Marvel Conversion Kit Unit 1

[CANDERSEN]

I just received my Marvel Conversion Kit, Unit 1. I have put approximately 100 rounds thru it and am much impressed with the accuracy.

I did have numerous failures (failure to go into battery?) - when the trigger is pulled the hammer will fall - however the gun will not fire as the slide is ever so slightly out of battery and it appears that the firing pin is not hitting with sufficient force.

Has anyone had this problem with there Unit 1? Can you trouble shoot it for me.

Thanks Chris

[Tom T Bosee]

Chris, the first thing I would check would be your mainspring. Did it fire flawlessly with the other slide/caliber, and leave a good dimple in the primer? Sometimes a hammer-snap is strong enough with one slide assembly to fire, and not with another.

[CANDERSEN]

I dont think it is the hammer spring. Perhaps it is because it is a new unit. It seems the more I shoot it, the less it malfunctions. There seems to be a wear in period with these units.

Man! is it accurate

Chris

[Tom T Bosee]

Chris, if it keeps working better, keep shooting! No one can manufacture a conversion unit and know that the potential customer has a receiver that matches mil. specs. Break it in, and try different brands of ammo, we don't go broke shooting .22LR! Tom

[Gammon]

Just took delivery on a Marvel #1 Long Slide and I am in love! The Marvel mags didn't fit as they wouldn't lock into place, so I tried some Cieners I had on hand. They worked flawlessly. I have heard online that some Marvel kits work better with Ciener mags. They are available from Brownells. Failure to go into battery is most likely either a tight chamber or a feeding problem (most likely the mag).

[Tom T Bosee]

Just took delivery on a Marvel #1 Long Slide and I am in love! The Marvel mags didn't fit as they wouldn't lock into place, so I tried some Cieners I had on hand. They worked flawlessly. I have heard online that some Marvel kits work better with Ciener mags. They are available from Brownells. Failure to go into battery is most likely either a tight chamber or a feeding problem (most likely the mag).
It's always good to find an accessory from one manufacturer that works in another's conversion; hopefully it will bring .22LR mag prices down!

[Gammon]

I dont think it is the hammer spring. Perhaps it is because it is a new unit. It seems the more I shoot it, the less it malfunctions. There seems to be a wear in period with these units.

Man! is it accurate

Chris

I experienced the same problem with a DPMS 22LR upper for my AR. The problem was failure to completely chamber the round. With the action slightly out of battery, the firing pin would expend its energy chambering the round and not strike the primer with enough force to ignite. In my case the culprit was a rough chamber, once I had polished it the problems ceased. I don't think a rough chamber would be the problem with a Marvel unit as the barrels are match grade. Powder residue in the chamber could be the problem. I would keep the chamber clean and try a few brands of ammo; try to find the cleanest.

[primersinmyshoe]

The trick for me to get my Marvel #1 running smooth was ammo selection. Not just any bargain basement 22 cal ammo will do. You'll have to experiment with some good quality ammo {insert name here} to see what it likes. I use Federal Gold Medal, but of course, your milage may vary.

[Gammon]

The trick for me to get my Marvel #1 running smooth was ammo selection. Not just any bargain basement 22 cal ammo will do. You'll have to experiment with some good quality ammo {insert name here} to see what it likes. I use Federal Gold Medal, but of course, your milage may vary.
That's what I thought until I found that my kit works just fine with bargain basement Blazers ($20.00/1000 at the local gun store). These things are ammunition-sensitive, but cost may not be the best indication of reliability.