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Discussion Starter · #1 · (Edited)
Picture added on Page 2 & 3


I purchased the first batch of Omega MP5 SD & also RCM SD can at the same time.
The RCM can finally arrived at my dealer today, and I was excited to try it on.
Both looked fantastic but something went wrong...

Unfortunately, the RCM can wouldn't screw into the Omega MP5 SD...
It seems like the thread pitch is incomparable to each other.
I let my dealer try it as well, but the SD can wouldn't screw in.
In addition, the Omega SD's cage is a little bit small w/ RMC can and virtually no room for play.
It ended up scratching my new RCM can when we attempted to screw the can... probably the cocking handle is touching it.
What's the thread pitch of RCM SD can & also Omega SD?

Fairly fracturing indeed... anyone with similar issue w/ current RCM SD can + Omega SD barreled upper?
I would like to hear from you guys before I contact both vendors... I'm sure this will be resolved.
 

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Coolhand:

I believe that the std. HK thread for their SD suppressors is 18 to 1. Have not gotten a suppressor, yet, to try on my Omega MP5SD purchased as part of the first batch.
Will be watching this thread to follow the developments.

Chuck
 

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This is why you should have bought both from TPM......

Ah just kidding. But seriously, I learned my lesson about this kind of stuff when I tried building a Mark White 10/22 pocket rifle from all custom parts. Rail top receiver and bolt from one supplier, custom trigger group from another, (and it wouldn't even fit in a buddy's factory 10/22) I won't name the guilty parties. There might have been a couple pins were actually Ruger. You can probably guess how things turned out.

That's right, all those parts didn't fit together, and are sitting in a box.......
 

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Discussion Starter · #4 ·
My thought exactly... otherwise I wouldn't have brought them.



Coolhand:

I believe that the std. HK thread for their SD suppressors is 18 to 1. Have not gotten a suppressor, yet, to try on my Omega MP5SD purchased as part of the first batch.
Will be watching this thread to follow the developments.

Chuck
 

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The Librarian
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The RCM can is also 18x1mm RH and the issue is with that Omega SD. That is if the charging handle wasn't cut enough to fit the can. Also make sure your charging handle is cocked back before you screw on the Can.
 

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Discussion Starter · #8 ·
The RCM can slides in no problem.
It just sits on the top of barrel and wouldn't screw in.


The RCM can is also 18x1mm RH and the issue is with that Omega SD. That is if the charging handle wasn't cut enough to fit the can. Also make sure your charging handle is cocked back before you screw on the Can.
 

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The Librarian
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The RCM can slides in no problem.
It just sits on the top of barrel and wouldn't screw in.
Was the charging handle forward or back when you tried it? It makes a difference when you screw the can on.
 

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my factory hk mp5sd can fits my omega sd tighter than i would like to see - it does barely fit and screws on perfect.

my serial number is single digit so i have one of the first 10 that were built i guess.

i am really disappointed i missed out of the second batch of omega sd's i would have liked to have gotten a couple more, though i will have the same dilemma as the rest of you finding a good fitting functioning suppressor. i was thinking of buying 3 rcm suppressors just a few weeks ago so i hope maybe they just sent the wrong item to you? i think the rcm can comes with a different cocking tube am i wrong, maybe that's what it for better clearance?
 

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Discussion Starter · #13 ·
I sincerely hope not.... how do you measure the SD can's pitch?
The internal cage of Omega SD is 42mm... just checked with my caliper.



i was thinking of buying 3 rcm suppressors just a few weeks ago so i hope maybe they just sent the wrong item to you?
 

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I sincerely hope not.... how do you measure the SD can's pitch?
The internal cage of Omega SD is 42mm... just checked with my caliper.

my omega is 41.69 mm and the factory sd fits with a scrape on the bottom just a bit.

i don't know how to check the pitch, i posted a bunch of measurements on another thread on various makes of sd's.

i did buy a sd off an auction site and when i got it, the barrel had a lip on it that prevented the sd can from going all the way back onto the barrel. in fact it was a "special weapons" built sd. i wonder if someone might have put the wrong barrel on your sd? that is if the can is correct.
 

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Discussion Starter · #15 ·
Yes, if I didn't round off... the measurement is about 41.79mm on my Omega SD.


my omega is 41.69 mm and the factory sd fits with a scrape on the bottom just a bit.

i don't know how to check the pitch, i posted a bunch of measurements on another thread on various makes of sd's.

i did buy a sd off an auction site and when i got it, the barrel had a lip on it that prevented the sd can from going all the way back onto the barrel. in fact it was a "special weapons" built sd. i wonder if someone might have put the wrong barrel on your sd? that is if the can is correct.
 

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The RCM can is also 18x1mm RH and the issue is with that Omega SD. That is if the charging handle wasn't cut enough to fit the can. Also make sure your charging handle is cocked back before you screw on the Can.
ive found that when inserting my RCM can on my DJ Getz SD host I do need to 1/2 way charge the handle back for easy fitting. Fits fine though.

I just received my Omega SD can. Havent tried it on the host though.

I also have a Powershot SD host which the RCM can fits on fine. We'll soon see if the Omega can does...
 

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Yeah, you pretty much need to pull the charging handle back to screw the can on. If it's in the forward position, it will not screw on.
 

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Discussion Starter · #19 ·
It really didn't matter.
I pulled it back and even removed the cocking handle in order to examine it... it absolutely made no difference.
The RCM can still moves freely even when not cocked back.


Yeah, you pretty much need to pull the charging handle back to screw the can on. If it's in the forward position, it will not screw on.
 

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Discussion Starter · #20 · (Edited)
Well, I went back to my dealer to try it again.
As you can see from the pic, the baffle of RCM SD can is hitting the barrel tip thus not letting it fully seated.
I even removed the cocking handle entirely in order to eliminate the possibility of cocking handle touching the can... made absolutely no difference.
I could feel the RCM can moving, and it just stuck on the tip of Omega SD barrel.
The SD can still moves freely inside the cage with about 2mm clearance.
Now, how to resolve this issue? contact RCM or Omega?













 
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