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Lots of progress made! Injection molding machine is finished, mold received on Saturday, and I spent all weekend experimenting with different plastics, colors, temperatures, etc. Smashed my finger along the way, really a dumb move. I managed to make 2 good parts, a few marginal ones, and a bunch of bad ones! I learned that clear polycarbonate material is a no-go, really brittle and not suited well to my setup. Part shattered in the mold and it took me almost two hours to get the pieces out. I found a couple of materials that worked well, made one of each. I will send the parts out tomorrow to shortactionsmoker for testing. If all goes well there it will be time to ramp up production! I contacted Paypal last week and received clearance that this part does NOT violate their acceptable use policy so that makes things easier.

Here are a few pictures:
[Linked Image]
[Linked Image]
[Linked Image]


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Very cool


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cotis -

I assume you looked into Ruger patents regarding the part before spending time and money on this project?


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That's great!

Cost?

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Those things are uber.



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Don't have a RAR (Yet!), which one is your part and what is this going to remedy?

Thanks,

Jerry


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Current RAR 223 mags have a molded in block that keeps one from loading 75's and other 'sleek' pills.


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Originally Posted by Coyote_Hunter
cotis -

I assume you looked into Ruger patents regarding the part before spending time and money on this project?


Yes, there are no intellectual property issues with this item. Same reason it is not patentable.


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Impressive! Now if you just make some 75 amax bullets.



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Just picked up my new Ruger American Predator yesterday! Really looking forward to the new magazine mod.

Will you need to modify existing magazines, or will you be selling them whole?

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I am not selling whole magazines. I will do the installation of the new rear portion if you send me the magazine(s).


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Will you sell just the parts, so that someone can do the modification themselves? Will there be any other payment available other than paypal, such as check, or Postal MO, or credit card?

Do you have a price yet?

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My main plan is to sell just the part. I figured I would offer the installation service for anyone who didn't want to mess with it themselves. I hope to accept payments from almost any source, just please don't send me rolls of pennies! The Paypal and credit card processing may have a small fee added to cover some of my expense of that. Not positive as I haven't figured all that out yet.

I will produce a "how-to" instruction sheet with photos detailing the swap.

My price will be $25 for one, $45 for two, and $60 for 3. Want to buy a bunch, contact me and we'll talk! Shipping is included in the price.

I follow the golden rule - treat others as you want to be treated - so if there is a problem I will make it right. You wouldn't believe the amount of time and money I have spent on this in the last several months. My main goal here is simply to make my money back on this project! I could have bought a nice Cooper or Blaser rifle with what I have tied up in this, several if you put a dollar value on my time. Why I am doing all of this, that's a darn good question (I ask myself that sometimes, esp. after I smashed my finger working on it this weekend). I am one of those types that loves to tinker and solve problems, and this looked like a fun one to solve. Want to hear something funny? I don't even own one of these Ruger American rifles in .223 yet! Combine that with an entrepreneurial spirit and you find someone who is rarely bored. I have already ordered some bluetooth hardware for my next project, wireless control of a Pro Chrono chronograph using your cell phone!

I am still determining how long it takes me to make one. My manufacturing is a very manual operation and I still have to do some post-injection processing on the part. The three locking tabs need to be glued into the main body. Also, one of the holes for the mating tab is proving to be VERY difficult. you can actually see this in the 1st picture of this thread, it's the part in the upper left corner of the picture. There is a very thin-wall condition going on where the plastic does not want to flow. It is even a problem on the factory part from Ruger, the two I have from them both show problems in this area. I guarantee you they are using a bigger injection press than I am! I have removed the tab from my mold so it actually gets injected as a positive, then I cut the positive off and manually machine in the negative slot. Delicate work as the walls that are left are less than 1 mm thick.

Thanks for the interest and support! Chaz


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Thank you for your entrepreneurial spirit! I'll take 2 when they are available grin

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I am in!


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I will take one !


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2 for me !


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Put me down for one as well, thanks


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Nice work, cotis. Am awaiting their release.


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I don't own one either but I am in for two. Let me know when to send the money.

Dink

Last edited by DINK; 06/18/14.
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