Type III hard coat
Barrel: TNTE 16" 5.56 1/7 4150 Chrome Lined barrel with 1/2x28 thread
Gas System: Mid
Gas Block: Pinned on standard height A2 FSB
Handguard: Two Piece Carbine
Flash Hider: A2
Charging Handle: None