PDA

View Full Version : Extended buffer tube


Taz77
04-30-2008, 6:08 PM
Does anyone make an extended buffer tube for collapsible stocks? I'd like to use my Vltor with a Leupold scope, but the stock and buffer tube I have just isn't long enough for a proper eye relief.

elSquid
04-30-2008, 6:12 PM
Does anyone make an extended buffer tube for collapsible stocks? I'd like to use my Vltor with a Leupold scope, but the stock and buffer tube I have just isn't long enough for a proper eye relief.

Would a buttpad of some sort work (http://www.bravocompanyusa.com/Vltor-Rubber-Buttpad-p/vltor%20amb-1.htm) for you?

-- Michael

Taz77
04-30-2008, 6:15 PM
I got one of those, and it doesn't isn't increase the length by that much. Plus, any extended buttpad would cause my cheek to rest on the sling loop, rather than on the top of the stock itself.

aplinker
04-30-2008, 7:00 PM
Which VLTOR? The EMOD is longer.

Sounds like the issue is the scope mount (eye relief), not the stock.

Taz77
04-30-2008, 7:20 PM
This is the stock:
http://i22.photobucket.com/albums/b331/taz77/Firearms/FAR-1506.jpg

The rings I'm using helped some, they moved the scope about 1/2" towards the front, but it wasn't quite enough. The a2 stock works a little better, but it's not nearly as comfortable. I was just hoping someone makes some kind of extension or spacer like they do for the standard a2 stock, but for the collapsible, and I'm not looking to spend $200 for the LaRue scope mounts.
If no spacers exists... I don't know, maybe I'll just stick with the a2 stock.

WhiteDingo
04-30-2008, 7:25 PM
Just a thought, instead of lengthening the stock, simply move the scope forward more. Ditch the 2 piece riser and mount a "scout rail" instead. This would allow you to mount your rings further forward.

Yankee Hill Machine makes some good ones
( http://www.yankeehillmachine.com/store/rails.html )

As does GG&G
( http://www.gggaz.com/index.php?id=42&parents=38,42 )
( http://www.gggaz.com/index.php?id=151&parents=38,42 )

Blacktail 8541
04-30-2008, 7:27 PM
Try a scope rail, 1/2 the cost or less than a LaRue.

redcliff
04-30-2008, 7:27 PM
Whats preventing you from moving the rear ring forward so that you can move the whole scope forward in its rings? Is that some sort of riser that the ring bases are mounted to?

Mad Geek
04-30-2008, 7:30 PM
Wow! :eek:

Your rifle looks like what I'm waiting on a barrel and an A2 stock to complete. You brought up something that may be an issue for me as well.

I'll be curious to see how this turns out for you. Thanks for posting the question. :D

Fjold
04-30-2008, 7:36 PM
Whats preventing you from moving the rear ring forward so that you can move the whole scope forward in its rings? Is that some sort of riser that the ring bases are mounted to?

+1, Loosen the rings, move the rear ring forward to the forward most slot and then slide the scope forward in the rings.

pc_city
04-30-2008, 8:07 PM
AR-10 CAR buffer tubes are about 1/2 inch longer than AR-15 CAR buffer tubes. I haven't tried the combo of AR-10 tube with AR-15 spring and buffer. It might work for you.
http://dsgarms.com/index.cfm/product/1259_86/ar10-carbine-buffer-tube---receiver-extension.cfm

ar15barrels
04-30-2008, 11:20 PM
AR-10 CAR buffer tubes are about 1/2 inch longer than AR-15 CAR buffer tubes.

Danger will rogers, danger.
Don't do this.

The length of the inside of the buffer tube is important.
The carrier needs to stop not more than 1/4" past where the bolt catch will engage.
Using an AR-10 buffer tube on an AR-15 build will allow the gas key to hit the inside of the charging handle, sending it back towards the shooter's face and damaging the receiver or charging handle latch.
The buffer needs to stop inside the tube before this happens.

You COULD use an AR-10 buffer tube if you put a stack of quarters down in the bottom of the tube to adjust for the difference in length.

aplinker
04-30-2008, 11:26 PM
Danger will rogers, danger.
Don't do this.



