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M1NM
09-11-2013, 9:21 PM
I've seen shots fron Camp Perry where they are using bolt action uppers. Is it a different upper or just regular with different parts?

Haplo
09-11-2013, 9:30 PM
Different upper, like they use in England (restricted to bolt action). I imagine it's something like a side-charging upper without a gas tube. It's an abomination.

rromeo
09-11-2013, 9:32 PM
You can use the same upper with the gas tube removed and the ports blocked.

dyson
09-11-2013, 9:34 PM
i'm guessing, but looks like a regular set up with no gas tube and a side charging handle.

http://www.youtube.com/watch?v=QTHECgM1APQ

Merc1138
09-11-2013, 9:47 PM
Probably saw something like this with a single shot sled:
http://www.whiteoakarmament.com/xcart/product.php?productid=17553&cat=259&page=1

Or something similar to this:
http://mcmillanusa.com/mcmillan-rifles-alias.php

ar15barrels
09-12-2013, 1:00 AM
I've seen shots fron Camp Perry where they are using bolt action uppers. Is it a different upper or just regular with different parts?

Are you SURE it was an AR and not a tube gun?
Tube guns are common in the match rifle category and they look like an AR from more than 20ft away...

http://i280.photobucket.com/albums/kk188/littlefragglesphotos/DSC00254.jpg

bloodhawke83
09-12-2013, 1:18 AM
Was it Mossberg doing a module bolt gun that had ar-15 pistol grip and butt stock?

Sent from my DROID RAZR using Tapatalk 4

Chaos47
09-12-2013, 1:44 AM
If only we had a sub-forum called Centerfire Rifles - Manually Operated (http://www.calguns.net/calgunforum/forumdisplay.php?f=327) where we could talk about things like this.. oh wait.

Edit: I see that it has been moved to the proper forum.

milotrain
09-12-2013, 1:37 PM
At this point I see more tube guns on the line (like randall showed) than I see ar match rifles (spaceguns).

http://www.jocabphoto.com/img/s9/v2/p578213896-3.jpg
^Spacegun

photo stolen from ocabj (who I know has taken a photo of his R5 tubegun in offhand but I can't find it.)

postal
09-12-2013, 6:02 PM
Yeah... tube guns are getting more and more common... at a glance they look like an AR, but they aint cheap.....

I dont recall actual history, but as I recall it was David Tubb with the Tubb 2000 that got people into 'tube guns'.

phish
09-12-2013, 7:06 PM
Tube guns took off in popularity to offer a cheaper alternative to the ever increasing price of the Tubb 2k. The main difference between a tube gun and the T2k (now T5k lol) is the tube gun requires a separate barreled action. They can readily take 700 footprint actions, and the sky's the limit in terms of what you want it for. You can shoot a tac match on Saturday, f-class match on Sunday, then a NRA Highpower match the following Saturday without much fuss.

McMillan has removed the Tubb name and is now called the Alias. It's an interesting design and is made of 17-4PH stainless, which partly explains its princely sum.

Wrangler John
09-12-2013, 8:16 PM
I built a bolt action AR from a Colt M-4 H-Bar Elite lower. Added the following:

http://www.fulton-armory.com/upperreceiverflattopwsidecockingslot.aspx

Along with a F-A side cocking bolt carrier which are not shown in stock now. Then added a custom manufactured 24" heavy contour Hart barrel without a gas port. I did not want a blocked gas port as the port still accumulates fouling and can be seen as "easily convertible" to self-loading. Hart Barrels was the only one that found manufacturing a portless barrel no problem. I also had mine chambered for .204 Ruger, for varmint hunting. I installed a JP Enterprises EZ Trigger, and tension pin http://www.sinclairintl.com/gun-parts-tools-accessories/firearm-parts/ar-15-parts/ar-15-replacement-parts/jp-tension-pin-ar-15-prod35481.aspx I also shimmed the front pin with .0045" shims to remove the lateral slop. These were made from revolver cylinder end-shake shims honed flat between carborundum stones. Thus far several loads have shown potential:

The load below uses Hornady's .204" 24 gn NXT lead free bullet. This is a ten shot group at 100 yards, velocity around 3,900 fps. I blew one shot and dropped another out of the group. The diamond is .5" on a side. Good enough for varmint hunting. Loads using the 26 grain Barnes Varmint Grenade also show promise. AAC LT-32 Powder is amazing so far. The group was fired from a Harris Bipod and rear bag.

http://i274.photobucket.com/albums/jj241/Wrangler-John/M4Bolt204Ruger_zpsa8a3d9e9.jpg (http://s274.photobucket.com/user/Wrangler-John/media/M4Bolt204Ruger_zpsa8a3d9e9.jpg.html)

I also tried a Criterion AR-15 barrel with a plugged gas block in .223/5.56 but accuracy, while good, was not up to my standard. That gas port may have been the problem.

Two things about the bolt action, brass drops out completely cool, you can pick it up without being burned. Fired brass is also free of fouling except for a ring about halfway down the neck - just what is wanted. Which also means that the action interior is clean and pristine.

DPMS at one time listed a side cocking upper receiver without the charging handle slot, but I don't see it listed now. The standard charging handle is redundant in a bolt action.

I have an idea to convert a lower to prevent anything but a bolt action upper from being fitted, should the political madness continue. More to follow at a later date.

M1NM
09-16-2013, 9:35 PM
Yep tube gun - thinking on converting my varmint AR to a single shot gun. It'll have a magazine but will need to be hand cycled each time. Now do I machine a bolt handle or just use the stock charging handle? I'll leave the gas system intact but block it with a set screw and loctite.

Merc1138
09-16-2013, 10:08 PM
Yep tube gun - thinking on converting my varmint AR to a single shot gun. It'll have a magazine but will need to be hand cycled each time. Now do I machine a bolt handle or just use the stock charging handle? I'll leave the gas system intact but block it with a set screw and loctite.

Yes, you can use the stock CH but it's not exactly ergonomic for manually cycling it every shot.

BlairB
09-17-2013, 12:48 AM
How about one of these? Just pick your caliber- 50 BMG, 416 Barrett, 338 Lapua , 408 CheyTac

http://a248.e.akamai.net/origin-cdn.volusion.com/nkqmn.ryfrw/v/vspfiles/photos/categories/1814.jpg?1331960382

milotrain
09-17-2013, 11:54 AM
Yep tube gun - thinking on converting my varmint AR to a single shot gun. It'll have a magazine but will need to be hand cycled each time. Now do I machine a bolt handle or just use the stock charging handle? I'll leave the gas system intact but block it with a set screw and loctite.

Side charging handle
http://www.keystoneaccuracy.com/images/700_billet_receiver_assy_RH.jpg

This lets you run a cheek riser, which you cannot do if you need to run the rear charging handle (unless you move the riser out of the way, charge and move it back). Apparently the brits do this to get legal ARs.

http://www.youtube.com/watch?v=QTHECgM1APQ

vincewarde
09-20-2013, 1:08 PM
Yep tube gun - thinking on converting my varmint AR to a single shot gun. It'll have a magazine but will need to be hand cycled each time. Now do I machine a bolt handle or just use the stock charging handle? I'll leave the gas system intact but block it with a set screw and loctite.

If you are simply looking for an AB374 work around, simply epoxying a 10 round magazine into the well would do the trick and still give you single shot capability.