Description
H&K HK MR556 A4/A5 16.5″ Barrel
This 16.5″ factory H&K MR556 A4 barrel is cold hammer-forged from high-quality steel for exceptional durability, accuracy, and longevity. Manufactured to Heckler & Koch’s exacting standards, it features a 1:7 twist rate, optimized for a wide range of 5.56 NATO ammunition. Perfect for replacing a worn barrel or building a precision MR556/416-style upper.
Compatible With:
- HK MR556 A4
- HK 416 A5
