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Discussion Starter #1
Gents- can an owner of a properly registered Coharie SD SBR convert the gun to an MP5-Navy style gun by either removing the can or swapping out the barrel/ can with an HK MP5 barrel? I hope I did not butcher the terms of art to badly and I appreciate in advance any information. Thank you-

Andrew
 

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The SBR is an SBR regardless of the barrel installed. The CAN has it own tax stamp so it is independent of the gun. SO... Yes you can sell your SD CAN, have the barrel replaced, a new cocking tube support installed and the shroud removed... It seems its a pricy alteration when you could just buy a barreled upper or have Jeff (Ghillie) build you one for about the same with an RCM barrel.

Good luck,

J
 

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Sure... but why would you want to do that? The SD is supposed to be more of a CDI gun than the Navy gripped MP5-type. I say type because it never was an MP5 and never will be.

I would think that it would be cheaper to sell the SD and just buy what you want. You'll end up with spare change in the pocket, too...
 

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Discussion Starter #4
Thank you for the informative replies. To clarify further, I did not mean to imply that the change from SD configuration to Navy barrel would be permanent. I know it may seem to be a no-brainer for more informed enthusiasts, but I naively thought one could simply "swap barrels (or can for barrel)" in a matter of minutes at the range for a different firing experience. I understand you to say "no, much more complicated project than that" and I appreciate the info.

Andrew
 

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I understand you to say "no, much more complicated project than that" and I appreciate the info.

Andrew
Yeah... kinda. We're talking about grinding down welds, pressing the barrel retention pin out with a big-assed press, pressing the barrel out with the same big assed press, pressing in the new barrel with... well... you kinda get the idea. It's not like you can just pop a pin out and replace the barrel like an AR upper.
 

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Actually, Ralph at RDTS did make a sleeve. Remove the SD can from the SD. Then slide the sleeve over the barrel and thread it onto the can threads at the base of the SD barrel. The sleeve covers the ports in the barrel. I believe he would thread the muzzle end of the sleeve so a flash hider could be installed. With the extra pressure of the sleeve covering the ports in the barrel, a standard locking piece needs to be used in the bolt group. That would give double duty with the gun.

Stay tuned, Rim Country will be doing a run of SD suppressors. Mike has inspected my CA89 SD can and says it is an exact copy of the cans they built for Todd, only the RCM cans are made from aluminum. It is my understanding that an "upgrade" will be possible for the Coharie Arms SD cans. With aluminum RCM internals replacing the stainless steel CA internals, it should reduce the weight of the CA SD can by around 1.5 lbs. I might keep the first baffle SS to use as a blast baffle. But reducing the weight by better than a pound sounds real good to me. Good luck with your "duel use" SBR project.

Scott
 

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Discussion Starter #7
Actually, Ralph at RDTS did make a sleeve. Remove the SD can from the SD. Then slide the sleeve over the barrel and thread it onto the can threads at the base of the SD barrel. The sleeve covers the ports in the barrel. I believe he would thread the muzzle end of the sleeve so a flash hider could be installed. With the extra pressure of the sleeve covering the ports in the barrel, a standard locking piece needs to be used in the bolt group. That would give double duty with the gun.

Stay tuned, Rim Country will be doing a run of SD suppressors. Mike has inspected my CA89 SD can and says it is an exact copy of the cans they built for Todd, only the RCM cans are made from aluminum. It is my understanding that an "upgrade" will be possible for the Coharie Arms SD cans. With aluminum RCM internals replacing the stainless steel CA internals, it should reduce the weight of the CA SD can by around 1.5 lbs. I might keep the first baffle SS to use as a blast baffle. But reducing the weight by better than a pound sounds real good to me. Good luck with your "duel use" SBR project.

Scott
Thank you Scott. I actually have headed in the proverbial "different" direction- MP5 Navy build by Chop. It's a waiting game for me now :)
 
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