Just right carbine conversion

[Henri311]

Hey guys I've been planning to do this for sometime and researching quite a bit I would like to convert my .40 JRC to 10mm by reaming the barrel, changing the mag well, and replacing the buffer with a custom one made from tungsten, I know it's a long shot but if it works I think it will be awesome

[The_Shadow]

http://www.justrightcarbines.com/FAQs.html

Q:  When will you offer the JR Carbine in 10mm?    The JR Carbine is a direct-blowback design. The bolt is entirely inertial and does not lock when in battery, and the barrel breech does not depress upon firing, so there is no mechanical action to absorb some of the recoil energy as there is in the 1911 or Glock, for example.When the gun is fired the bolt's mass is not enough by itself to sufficiently slow the bolt's recoil, even when using the standard AR-15 aluminum buffer with its own internal sliding weights. In order to adequately slow the JR Carbine's bolt down the bolt in the JR Carbine it has a solid steel buffer to augment the mass of the bolt. Our buffer is significantly heavier than the standard AR-15 aluminum buffer, and is sufficient for the energies developed by the 9mm, 40S&W. and 45ACP. Unfortunately, the full power 10mm generates too much energy (37,500 psi) to accommodate through increased buffer mass within the limited confines of the buffer tube and still permit sufficient fore-and-aft bolt travel for the gun to function. Using a significantly denser material for the buffer - like tungsten, for example - might accommodate the higher power of the 10mm, but it would be cost prohibitive. Using reduced power 10mm cartridges might work, but then the performance would be much like the 40S&W and the advantage of the 10mm would be lost. For these reasons we do not plan to offer the JR Carbine in 10mm (or other high power cartridges such as .357 Sig, .40 Super, or .460 Rowland, for example).

[Henri311]

The tungsten buffer isn't "cost prohibitive" if the consumer is willing to pay for it! I have a gunsmith willing to make me one and he owes me a favor

[gandog56]

I'm thinking Mechtech makes carbines to fit using your 1911 or Glock 10mm pistols already, no conversion needed.

http://www.mechtechsys.com/

[ShadeTreeVTX]

Your Right Gandog and at probably 1/4 the cost it you have the right lower.

[Henri311]

Alright alright I concede this is not the best idea. It might have been cool but I've come to the realization 10mm is a great handgun round

[ShadeTreeVTX]

Check out Mech-Tech .com or google it.
And see what we are talking about.

[gandog56]

One of these days I'm thinking of seeing if a Mech Tech will fit with my Dan Wesson Razorback RZ-10. I'm sure it won't with my Fusion Firearms 10mm as it's a long slide.


On the other hand, that could also sway me into getting an RIA 10mm, too, if it wouldn't fit the Wesson.

[sqlbullet]

I don't think the MechTech uses the slide.  And the pictures I have seen of your fusion, it appears to have a standard length dust cover.  I don't know why it wouldn't work as well as any other 1911 lower.  You will need to frame plug to fill in where the block is cut for a ramped barrel.

[gandog56]

Yeah, but the frame of my long slide is also longer. Remember they are cut for a regular 1911 size.

[awp101]

Reviving the dead thread alert! 

For these reasons we do not plan to offer the JR Carbine in 10mm (or other high power cartridges such as .357 Sig, .40 Super, or .460 Rowland, for example).

I don't know if they went to a heavier bolt, buffer or both, but it might be worth asking about the 10mm again because .357SIG is listed as an available caliber now: http://www.justrightcarbines.com/JR_Carbine_Products.php

[gandog56]

Well.....if you're going to revive it, I actually followed through and DID it!

[awp101]

Cool!  It fit the longer frame without any issues?

[gandog56]

Cool!  It fit the longer frame without any issues?

Yeah, slides right in no problem. The problem is I am limited in the rounds per mag. I have like 2 that take 10 rounds, but those are my biggest. I have seen much larger capacity third party mags for Glocks, but not really any for 10mm 1911's. I see some for .45's and I am kind of wondering if they would work.

[Pachary]

I was at the NRA convention, and asked an engineer with JRC about 10mm.

He told me it is in development.