While that's possible, drilling is a little trickier than it would appear. We generally work with customers to swap sizes if we don't nail the size on the first try. Originally Posted by georgeib Could I start smaller and then drill it larger if necessary like your gas block inserts?
Black River Tactical BRT OPTIMUM Hammer Forged Chrome Lined Barrels - 11.5", 12.5", 14.5", 16" BRT EZTUNE Preset Gas Tubes - PISTOL, CAR, MID, RIFLE BRT Bolt Carrier Groups M4A1, M16 CHROME BRT Covert Comps 5.56, 6X, 7.62
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