M110 Precision Match Grade 20" Barrel Kit with 4150 5R barrel in 11.25 twist

This is our M110 Precision Match Grade 20" barrel kit, built to the Army M110 SASS barrel specification: 4150 chrome-moly-vanadium steel, 5R rifling profile, 1:11.25" twist rate, .308 Winchester / 7.62 NATO chamber, and a contour that matches the original KAC M110 barrel profile. This is the correct barrel length, twist, and profile for a clone-correct M110 SASS build firing 175gr Mk316 Mod 0 or comparable match ammunition.

The 5R rifling reduces bullet deformation and fouling compared to conventional 6-groove cut rifling, extending barrel life and preserving accuracy at the sustained rates an M110 sees in designated-marksman use. The 1:11.25" twist is optimized for 175gr–178gr match bullets — the Army's Mk316 load — and will also stabilize 168gr Sierra MatchKing in cold weather.

Kit includes the complete chambered and profiled barrel, low-profile gas block, mid/rifle-length gas tube, and the KAC-pattern muzzle device interface required to mount a KAC M110 QDSS suppressor. Drop this into an SR-25-pattern upper and you've got a barrel that will hold ½ MOA with good ammunition.

Order yours today and build an M110 that shoots as good as it looks.