The Geissele 5.56 Nato 13.9" 1:7 Midlength Cold Hammer Forged Chrome Lined Barrel is built for shooters who demand consistency from their AR-15 platform. Precision machined from chrome moly vanadium steel and cold hammer forged, this 13.9 inch barrel features a Geissele taper profile, chrome-lined bore, and a durable phosphate exterior finish for long service life and dependable accuracy.

This mid-length gas system barrel uses a .750 gas block journal, M4 feed ramps, and a 1/2x28 threaded muzzle, making it ready for your preferred muzzle device or suppressor mount. With a 1:7 twist rate optimized for common 5.56 Nato bullet weights, it is well suited for range use, training, and competition-focused builds where reliability and repeatable performance matter. Each barrel is high pressure tested and magnetic particle inspected, reflecting Geissele’s reputation for careful craftsmanship and rigorous quality control.

Key Features:

• Manufacturer: Geissele
• Model: 5.56 Nato 13.9" 1:7 Midlength Cold Hammer Forged Chrome Lined Barrel
• Caliber: 5.56 Nato
• Barrel Length: 13.9"
• Twist Rate: 1:7
• Gas System Length: Midlength
• Gas Block Diameter: 0.750"
• Muzzle Thread Pattern: 1/2x28
• Barrel Profile: Geissele Taper Profile
• Barrel Construction: Cold Hammer Forged Chrome Moly Vanadium Steel
• Bore Treatment: Chrome Lined
• Barrel Extension: M4 Feed Ramps
• Testing: High Pressure Tested And Magnetic Particle Inspected