RIFLE: AERO PRECISION MODEL M5 - RIFLE, SERIAL NUMBER US116674, BLACK (MATTE), CASE NOT INCLUDED, SEMI - AUTOMATIC, 308 WINCHESTER, 18 Notes: Aero Precision M5 .308 Winchester Semi-Automatic Rifle The Aero Precision M5 is a semi-automatic rifle chambered in .308 Winchester. This example features a black matte finish and an 18" barrel. The case is not included. Firearm Details: Manufacturer: Aero Precision Model: M5 Action: Semi-Automatic Caliber: .308 Winchester Finish: Black Matte Barrel Length: 18" Case: Not Included Serial Number: US116674 This Aero Precision M5 is chambered in .308 Winchester and features an 18" barrel with a black matte finish. The original case is not included.