Geissele Cold Hammer Forged 5.56 NATO 10.3" 1:7" 1/2x28 Chrome Lined Barrel 05-2987

Geissele Cold Hammer Forged 5.56 NATO 10.3" 1:7" 1/2x28 Chrome Lined Barrel 05-2987 is the shortest length in this CHF barrel line, cut for pistol and SBR builds where every inch of length trades directly against maneuverability.

This 10.3" CHF Barrel carries a 1:7 twist chambered in 5.56 NATO, machined in Geissele's tapered profile and paired with a carbine-length gas system through a .750" gas block diameter and .075" gas port. Chrome moly vanadium steel forms the base material, chrome-lined bore included, so heat and corrosion resistance stay high even at this shorter length where gas systems tend to run hotter and faster than longer configurations.

Cold Hammer forging isn't just a manufacturing detail here — it's the reason this barrel holds accuracy well past the round counts where a cheaper barrel starts opening up. M4 feed ramps keep feeding reliable across magazine types, and a manganese phosphate finish adds a second layer of corrosion resistance on top of the chrome lining. Every Geissele barrel at this length goes through High Pressure Testing and Magnetic Particle Inspection before it ships.

Key Features:

• 10.3" length, 1:7 twist, 5.56 NATO chamber
• Cold hammer forged rifling, chrome-lined bore
• Geissele Taper Profile contour
• Carbine-length gas system, .750" gas block diameter, .075" gas port
• Chrome moly vanadium steel construction
• Manganese phosphate finish
• M4 feedramp barrel extension
• High Pressure Tested and Magnetic Particle Inspected

This Geissele Cold Hammer Forged 5.56 NATO build fits builders working on their shortest platforms — worth noting a barrel this length puts the resulting rifle under NFA regulations unless configured as a pistol.