Geissele Cold Hammer Forged 5.56 NATO 12.5" 1:7" 1/2x28 Chrome Lined Barrel 05-2988

Geissele Cold Hammer Forged 5.56 NATO 12.5" 1:7" 1/2x28 Chrome Lined Barrel 05-2988 takes the same forging process behind Geissele's full-size barrels and applies it to a length built for shorter-barreled builds that still need to hold accuracy under pressure. Cold hammer forging compresses the rifling into the bore rather than cutting it, producing tighter, more consistent lands and grooves than button or cut rifling typically achieves.

This 12.5" 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 tuned specifically for this barrel length. Chrome moly vanadium steel forms the base material, chrome-lined bore included, so the barrel holds up to heat and corrosion across sustained strings of fire rather than degrading after a few hard range sessions. Every Geissele 12.5 barrel at this length goes through High Pressure Testing and Magnetic Particle Inspection before it ships, catching material flaws early rather than leaving them to surface downrange.

M4 feed ramps keep feeding reliable across magazine types, and the manganese phosphate finish adds a second layer of corrosion resistance on top of the chrome lining. This 12.5" CHF barrel is built short enough for compact SBR and pistol configurations while holding to the same manufacturing standards Geissele applies across its full lineup.

Key Features:

• 12.5" length, 1:7 twist, 5.56 NATO chamber
• Cold hammer forged rifling for consistent accuracy
• Geissele Taper Profile contour
• Carbine-length gas system
• Chrome moly vanadium steel, chrome-lined bore
• Manganese phosphate finish
• M4 feedramp barrel extension
• High Pressure Tested and Magnetic Particle Inspected

This Geissele barrel brings full-size durability standards to a shorter platform, built for shooters who need dependable accuracy in a compact configuration — reference 05-2988 for ordering.