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
Exactly a button is a button, the company making the button more than likely already has a 30 or 45 degree cutter. You pay for the button and pull it through the barrel just as fast as a 4 or 6 groove. So that part is BS that being said I would rather use 5R or 3R rifled barrels than square Enfield type rifling. Less deformation, better seal, less copper fouling and with 3R less engraving force leading to lower peak pressure..
- Will
General Performance/Fitness Advice for all
www.BrinkZone.com
LE/Mil specific info:
https://brinkzone.com/category/swatleomilitary/
“Those who do not view armed self defense as a basic human right, ignore the mass graves of those who died on their knees at the hands of tyrants.”
Lothar Walther and HK (G3, 33, 53, 93, 51, 91)use a true polygonal rifling in rifles, Glocks are poly.
Every barrel is a polygon so any barrel maker can claim their barrels are polygonal but some are really 4R or 5R and just called polygonal, I believe Noveske barrels were an "R" type.
Boots Obermyer was probably one of the first in the US to use 5R then Mike Rock, he made many of the military 5R sniper barrels installed on the Rem M40. Bartlein makes 5R barrels, Krieger, T/C, I made 5R and 3R barrels for ARs and now Faxon does.
Attachment 68412
Attachment 68413
ETA- I've never heard the term "button dragged", buttons can be pulled or pushed, Wilson Arms (not Wilson Combat)pushes buttons, every other company I know of pulls their buttons.
Last edited by constructor; 06-24-22 at 17:01.
- Will
General Performance/Fitness Advice for all
www.BrinkZone.com
LE/Mil specific info:
https://brinkzone.com/category/swatleomilitary/
“Those who do not view armed self defense as a basic human right, ignore the mass graves of those who died on their knees at the hands of tyrants.”
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