Green Mountain barrels have been winning matches and setting records from the beginning, more than 25 years ago. These barrel blanks offer quality and craftsmanship that is hard to match. From their tapered octagon rifle blanks to their heavy contour muzzleloader blanks, each piece is made to exacting standards for a lifetime of service.
Barrel is straight octagon measured across the flats
8 Grooves .009" Depth
Requires Polishing and Application of the Finish of your Choice
Breech Block Sizes
32 and 36 Caliber blanks with a 13/16" or 7/8" width have a 9/16-18 thread breech
40, 45, 50 and 54 caliber blanks with a 13/16", 7/8" or 15/16" width have a 5/8-18 thread breech
45, 50 and 54 caliber blanks with a 1" width have a 3/4-16 thread breech
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Green Mountain Barrel Blank 45 Caliber Muzzleloading Black Powder Rifle 13/16" Straight Octagon 1 in 66" Twist 36" 1137 Chrome Moly in the White