Aero Precision 12.5" 5.56 CHF Midlength 1:7 AR-15 Barrel

Aero Precision 12.5" 5.56 Cold Hammer Forged Midlength 1:7 AR-15 Barrel The Aero Precision 12.5" CHF 5.56 Midlength Barrel is a rugged, duty-ready option for builders who want maximum barrel life and consistent performance in a compact AR-15 setup. Each PRO series barrel is cold hammer forged from 4150 CMV and finished in Melonite (nitride) for excellent corrosion resistance and long-term durability. The mid-length gas system helps smooth out cycling compared to shorter gas setups, and the 1:7 twist supports a wide range of common 5.56 bullet weights. Aero also adds a single-point gas block dimple, providing a solid bedding surface for set screws and making gas block alignment easier during installation-an especially useful detail on hard-use builds. Features Cold hammer forged construction for long service life 4150 CMV steel with nitride/melonite finish for corrosion resistance Mid-length gas system for smooth cycling in a compact barrel length 1:7 twist for broad bullet-weight stability Single-point gas block dimple aids set-screw bedding and indexing .750 gas block journal and 1/2x28 threads for common components Specifications Finish: Nitride / Melonite Cartridge Compatibility: 5.56 NATO Barrel Length: 12.5" Gas System Length: Midlength Gas Block Journal: 0.750" Twist Rate: 1:7 Muzzle Thread Pattern: 1/2x28 Platform: AR-15