Blackhole Weaponry Barrels ?

[Eye Patch]

Looks like they switched from enfield to polygonal rifling sometime in the past 6 mos (which is just a slight change of the broach profile).

WHEW! You'll get my hospital bill ....... I read this and laughed *SO* hard, I fell outta my chair and broke something - tears running down my cheeks!!!!!

Enfield rifling is neatly RIPPED into the interior surfaces of a rifle barrel - a series of dies with progressively increasing dimensions that are "dragged" thru the bore until there are small grooves and larger lands .... With a slightly smaller diameter of bore than bullet, the 50 - 60,000 psi explosion forces the ...........

Polygonal "rifling" doesn't use a "broach" at all. The process - in the rough stage - uses a formed rod - with precise bore and polygonal "bulges" - and they are slight. The barrel & rod - locked together - are loaded into a "rotary hammer forge" and this quasi-medieval machine - uniformly - pounds the ever-lovin' be-jeez outta the exterior of the rough" barrel, conforming the interior to the sized rod .... Boom! Dead-smooth bore with the unmistakable absence of grooved "rifling" - but with that unusual "lobed" look to where Mr. Bullet slides thru when fired.

My 14.5" heavy barrel is enfield rifled, but I have had a HK in the past that was poly. I don't think the difference between the enfield and the poly is all that significant, but they're both easier to clean than conventional as the lands aren't recessed and therefore don't collect as much crud.

HUGE difference!!! No brushes needed with a polygonal barrel - ever! Why? No grooves that bite into the bullet and scratch away copper or lead. They can be made clean like a whistle with a solvent-wetted patch. Let the solvent do it's thing, then run a few dry patches. When they come out spankin' clean .... VOILA!

The quality of my 14.5" is top notch. The ground surfaces are dead nuts on dimension and fit my upper with just the right amount of tension (you couldn't easily pull the barrel out once seated - and that's before the nut ever came close to it, but you didn't need to drive it in either).

This thing also shoots better than me. With shitty optics and bad ammo (wolf and cheap federal) putting a 5 round group into a quarter was not difficult at 50yds. Now if I had some real glass on it, and some bullets worth mentioning, I'm certain ragged holes would be the norm. It's also not a floated barrel. For the shortest gun I could build without a tax stamp, she's a tack driver.

I'd love to see a stainless Blackhole against a stainless Noveske barrel head to head.

They're same - same .... 'cept Noveske's are brutally expensive. Are they still in business since their owner passed away?

I have a Black Hole Weaponry 16" M4 profile 300 Blackout barrel. On accurate re-loads, my 10-round 50 yard groupings are easily covered by a golf ball.

I have a 16" carbine-ported M4 profile in 5.56 and an 18" mid-length ported 5.56 and basically took a perfectly good "Enfield" rifled 16-inch barrel from a high quality manufacturer (Ha! "Assembler"!) And, after taking off the pinned-on FSB so I could remove the barrel nut / delta ring assembly - just threw it in the trash .... Yeah, the polygonal rifled barrels are THAT much superior.

BTW, someone noted they saw some BHW's at a gun show and wasn't impressed - "cheap" steel, unlined bores, yadda, yadda."

Black Hole Weaponry uses highest quality 416R ('R' for rifle or "ordinance" grade), stainess steel, with a "melonite"-type coating on the interior / exterior. The bores are as shiny & slick as snot on a doorknob ........

Based on my 5.56 & 300 Blackout barrels from Black Hole Weaponry, if I were doing another Upper build and they had the caliber I wanted, they'd be *my* first choice - based on 100% satisfaction.

As always, Y.M.M.V.