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-   -   Removing collar from the Mann (http://forums.thecmp.org/showthread.php?t=87647)

Cowboysnavy 10-13-2012 01:12 AM

Removing collar from the Mann
 
I see that it can be done how hard is it to do?
Do you have to remove the barrel to do so or will a couple of smacks from a dead blow hammer do the job?
Thanks in advance

VMFn542bob 10-13-2012 03:46 PM

Have you read WRMorrison's thread ?
http://forums.thecmp.org/showthread.php?t=78658
Walter "Rich" Morrison is the only person I know who has removed a MANN barrel and he can certainly help you. I can tell you that you need a means of holding the barrel and another means of rotating the reciever, without damaging either one. I would also suggest that before you remove the barrel you place a witness mark on the barrel, collar and receiver so that it can be assembled again with the same head space. You can eliminate the collar and replace it with a spacing washer of the same thickness as the base of the collar and then return the barrel to the same head space.
You can send Rich a PM or e-mail by clicking on his screen name in his thread.
Hope this helps.

Cowboysnavy 10-14-2012 01:25 PM

Ok I see now you have to remove the barrel and that would mess up that perfect headspace I'm looking for so I will just bed it in a stock from the collar back thanks

graywulf4570 01-16-2013 02:09 PM

Does the .308 Mann Accuracy Device currently offered
having the stainless barrel also have removable bushings or is it a solid piece?

kraigwy 01-17-2013 08:00 AM

My Mann is in 5.56 on a Remington Action. I've studied it every way from Sunday and still believe its part of the barrel and not a collar. I don't think it will come off short of chucking it in a lathe and cutting it off.

graywulf4570 01-17-2013 08:56 AM

Interesting; perhaps the 5.56 barreled Remington actions were machined as a solid piece in an effort to reduce the cost of production for testing the 5.56...while the .308 (7.62x51) have the bushing/collar installed as a product of that particular evaluation contract. Either way, I recently inspected a .308 conversion at a local gun show and it was a .308 without the bushing/collar.

VMFn542bob 01-23-2013 12:21 AM

Quote:

Originally Posted by graywulf4570 (Post 746321)
Does the .308 Mann Accuracy Device currently offered
having the stainless barrel also have removable bushings or is it a solid piece?

I suspect they all do have removavle collars but also suspect all do not have stainless barrels. Both of my 7.62 NATO MANN rifles had stainless Walker barrels and both MANNs had a parkerized removable collar on a Remington receiver. I have no idea what manufaturer barrels and receivers that remaining MANN rifles have, but I am pretty sure they will have removable collars. You can contact the CMP armorer and ask that question, and also probably determine what manufacturer barrels and receivers are available. I also have been told that there are more MANN rifles still crated and they probably won't be opened until the current supply dwindles. And sadly, the CMP won't even know what is in those crates they have until they do open them.

ODCMP 01-23-2013 08:55 AM

Here is a picture that I saved that shows the collar on the barrel with the barrel removed. This was a 7.62 device.

The collar will slide off freely once the barrel is removed. There is a smaller shoulder on the barrel, then a step to allow for the collar. If you look closely at the shoulder in the picture you can see the line between the barrel shoulder and the collar.

Dave

http://i250.photobucket.com/albums/g...1.jpg~original

graywulf4570 01-23-2013 09:17 AM

outstanding photograph; it is interesting that the collar can be slipped off if necessary.

very nice.

VMFn542bob 01-24-2013 10:20 AM

Quote:

Originally Posted by graywulf4570 (Post 752150)
outstanding photograph; it is interesting that the collar can be slipped off if necessary.

very nice.

You might be interested in reading this old thread.
http://forums.thecmp.org/showthread.php?t=78658


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