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RMRcc vs RMR Footprint

This is a discussion on RMRcc vs RMR Footprint within the Guns forums, part of the Gun Forum category; So I am getting ready to send my 1911 off to get cut for the new Trijicon RMRcc. I also have a 1911 longslide from ...


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Old 09-08-2020, 08:29 AM   #1
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RMRcc vs RMR Footprint

So I am getting ready to send my 1911 off to get cut for the new Trijicon RMRcc. I also have a 1911 longslide from Fusion Firearms being delivered today thats cut for an RMR dual illuminated. So by happenstance having them both physically in my hand I notice that they seem to be the same length so I get out the calipers and below pics are what I see in real time. I know what the specs say and all but anyways...Here is what I see.

1. RMRcc
2. RMR Dual Illuminated
3.RMRcc vs RMR Bottom View
4.RMRcc seal plate on the RMR
5.RMRcc vs RMR Top View
6 RMRcc Screw (left) RMR Screw (right)

So it seems the cut length is not a problem but the screw location/overlap is the problem. Very interested in input from bigger brains... Vinny you gettin this? lol
This is a Trijicon RMRcc vs RMR footprint thread. Its not about Holosun, DPP, Shield, where they are made etc. I went to put it in the other thread already started on the subject and guess what... its locked because of all the off topic BS. So if its not about the above RMRcc vs RMR slide cut/footprint please refrain. Thanks, Dave
Attached Images
File Type: jpg RMRcc.jpg (1.67 MB, 6 views)
File Type: jpg RMR.jpg (1.42 MB, 6 views)
File Type: jpg Left RMRcc Right RMR.jpg (1.61 MB, 5 views)
File Type: jpg RMRcc plate on RMR.jpg (148.7 KB, 4 views)
File Type: jpg RMRcc vs RMR.jpg (730.4 KB, 4 views)
File Type: jpg RMRcc Left RMR Right.jpg (100.3 KB, 4 views)
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Old 09-08-2020, 09:25 AM   #2
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Unless you use an adapter plate of some kind that offsets it front/back wise, it won't fit in the normal RMR cut because of the screws and front tabs. And by then you'll have raised it up in height, too.
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Old 09-08-2020, 09:49 AM   #3
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Really interesting. Thanks for posting.

A couple of things right off....
*Restating what you've already mentioned: The hole patterns seem to overlap, so it doesn't appear you could have it milled to accept both optics, even though the Overall Length is identical, unless the cut was made slightly longer to allow one optic all the way forward and the other all the way rear. This would defeat the purpose of a tightly milled optic.
*The G-forces on a reciprocating slide are in the 1,000's, So I wonder if the lack of a tapered countersink on the RMRcc's holes will secure it enough from shifting unless cap screws with a tightly fitted shank are used; and/or some additional locking bosses?? Not sure I would trust it against moving with only the non-tapered cap screws. A precision mill so the optic fits tight will help; and maybe that's enough to secure it from moving side-to-side too? And the seals of course help too. There must be a good reason Trijicon eliminated the tapered countersink??
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Old 09-08-2020, 09:56 AM   #4
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Thanks for posting this, it's good info.
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Old 09-08-2020, 10:40 AM   #5
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Quote:
Originally Posted by MoRivera View Post
Unless you use an adapter plate of some kind that offsets it front/back wise, it won't fit in the normal RMR cut because of the screws and front tabs. And by then you'll have raised it up in height, too.
Yah I got it all figured out now. No substitute for hands/eyes on. There was much speculation before so I wanted to show it live and in color so to speak.
No plates for me. Each of these have there own pistol/project they are going on.
The web specs show the RMRcc as .2 longer than the RMR. Im just not seeing that. Screw holes .2 off more like it.
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Old 09-08-2020, 10:48 AM   #6
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Quote:
Originally Posted by CZSIG-Vinny View Post
Really interesting. Thanks for posting.

A couple of things right off....
*Restating what you've already mentioned: The hole patterns seem to overlap, so it doesn't appear you could have it milled to accept both optics, even though the Overall Length is identical, unless the cut was made slightly longer to allow one optic all the way forward and the other all the way rear. This would defeat the purpose of a tightly milled optic.
*The G-forces on a reciprocating slide are in the 1,000's, So I wonder if the lack of a tapered countersink on the RMRcc's holes will secure it enough from shifting unless cap screws with a tightly fitted shank are used; and/or some additional locking bosses?? Not sure I would trust it against moving with only the non-tapered cap screws. A precision mill so the optic fits tight will help; and maybe that's enough to secure it from moving side-to-side too? And the seals of course help too. There must be a good reason Trijicon eliminated the tapered countersink??

I specifically asked that question when I was on the phone with them and he made it clear... tried tested to hell and back, no locator/lock pins needed
EDIT: I also had 2 machinists tell me that when you mount directly in the cut lock pins are a waste of money and one of them told me he wont even do it. Adaptor plates that raise the optic out of the cut need them.
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Last edited by Heavy Industries; 09-08-2020 at 10:59 AM.
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Old 09-08-2020, 11:16 AM   #7
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Quote:
Originally Posted by CZSIG-Vinny View Post
Really interesting. Thanks for posting.

A couple of things right off....
*Restating what you've already mentioned: The hole patterns seem to overlap, so it doesn't appear you could have it milled to accept both optics, even though the Overall Length is identical, unless the cut was made slightly longer to allow one optic all the way forward and the other all the way rear. This would defeat the purpose of a tightly milled optic.
*The G-forces on a reciprocating slide are in the 1,000's, So I wonder if the lack of a tapered countersink on the RMRcc's holes will secure it enough from shifting unless cap screws with a tightly fitted shank are used; and/or some additional locking bosses?? Not sure I would trust it against moving with only the non-tapered cap screws. A precision mill so the optic fits tight will help; and maybe that's enough to secure it from moving side-to-side too? And the seals of course help too. There must be a good reason Trijicon eliminated the tapered countersink??
Yeah it's going to rely on the milling of a slide securing the fore and aft edges of the housing. My CZ's came milled that way for Vortex Venom and for a Viper on another, whereas other mounts/plates use the registration pins as extra support.

As for the slightly offset screw holes, there are ways to make that work like on a BCM AR15 hand guard, but main screw holes/shafts still need to be independent of the other...these look to be sharing by well more than half. And the non-countersunk screws...my guess is the they needed the extra room inside the base for the battery.

Boy they really made this thing a jealous mistress, didn't they?

Last edited by MoRivera; 09-08-2020 at 11:20 AM.
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Old 09-08-2020, 11:19 AM   #8
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" Boy they really made this thing a jealous mistress, didn't they?"
Yes they did lol
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Old 09-08-2020, 11:21 AM   #9
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Well, like I said when I had some CZ slides milled specifically for Vortex dots...they better be making these things for a while!
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Old 09-08-2020, 01:02 PM   #10
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Old 09-08-2020, 06:40 PM   #11
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Trouble with the English language???
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