50 Beowulf build anything I'm missing?

You mabe looking at a different barrel than i am, but the brownells 12.7x42 (50 beo) uses a .936 gas block.
Other wise looks like your good!

I've used Brownells matched barrel and bolts, I'd be pretty confident the headspace will be spot on, BUT if you can find a Smith or shop locally who has the guages and they aren't too expensive, might as well have it checked.

Your upper should be headspaced to a standard mil-spec bolt so I would not worry. A straight case headspaces on the case mouth and is not as critical as a bottle necked case.

Kp321 said:

Your upper should be headspaced to a standard mil-spec bolt so I would not worry. A straight case headspaces on the case mouth and is not as critical as a bottle necked case.

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Headspace is MORE critical, or should I say as critical but harder to achieve, with a straght case as with one that has a shoulder to headspace from. BUT, most uppers should be spec'ed to a standard bolt, so checking it is best done if you have problems with lockup, or rounds not going off when the trigger gets pulled. Otherwise don't worry about it.

What could one do if the headspace was wrong? Let us consider that it is too long.

Demi-human said:

What could one do if the headspace was wrong? Let us consider that it is too long.

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Pull the barrel off, take the extension off, turn the shoulder back the required distance to bring it into spec (and possible the breech face of the barrel too, with re-chamfering the chamber lead depending how out it is). reassemble. If its too short you simply run the chamber reamer in a bit deeper.

^ yep and one uses go/no go chamber gauges to see that they have gone far enough and/or too far.

A straight case headspaces on the case mouth and is not as critical as a bottle necked case.

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Like a 45 ACP but there are also some like 38 and 357 that go of the rim. This is why you can shoot a 38 out of the deeper 357 chamber, it won’t “fall in”.

Neither of these are like the 50 beo though, it’s a tapered case.

lobo9er said:

I think I'm set I got mine from midway specs say .875 you did make me check though lol
Also thats what I thought about head space on a AR but wasn't sure. Appreciate the replies!

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Doh I'm an idiot, not sure why I thought u were getting yours from brownells. Ignore me, and carry on lol

mcb said:

Pull the barrel off, take the extension off, turn the shoulder back the required distance to bring it into spec (and possible the breech face of the barrel too, with re-chamfering the chamber lead depending how out it is). reassemble. If its too short you simply run the chamber reamer in a bit deeper.

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Oh.

Dang.

on a finished barrel, wouldnt you at least need to take off one full revolution to bring the gas port back to top?

Correcting headspace on an AR15 is easy. Step one is measure the bolt to make sure the bolt face to locking lug distance is correct. Step 2 is send the barrel back to wherever it came from.

LoonWulf said:

on a finished barrel, wouldnt you at least need to take off one full revolution to bring the gas port back to top?

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Oh yeah good point I forgot about the gas port, Been working on bolt guns most recently. That is going to make that much much harder to fix an overly-deep chamber. Of it's not a pinned gas block I suppose you could drill a new gas port in line with the barrel extension position and let the gas block plug the old one. Or take that whole turn off as Loonwolf suggested and then treat it like a short chamber, not an optimal solution in either case.

That said how many finished barrels have you guys bought that are out of head space? If the manufacture makes them with a barrel extension then they should have made them to the correct head space assuming your using the same bolt they did. This is why a lot of the odd ball AR barrels are bought with the same manufacture's bolt so that you know the head space is correct. If I was buying an AR barrel for a cartridge that did not use a standard 223/556 bolt I would definitely be buying the bolt from the same manufacture.

lobo9er said:

awesome info guys thanks I am excited to get this project on the way. I pipe dream a lot and come on here with gun project ideas from time to time that never end up happening so its nice to see this one about to start. In fact when searching for beowulf info I came across an old thread where I was looking for this same info from 5 or so years ago that I completely forgot about.

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I do stuff like that too lol!

I have done that too! Good luck on your 50.

Nice to see what people are using. I'm building a 50 Beowulf as well using the Brownells barrel and bolt. Just need a handguard and sights now. Though I'm considering moving to red dots for non magnified rifles now that I'm at that complicated glasses stage of life.

Was considering 458 Socom, but the wife cast her vote for Beowulf as having a much cooler name so what could I do?

Demi-human said:

What could one do if the headspace was wrong? Let us consider that it is too long.

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https://www.thehighroad.org/index.php?threads/ar15-new-build-and-possible-headspace-issue.824277/

After reading this, i would always check headspace with gauges.

That is midway USA's house brand. Its all stuff made by someone else but I don't know who. Actually about 2/3rds of the AR parts on the market are not made by the company selling them. There is alot of contract manufacturing and re-branding in AR parts.

lobo9er said:

Anyone know who makes the barrels Midway sell? Labeled AR stoner barrel... Is AR stoner a manufacturer or just generic way of saying AR stoner rifle design barrel?

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i would guess generic, after doing Google? https://www.ar15.com/forums/ar-15/Who_makes_AR_Stoner_barrels_/118-694531/?
From link

I think Liberty/Satern makes ar stoner barrels.

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https://www.saternbarrels.net/and

AR-Stoner is the house brand sold by MidwayUSA, and they get OK reviews. They are made by Moore's Machine Company who also makes Bear Creek Arsenal. Barrels are rumored to made by Satern or ER Shaw. They are very entry level products.

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As with the internet, who really knows? Ask Midwayusa.

From Midwayusa

AR-Stoner
Over the past decade, AR-Stoner has developed a great reputation as a high quality, high value, manufacturer of AR-15 gun parts. Utilizing many of the original designs inspired by the architect of the AR15/M16, Eugene M. Stoner, AR-Stoner continues to evolve with the needs of today’s competition & recreational shooters. AR-Stoner upper assemblies are manufactured in the USA in an ISO 9001:2008 registered facility. AR-Stoner uses CNC machinery, controlled production techniques and mil-spec finishes, resulting in extremely high quality & unmatched reliability. Every part, from the smallest pin, to complete upper assembly, is meticulously inspected for quality at each step in the production process. This attention to detail ensures AR-Stoner Customers can carry their product with the same confidence & pride put into it at the factory.

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