Ria a2 10mm conversion

[Red9]

Always wanted a double stack 1911/10 mm. Roster makes that a hard one. Bought a ria a2 45acp. Then purchased a .40 tactical slide. Next needed a custom Jarvis barrel non ramped barrel.
Not the cheapest route. But nonetheless now have a double stack 1911. Such a soft shooter vs my Glock.
Slide was 400. Barrel 250. Still cheaper than a delta.

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[dilbert40]

Nice. Who makes double stack 10mm magazines for this build?

[walmart_ar15]

Should had gone with all RIA parts, slide, reverse plug, and 10mm barrel. Would have shaved at least $300 from the build. Now just need that beaver tail cut. Regardless, compared to what factory wide body 10mm out there, converting RIA A2 is still cost effective.

I done A2's in 3.5", 5", and 6". In 9mm, 40, 10mm, and 45.

RIA A2 takes Para magazine.

[Red9]

Nice. Who makes double stack 10mm magazines for this build?

Ria. Mags are silly expensive.

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[Red9]

Should had gone with all RIA parts, slide, reverse plug, and 10mm barrel. Would have shaved at least $300 from the build. Now just need that beaver tail cut. Regardless, compared to what factory wide body 10mm out there, converting RIA A2 is still cost effective.

I done A2's in 3.5", 5", and 6". In 9mm, 40, 10mm, and 45.

RIA A2 takes Para magazine.

Ria didn't have any non ramped barrels[emoji3525]. Slide is a ria tact 40 slide. However it's a ramped slide.
The Jarvis barrel is definitely worth every penny.

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[Sailormilan2]

Use the Stainless Steel drop in 10mm barrels from Numrich. Very well made, and almost as perfect fit in my slides. Bore slugs very close to spec. .4005? is spec, and these come in around.4006/7?. I have several.

5? barrel:

https://www.gunpartscorp.com/products/1050550a

4 1/4? barrel:

https://www.gunpartscorp.com/products/983150

[Red9]

Use the Stainless Steel drop in 10mm barrels from Numrich. Very well made, and almost as perfect fit in my slides. Bore slugs very close to spec. .4005? is spec, and these come in around.4006/7?. I have several.



5? barrel:

https://www.gunpartscorp.com/products/1050550a

4 1/4? barrel:

https://www.gunpartscorp.com/products/983150

Dang it lol. Will that fit the 45acp? Breechface ok 45 vs 10?
I had to replace my ejector on the lower as well. Did you need the .40 ejector too?

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[Sailormilan2]

10/40 uses the 38 Super ejector. 9mm is similar in shape, but a little longer. Those ejectors will not work with the 45acp Government (5?) slide. The 45acp Government ejector will not work with the 9mm/38Super/10mm slides.
ALL ?Commander? style slides use 38Super ejector.

I did fail to mention that those barrels from Numrich will need to be finish reamed. About a 5 min job.

[walmart_ar15]

Ria didn't have any non ramped barrels[emoji3525]. Slide is a ria tact 40 slide. However it's a ramped slide.
The Jarvis barrel is definitely worth every penny.

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What does a ramped slide look like? Honestly, never seem one.

Too bad RIA stop making non-ramped 10mm barrels.

A 45 slide with a 10mm barrel and really bent extractor can work, just not very reliable.

[Red9]

Lol. Got me. Ramped.barrel not slide[emoji849].
I swapped the ejector to the .40 vs the 45. It does run well. Very mild vs the Glock shooting hot loads. 180 gr over 10.7 gr of blue dot.

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[ar15barrels]

Always wanted a double stack 1911/10 mm.
Roster makes that a hard one.
Bought a ria a2 45acp.
Then purchased a .40 tactical slide.
Next needed a custom Jarvis barrel non ramped barrel.

You really should go with a fully ramped barrel for high pressure cartridges like 10mm as it supports the case so much better.
When you go with a non-ramped barrel, you really should be limiting your loads to 45acp pressures as are normally used with non-ramped barrels.

There's a reason that all the high pressure chamberings use ramped barrels.
Safety.

[Sailormilan2]

I will respectfully disagree with AR15 Barrels regarding the need for a ramped barrel for the 10mm. What the 10mm needs is a properly chambered barrel, and decent brass.
As I previously posted, I have used several, 5 actually(3 Full Sized 5", and 2 Commander sized), SS barrels from Numrich. I've used the full house Underwood ammo in all of them, without issue. Not even a "smile"(start of a bulge). I've fired quite a few of the recommended accuracy loads of 10.4 gr Blue Dot and a 180 gr bullet. Again, without issue, or "smile". That's not a 40S&W level load. I'm quite sure I can go hotter, but I'm choosing not to.
Now, have I had a case failure? Yes. Due to my error in reloading, and possibly a brass issue. Federal brass doesn't have a good reputation in some quarters.
If you just have to shoot absolutely nuclear powered loads, you are probably better off with a ramped barrel. But, for most, an unramped barrel is just fine.

[walmart_ar15]

In context of high-pressure round in ramp or un-ramp barrels. I have shot very hot 400 Corbon loads in a modified 1911 pushing 180 grn above 1700fps. using non-ramped barrel. To the extent that after the 3rd reload, the case will separate at mid-section, not at the rim. This is with 45+P Starline formed brass. No "smiley" near the rim, but definitely pressure sign at the primer. This indicates that non-ramped barrel has sufficient chamber support. Believe someone on the web actually did a side-by-side comparison, showing a factory non-ramped barrel has just as much chamber support as a factory ramped barrel.

The problem with non-ramped barrels chamber support is that when the barrel is not fitted correctly to the gun and "Smith" trying to make it work by "polishing" the throat of the barrel and removed too much material to form a ramp. Yup, been there and done that while I was learning about barrel fitting. It is why so important that the gap between the barrel and the edge of the ramp on the frame needs to be at least 1/32". That's how JMB designed it, and how it should and will work. There are a lot of info in the web if one wants to know why the gap exist. Too much to type to explain it

From an OEM manufacturer's perspective, if the industry lore is that non-ramp barrel no good, not safe for 10mm, which barrel do you think they will produce and sell?

[Experimentalist]

Kart makes a 10 mm non-ramped barrel, if you wish to do some fitting.

Seems people have good success with them: https://www.1911forum.com/threads/ps...t-10mm.781330/

For what it's worth the Colt Delta Elite does not have a ramped barrel, and folks seem to have pretty good success with them over the decades (early cracked frames not withstanding).

I'm not arguing with AR15Barrels (Randal*), he is correct that the ramped barrel is overall the best solution. There's often a "but..." and the Kart barrel seems to be a good option.

I've a Kart non-ramped barrel in 10mm, I'll let you know how it goes if & when I ever get the pistol done (fitting the beavertail grip safety to the gun is *such* a tedious process).




*AR15Barrels has forgotten more about firearms than most of us on this forum will ever know.

[ar15barrels]

I don't mind people disagreeing with me.
I come from the competition world where we run nuclear loads to make major in cartridge that we probably should not be using to make major.
Nobody serious about competition runs an unramped barrel in a high pressure chambered competition 1911/2011.
10mm brass probably has a thicker case head than 45 does to make it a little safer in unramped barrels.
As long as you are not getting smiley's, you are probably fine.