Finally ready to shoot my new .45 1911 and .22LR conversion

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rpenmanparker

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I am writing this in advance to kill some time before I am ready to go to the indoor range today to try out my new inexpensive ATI Commander size .45 1911 and the used Marvel Unit 1 .22LR conversion slide for which I bought the ATI in the first place. This has been a huge PITA all through the process, but hopefully, it is good times and clear sailing ahead.

The 1911 was delayed two weeks coming to Houston from Smokey Mountain Guns and Ammo in Tennessee (not their fault at all) by a total screw up by the USPS. It just sat for most of that time in a Dallas postal distribution center without moving and unreachable by any method to get it going again. I guess I should be thankful that all ended well.

While I was waiting for the 1911, the Marvel conversion (off GunBroker.com) arrived. I had decided I would use a couple of spare red dot sights on the 1911 and Marvel slides so I started with the Marvel. I decided to use my spare Busnell TRS-25 tubular red dot optic on the .22LR slide so a dovetail to rail conversion plate was required. I found some at CZ-USA. After getting bad information from Frerking Custom Works (the new owner of the Marvel conversion line) and ordering a rail-type mounting plate for a BoMar dovetail, I had to send it back. Of course the required Novak version was out-of-stock, so I had to go looking elsewhere. I found what I needed at Sight-Mount.com for twice the price of the CZ-USA unit, but the owner, Jim Drago is a prince. Loads of help. Just ask. And he will make just about whatever you need if you don't see it in his product list. Then the dovetail insert part of the fitting was a bit small. Fortunately the mounting screws for the rail plate pull the dovetail insert up tight in the dovetail and make everything secure. Then the TRS-25 mated to it beautifully. So far, so good.

When the 1911 arrived, I removed the mil-spec dovetail , but couldn't install the mounting plate dovetail due to it being too big. Keith the gunsmith at Athena Gun Club took care of that for me, and how. The inexpensive Sightmark red dot looks great on the .45 slide, like the mount was cut into the slide almost.

So much for preliminaries. I finally went to the range today to try out both slides and zero the optics. I am so impressed with the ATI 1911. $329 delivered to the FFL. And does it shoot! Beautiful trigger especially after about 100 cycles of pushing the hammer forward while pulling the trigger. Tight, but smooth. A little takeup to start and then snap like breaking glass. So sweet. Tight groups. Nary a malfunction with the OEM and two Wilson Combat magazines even with JHP ammo. I am so pleased with it.

Unfortunately the conversion slide is a different story. It just doesn't work on that lower. I have tried three magazines and none of them work. It doesn't strip and chamber rounds. When you manage to get a round in the chamber, it doesn't eject the empty. Shoots fine, but so what. I am discussing a return for credit with the seller. He seems cooperative. I'm willing to pay the return shipping and leave him a few bucks for his trouble. Not really his fault. I believe him when he says the conversion worked fine on his 1911. I just don't want to be on the hook for a paperweight.

Assuming I return the conversion and come out okay, I have to decide what to do next. I could buy a Nelson, also a Marvel design, but I think more up to date and more reliable. Or maybe I will look around at what else is available.

Here is what's funny. I really didn't want the .45 1911. I just bought it to mount the conversion slide on. But now I am so glad I did. I am just tickled with it. What a super value! Strange how that worked out. Even if I have to go back to square one on the conversion, I am still ahead of the game.

I almost forgot. While I was waiting for the 1911 to arrive, I found some reasonably priced G10 grips for it to replace the OEM mahogany ones. Big improvement. Also Keith has an ambi safety on order for me and will install it when it arrives. Good thing the gun started out cheap. That won't last for long.
 
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Sounds like a magazine issue with the conversion.
Yes, I agree. But I would be better off addressing that kind of issue under warranty. The conversion I picked up is too far removed from its origins for a magazine scouting project to be successful. Besides Nelson I’m looking hard at Advantage and GSG.
 
I have a Nelson on order. Talking to Larry Nelson on the phone before ordering was very helpful, particularly regarding my chosen lower and magazines. My brother has an older Marvel, it works great on one of his frames but not so much on another. Mags are the issue. He also has an AA conversion for his G19. It is pretty reliable but ammo picky.
 
I have a Nelson on order. Talking to Larry Nelson on the phone before ordering was very helpful, particularly regarding my chosen lower and magazines. My brother has an older Marvel, it works great on one of his frames but not so much on another. Mags are the issue. He also has an AA conversion for his G19. It is pretty reliable but ammo picky.
.22 LR ammo is a real PITA. I have about 2000 rounds of Aguila left that don’t work well in any of my .22 LR pistols.
 
