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  #1  
Old 03-20-2017, 09:07 AM
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Steel Buffer Tube


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Does anyone know where I can get a steel A2 buffer tube?
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  #2  
Old 03-20-2017, 09:20 AM
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They're not made of steel. They're made of aluminum. They thread into an aluminum receiver. If something breaks and you have steel threaded into 7075 aluminum, the aluminum receiver will most likely be the part that breaks. A buffer tube/receiver extension is one easily replaceable part if it bends or breaks somehow. A lower receiver is not. Just stick with aluminum. It's what every high end manufacturer uses.


And to my knowledge nobody makes a steel buffer tube. As it is almost pointless. It'll just add weight and solves no points of failure.

http://www.brownells.com/rifle-parts...prod73362.aspx

Here is an A2 tube assembly. If you just need the tube they sell those alone as well.

Last edited by Trent12; 03-20-2017 at 09:23 AM.
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  #3  
Old 03-20-2017, 11:58 AM
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never seen a steel one
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  #4  
Old 03-20-2017, 12:00 PM
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just out of curiosity why would you want steel? if it's weight you need they sell weights for the buttstock.
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  #5  
Old 03-20-2017, 12:03 PM
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Quote:
Originally Posted by Monster50 View Post
Does anyone know where I can get a steel A2 buffer tube?
I'm going to assume you want one for any increase in strength. To that end, Strike Industries makes a collar that threads into the lower, while the buffer tube threads into the collar.

EDIT: https://www.strikeindustries.com/sho...end-plate.html
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Last edited by nvshooter; 03-20-2017 at 12:08 PM. Reason: Add the EDIT...
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Old 03-20-2017, 01:23 PM
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I wonder if the problem might be galvanic transfer between dissimilar metals?
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Old 03-20-2017, 03:11 PM
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Doubtful. No more than the much hypothesized but rarely seen GC between the BE and the upper.
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  #8  
Old 03-20-2017, 04:29 PM
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The reason I want steel is, due to the power of the rifle I'm building. It's being built on the AR platform with a 50 BMG upper. I have a single shot lower. No mag well. If there is a problem with the buffer tube, it could be very bad with the recoil of the BMG round. I found one company the used to sell a steel A2 buffer tube but the company that made it for them stopped making it. As for the weight, with a gun that weighs over 25 lbs, a few ounces won't make a difference.
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Old 03-20-2017, 05:42 PM
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You are talking about an AR type in .50 BMG? I never heard of that.
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Old 03-20-2017, 05:53 PM
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Originally Posted by 60DRB View Post
You are talking about an AR type in .50 BMG? I never heard of that.
+1. I've seen some .50 Beowulf uppers before. If it's a .50 bug I doubt it is using the buffer tube like an AR for the recoil spring. It's probably just to mount the stock. I still don't think there will be any problem with the aluminum.
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Old 03-20-2017, 06:19 PM
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The bolt still goes into the buffer tube when chamberring the next round.
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Old 03-20-2017, 08:54 PM
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Originally Posted by Monster50 View Post
The bolt still goes into the buffer tube when chamberring the next round.
I'm assuming it's a bolt action or some sort of straight pull action? Not semi automatic?

If so, a standard aluminum A2 tube should hold up just fine. They're stronger than you think. If not, you can try the aluminum till you can find a steel one. They're not expensive. You should be able to find a mil spec aluminum A2 tube for $30 or so.

I'm interested in this rifle you're building. Got any photos or a link to one?

Last edited by Trent12; 03-20-2017 at 08:56 PM.
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  #13  
Old 03-21-2017, 04:32 AM
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Still building it, will post pics when finished. I'm still waiting for my Ghost Gunner milling machine to be delivered. When that comes I can get the 80% lower finished. Also need to make a custom butt plate for the butt pad, powder coat it and a few other pieces. Still looking for a gun case that will handle a gun this size and weight. Probably have to get a custom made gun case. $$$ Already have $2500 into it and still need a bipod, powder coat, and a case. The case will probably cost over $400. Not to mention $500 for 150 rounds of ammo, $300 for reloading equipment, $400+ for powder and primers, and $200 for bullets. And I still can't shoot it yet. Probably have it done in a month give or take. But still won't get to shoot it due to going in for a knee replacement. Might get to shoot it in 2-3 months.
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Old 03-21-2017, 09:26 AM
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I've seen a bolt-action .50BMG built on an AR lower. If I recall, the lower had the fixed A2 stock and was used with the .223Rem upper when not used with the BMG upper.

I'm thinking Monster50 is wanting a steel buffer tube because he is concerned about the recoil energy generated by the cartridge. For all I've read, a .50BMG recoils much like a 12-gauge shotgun shooting heavy buckshot loads. If the rifle is placed in a machine rest up front and an owl-ear bag in the rear the recoil will travel primarily along the line of fire, and there wouldn't be all that much radial energy to cause bending of the tube where it's threaded into the lower receiver.
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Old 03-21-2017, 11:18 AM
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The 50BMG uppers are bolt action, and are sold as uppers, or complete rifles, and are either single shot, or with a magazine. Actually, they are rather common! I WOULD NOT care to fire one with a collapsible stock, however! Since the recoil force will be pretty much straight back, I don't think I'd worry too much about any damage to the tube.
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  #16  
Old 03-21-2017, 04:22 PM
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These .50BMG uppers can be quite attractive. They come in such nice colors. Lefthanded bolt is a no-charge option. Cool!

The Ferret50 50BMG rifle conversion for the AR-15

.50BMG conversion on AR-15 carbine lower: http://www.ferret50.com/gallery17.html
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Last edited by nvshooter; 03-21-2017 at 04:32 PM. Reason: Add link to conversion on AR-15...
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  #17  
Old 03-22-2017, 12:22 AM
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Wow!

Not sure I need one, but very cool.
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  #18  
Old 03-22-2017, 04:56 AM
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It's not always about need. This is something I've always wanted. Had a decent tax return and profit sharing, so I said why not.

I got the Safety Harbor SHTF 50 BMG Single Shot. Upgraded from the 18" to the 29" barrel. $1585 with shipping.

Safety Harbor SHTF 50 BMG Single Shot Upper Conversion - 50 BMG AR-15 Uppers
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  #19  
Old 03-22-2017, 12:34 PM
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I'm building a steel buffer tube from 1 inch conduit. The Inside diameter is about right for it. I custom made a screw in adapter for the rear of the receiver out of steel and plan to braze the conduit into it. I never liked aluminum for much of anything and the few ounces difference in weight is of no concern to me. The Steel is much stronger in my opinion.
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  #20  
Old 03-22-2017, 06:34 PM
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Originally Posted by Mecanik View Post
I'm building a steel buffer tube from 1-inch conduit. I custom-made a screw-in adapter for the rear of the receiver out of steel and plan to braze the conduit into it.
We'd like to see pictures of it when you finish it, please.
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