Need part fabricated for Mini-14/AC-556

GeorgeSSR · Sep 21, 2017

Any recommendations for people/businesses for getting a small part fabricated? I need to get a gas block bushing made with no gas hole that would essentially turn a Ruger into a straight pull rifle.

In case you're curious I have a Ceiner conversion kit (straight blowback) in a stock that requires complete disassembly to convert the thing between 22LR and .223, and since the cleaning method to blow out the dirt from 22LR is to dump a mag of .223 I might as well modify this thing so it doesn't need to be disassembled every 200 rounds. Putting a plug in there is more convenient as there's no extra work involved in conversion, and if I don't convert it too often I don't gunk/wear out the parts from frequent disassembly. Currently I have the gas tube turned around and bushing removed so the only thing I have to clean is the gas port on the barrel and the space where the bushing sits (where it can easily be cleaned by a drill bit spun by fingers only).

John from MD · Sep 21, 2017

Just measure the gas bushing and cut a drill bit or bolt to the same size using a dremel cut off wheel. It is really easy to do and will save you lots of money.

GeorgeSSR · Sep 21, 2017

John from MD said:
Just measure the gas bushing and cut a drill bit or bolt to the same size using a dremel cut off wheel. It is really easy to do and will save you lots of money.

Picked up a diamond wheel to give this a shot. Wish me luck!

John from MD · Sep 21, 2017

piece of cake. I would spread some anti seize on it so it comes out easier if you are getting lots of lead and lube from the .22's. Did you buy your kit from Jon Ciener? I had one of his first Attichson (SP?) .22 kits that I could never get to work in the ac-556. He took it back and I never tried another in the Ruger. My AR only picks up lead around the bolt tail and the back of the BCG and both are easy to clean.

Let us know how it works.

Boom Boom · Sep 21, 2017

GeorgeSSR said:
Picked up a diamond wheel to give this a shot. Wish me luck!

Good luck! You can do it. Take your time. I've made two obsolete firing pins out of rod stock for my vintage rifles using a Dremel to cut to size and carefully shape it. Took hours to make each pin, taking off a little material at a time, test fitting, and repeat. My first try was a failure but it worked great the second and third tries. The rifles fire perfectly with the new pins.

John from MD · Sep 21, 2017

Boom Boom said:
Good luck! You can do it. Take your time. I've made two obsolete firing pins out of rod stock for my vintage rifles using a Dremel to cut to size and carefully shape it. Took hours to make each pin, taking off a little material at a time, test fitting, and repeat. My first try was a failure but it worked great the second and third tries. The rifles fire perfectly with the new pins.

I did the same on a 1800's era double barrel that I use to shoot blanks in. There were no firing pins available so I just took a landscape nail and started grinding. Case hardened it when I was sure it worked and it has been working now for about 26 years. :lol:

GeorgeSSR · Sep 23, 2017

John from MD said:
piece of cake. I would spread some anti seize on it so it comes out easier if you are getting lots of lead and lube from the .22's. Did you buy your kit from Jon Ciener? I had one of his first Attichson (SP?) .22 kits that I could never get to work in the ac-556. He took it back and I never tried another in the Ruger. My AR only picks up lead around the bolt tail and the back of the BCG and both are easy to clean.

Let us know how it works.

Going to do some drill bit cutting tomorrow, but about the kit: came with the rifle from the previous owner with two original magazines and I've been able to get it to run well enough (lots of polishing that ramp and chamber adapter) that I want to leave it in. One magazine runs almost perfectly every time (no more than any other .22) and the other has an occasional failure to feed (weak spring?).

Since picking up the MG I also picked up a pair of Black Dog magazines that I can rarely get to work for more than 10 or so shots. They seem to sit at the right angle and height, but I get a ton of stovepipes (sometimes with the next round in the chamber, sometimes the chamber is empty). Minor surprise as my other BDM magazines run perfectly in my AR-22. I don't consider myself a smith, but I'm thinking of trying some other springs on them. Doesn't the stove-piping indicate weak ejection and low bolt velocity? Maybe the spring is too strong and making the bolt drag?

John from MD · Sep 23, 2017

With autos, the recoil and mag spring tension is very important. Some times the spring can be feeding faster than the bolt can handle it. Conversely, the mag lags behind the bolt.

.22 conversion kits take the cake. The best .22 mags I have are the metal ones I bought from Ciener years ago. I have used Black Dog and CMMG and almost have to buy a dozen to get a half dozen to work all the time. :sad20:

Need part fabricated for Mini-14/AC-556

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