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Posted: 6/22/2009 11:17:26 AM EDT
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Ron Allen (Ops Inc) made me a couple new collars for the 16th Model can specifically for barrels that didn't have the M4 cut. I was talking with a guy earlier today who wanted to see the differences in the standard and this new collar so I snapped some pictures and thought I'd share.
The one on the left is the standard mount. It is intended to be installed on an M4-profile barrel (pictured). See the little step cut ~1/4" past the threads? That is the "lip" onto which the collar on the left engages and then the collar is kept in place with a set screw. The collar on the right just slips over the barrel and indexes off the shoulder behind the threads. Thus, with the collar on the right you don't need to have the M4 cut; you just need a standard .750" barrel diameter. .jpg)
Standard collar on the top and the new collar on the bottom: .jpg)
This addresses the issue of barrels maybe not having the proper M4 cut for the standard 16th Model collar. Just slip the new collar over the barrel, install the provided crush washer and then torque the muzzle brake into place. .jpg)
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With the thread protector in place: .jpg)
These are the two rifles on which I'm using my 16th Model can. I've played around with that new collar for awhile now and so far, so good. .jpg)
Just figured some 16th Model users might find this interesting. Mark |
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Quoted:
How is the POI shift with that device compared to the standard collar? I finally got around to trying both mounts for accuracy on the same rifle and found no difference. POI was very minimal, at maybe .75" at the 4-o'clock position. I've found that is very typical and consistent with Ops Inc cans. Ammo was Black Hills and Prvi in both 55-grain and 75-grain. Rifle has a 16" Bushy barrel. Mark |
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