The Sons of Liberty Minuteman M4-EXO3 Series are built with duty and service at their core. These firearms are available as a pistol with an 11.5" barrel, a rifle with 13.7" barrel, and a rifle with a 16" barrel. All Minuteman M4-EXO3 are outfitted with a 4150CoMOV barrel with a 1:7" twist. The Minuteman M4-EXO3 series also features a proprietary Liberty Fighting Trigger and an ambidextrous Liberty Charging Handle. Other features include a full length handguard with lightening cuts for greater rigidity and reduced weight. Features of the Minuteman M4-EXO3 Series: Available as a pistol with an 11.5" barrel, a rifle with 13.7" barrel, and a rifle with a 16" barrel 4150CoMOV barrel w/ 1:7" twist Liberty Fighting Trigger Liberty Charging Handle (ambidextrous) Sons of Liberty Gun Works SOLGW "Minuteman" EXO3-M 5.56mm 11.5" Pistol M4-EXO3-M-PISTOL-11.5