Geissele Automatics 5.56 NATO 11.5" Barrel Carbine-Length Gas - Maganese Phosphate Finish

Geissele Automatics 5.56 NATO 11.5" Barrel - Carbine-Length Gas - Maganese Phosphate Finish

Geissele barrels are precision-machined and cold-hammer-forged using the highest-quality materials at their state-of-the-art facility in North Wales, PA, to ensure the highest quality and consistency in each barrel. Their barrels are High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI). The accuracy and reliability of Geissele CHF barrels make them an ideal choice for a hard-use duty weapon, a precision-tuned competition gun, and everything in between.

Featuring Geissele's proprietary Taper Profile, this barrel intelligently distributes weight to enhance barrel stiffness and thermal stability without adding unnecessary front-end bulk. The interior bore is lined with heavy-duty chrome for superior corrosion resistance and extended throat life, while the exterior is protected by a tough manganese phosphate finish. Tuned with a mid-length gas system and a precise .081 gas port for smooth, reliable cycling with or without a suppressor, every barrel is High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI) to guarantee flawless structural integrity.

Features

Cold Hammer Forged (CHF) Construction:
Forged under immense pressure from Chrome Moly Vanadium steel to create a dense, highly durable molecular structure capable of handling extreme heat and rapid firing schedules.

Heavy-Duty Chrome Lined Bore & Chamber:
Provides maximum corrosion resistance, reduces friction, and significantly extends barrel life under continuous high-volume use.

Geissele Taper Profile:
Optimized profile distribution maximizes barrel rigidity and heat dissipation where it matters most, reducing POI shift while preserving lightweight front-end handling.

Mid-Length Gas System Architecture:
Delivers a smoother recoil impulse, reduced bolt carrier velocity, and lowered internal component wear compared to traditional carbine-length gas systems.

HPT and MPI Inspected:
High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI) to identify microscopic flaws and ensure total reliability under pressure.

Precision M4 Feed Ramps:
Includes factory-cut M4 feed ramps to ensure reliable, smooth cartridge feeding from the magazine into the chamber.

Manganese Phosphate Outer Finish:
Heavy phosphate coating shields the outer steel surface against abrasion, harsh moisture, and chemical exposure in demanding field environments.

Specifications