Try flute ultr match barrel 11.5” 1-8 twist
Yankee Hill Machine carbine handguard
Custom gas length with adjustable tube via grub screw.
DPMS upper and bolt group.
Work done by Robbie Tiffen, one of the first 300BLK in country as I imported the reamer and built two.
Shoots well with 110vmax and 180sst subs. Under 1” at 100m in the right hands.
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