Nelson Cutom is the very best 1911/.22 unit out there.
Yes, but there is never any guarantee of smooth functionality with any conversion unit. I can’t invest that much money into this project and be disappointed again. The fixed barrel type is the better bet, but very pricey. I will either sell or return the Marvel unit, not sure yet. I just bought a GSG 1911 .22 instead of continuing down the .45 to .22 conversion path. We shall see how that goes.
 
Meanwhile I am now a proud .45ACP owner. I would have never bought one for any other reason. But I did for this project, and I love it. That is so funny.
 
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Rimfire ammo has a tough time overcoming the standard GI 23 pound mainspring as it is, plus the added weight of the sight, I'm not surprised it failed. Only Stingers would cycle my conversion with the 23 pound spring, and that was with open sights.
I had to go to a 20 pound mainspring in my 1911 with conversion to get it to cycle HV ammo. Never did get it to cycle standard velocity ammo.
You just have too much weight and too much mainspring. You need to reduce one or both to get it to cycle.
Mainspring are a PITA to change on a 1911. So you need to have a dedicated frame with light mainspring or build a 2nd mainspring housing assembly with a light spring.
Or go back to open sights and break it in with the hottest ammo you can find.
 
BTW, the conversion in your pictures is the Marvel Unit 2, not the more expensive Unit 1. The Unit 1 (like the Nelson conversion) has a stationary sight plane and functions fine with red dots because they don't reciprocate when fired. The Unit 2 is like my Kimber conversion where the whole slide reciprocates when fired. Not really designed for the added weight of a red dot sight.
 
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BTW, the conversion in your pictures is the Marvel Unit 2, not the more expensive Unit 1. The Unit 1 (like the Nelson conversion) has a stationary sight plane and functions fine with red dots because they don't reciprocate when fired. The Unit 2 is like my Kimber conversion where the whole slide reciprocates when fired. Not really designed for the added weight of a red dot sight.
Oh, the weight. I see now. I couldn’t figure out what it had to do with the sight. I have red dots on all my pistols. Never realized it would be a problem with the conversions.
 
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No matter which conversion you use, chances are you are going to have to lighten up that mainspring. The first time I changed it in my buddy's gun, the mainspring cap went flying, never to be seen again. It's tricky, helps to have a vice or better yet a gunsmith.
I would recommend 19 or 20 pounds for a dedicated rimfire frame or 21 pounds for 45/rimfire combo gun.
If you lighten up the mainspring, it just might function the way you have it set up now. Plus they usually need a break in period.
 
No matter which conversion you use, chances are you are going to have to lighten up that mainspring. The first time I changed it in my buddy's gun, the mainspring cap went flying, never to be seen again. It's tricky, helps to have a vice or better yet a gunsmith.
I would recommend 19 or 20 pounds for a dedicated rimfire frame or 21 pounds for 45/rimfire combo gun.
If you lighten up the mainspring, it just might function the way you have it set up now. Plus they usually need a break in period.
Thanks. Good to know.
 
BTW, the conversion in your pictures is the Marvel Unit 2, not the more expensive Unit 1. The Unit 1 (like the Nelson conversion) has a stationary sight plane and functions fine with red dots because they don't reciprocate when fired. The Unit 2 is like my Kimber conversion where the whole slide reciprocates when fired. Not really designed for the added weight of a red dot sight.
What you say is correct. I should point out that like Marvel, Nelson has two models, the Target with the non-reciprocating barrel, and also the type with the reciprocating slide/barrel.
 
Well these posts have been very helpful. I thought the Aguila ammo I was using was called "Super Extra" because it was very high velocity. But when I looked at the box, I saw it was very slow standard velocity. Damn. That was likely one cause of the Marvel unit failure along with the heavy Burris red dot on the slide. I went out to Academy and bought some regular high velocity Remington Golden (40 gr, 1255 fps) and some hyper velocity Winchester (40 gr, 1435 fps) to see how those do in the Marvel. When I test that, I will be sure to use the OEM iron sights. But I have been having frequent cycling failures with my Browning 1911-22 also and want to see if the higher velocity ammo fixes that. Obviously my red dots aren't helping, but I want to see if faster ammo allows me to use them, at least the open reflex type which are lighter. I will test the Browning that way. Thanks for the information, folks.
 
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