Will Rogers:
http://www.loc.gov/exhibits/bobhope/images/vcvg10.jpg

Will Robinson:
http://www.lostinspacetv.com/ART/download/E-Episodes/E16.jpg

ar15barrels
04-30-2008, 11:34 PM
Will Rogers:

Will Robinson:

:yawn:

pc_city
05-01-2008, 6:40 AM
Was was thinking that you could get one of those spacers from MGI and cut it down to about 1/2 in or whatever it needs to be.
http://mgimilitary.com/buffer_inserts.htm
http://mgimilitary.com/images/000_0085.JPG


Or if you had a lathe you could turn your own. Maybe you should put a "big and tall" kit together Randall.;)

maxicon
05-01-2008, 10:02 AM
Interesting rings - what kind are they? I've never seen offset rings for a Picatinny rail before.

There are a couple of good options for this, as others have suggested.

- One-piece mount, like the Armalite. It's about $90, less used, and gives good eye relief with a traditional non-illuminated Leupold. The only problem is it's a bit low, at 1.25" centerline. Some people don't mind this, but it would be much lower than your current setup, and wouldn't allow a BUIS under the scope. Other one-piece mounts are listed here - you'l want one that gives good forward offset and the height you want:
http://www.maxicon.com/guns/optics/one_piece/ar15_onepiece_mounts.htm

- Scout or extended rail with high rings. YHM makes a solid, inexpensive one, and for more, you can get nice ones from GG&G, RRA, ARMS, and others. They're typically 0.5" tall (but some are different, so be sure to check), and you'd want rings tall enough for the total scope centerline you want. Many people like 1.4", which is what the iron sight centerline is, so that would be 0.9" rings on top of the 0.5" riser. Also, some rings are spec'ed to the base of the ring (like Burris and IOR), rather than the centerline (like Leupold and TPS).

A one-piece is sturdier and more repeatable, while a rail with rings is much more flexible, but has more connections to loosen or shift.

aplinker
05-01-2008, 11:34 AM
Again, this is a scope mounting issue, not a stock issue. If you have to be so far back that you can't get proper eye relief at the most extended stock position, you need to change the scope mount.

Taz77
05-01-2008, 6:23 PM
Whats preventing you from moving the rear ring forward so that you can move the whole scope forward in its rings? Is that some sort of riser that the ring bases are mounted to?

I have a brass deflector that's mounted between the two yhm risers. Without the deflector, the thing just launches brasses right at the guy to the right of me. I guess I'll ditch the deflector and move the ring forward and the guy next to me will just have to dodge the brass :hide:

Taz77
05-01-2008, 6:33 PM
Wow! :eek:

Your rifle looks like what I'm waiting on a barrel and an A2 stock to complete. You brought up something that may be an issue for me as well.

I'll be curious to see how this turns out for you. Thanks for posting the question. :D

That was an older pic. I've made some cosmetic changes to the hand guard and the barrel. This is a more recent pic, but it's just harder to see the rings.
http://i22.photobucket.com/albums/b331/taz77/Firearms/FAR-15002.jpg

Taz77
05-01-2008, 6:48 PM
It's not a Picatinny rail, it's a Weaver-style ring that I was using on another rifle before. http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=142687
I was hoping to not have to spend much on this, so I'll just have to change some things around a little to move the scope forward. I'll see how it works this weekend. I'm hoping the money I don't spend on this will go towards a good trigger for another lower I'm building. I'm trying out the Armalite tactical 2 stage, but I might get another Chip McCormick.

Interesting rings - what kind are they? I've never seen offset rings for a Picatinny rail before.

ar15barrels
05-01-2008, 7:35 PM
Was was thinking that you could get one of those spacers from MGI and cut it down to about 1/2 in or whatever it needs to be.

Or if you had a lathe you could turn your own. Maybe you should put a "big and tall" kit together Randall.;)

I already make such a spacer to correct 9mm uppers which have too much carrier travel and break bolt catches.

http://ar15barrels.com/tech/9mm-spacer.jpg

pc_city
05-01-2008, 8:52 PM
I already make such a spacer to correct 9mm uppers which have too much carrier travel and break bolt catches.

http://ar15barrels.com/tech/9mm-spacer.jpg

Awesome, Randall.