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My 50 Round Mag - Cutter's drawings


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#1 Jeff E

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Posted 20 August 2012 - 06:07 PM

Just finished my 50 round magazine based on Cutter's drawings (Thank you Jerry) and thought I'd post a few pictures. My barrel plate gear is an integral part of the barrel plate since I'm starting on my second version of the RGG gun. The magazine appears to work great - but still need to build the mount for it.

Jeff

 

Attached File  50 Round Mag Parts-id=946.jpg   151.99KB   3 downloads

 

Attached File  Assembled Mag_1-id=945.jpg   88.27KB   1 downloads

 

Attached File  Assembled Mag_2-id=944.jpg   152.17KB   1 downloads

 

Attached File  Barrel Plate Gear-id=943.jpg   138.47KB   1 downloads

 

 



#2 Cutter

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Posted 21 August 2012 - 02:24 PM

Very nice work Jeff !
I feel like a proud grandfather

#3 Cutter

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Posted 23 August 2012 - 08:10 PM

Jeff,
I was waiting for someone else to jump in, but
I have to ask.
What's the bluish material for the housing ?

#4 lawman1331

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Posted 24 August 2012 - 01:45 AM

Jeff,
Nice job on Cutters drum magazine! I was looking at the last picture you posted. I am not sure what you did. It looks like you chamfered the barrels. It that correct? Also what changes did you make to the carrier block and bolts?

#5 Jeff E

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Posted 24 August 2012 - 02:28 AM

Jeff,
I was waiting for someone else to jump in, but
I have to ask.
What's the bluish material for the housing ?


Cutter,

The material is aluminum oxide blasted steel tubing. My plans are to Cerakote the assembly eventually.

Jeff

#6 Jeff E

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Posted 24 August 2012 - 03:24 AM

Jeff,
Nice job on Cutters drum magazine! I was looking at the last picture you posted. I am not sure what you did. It looks like you chamfered the barrels. It that correct? Also what changes did you make to the carrier block and bolts?


Lawman,

I did indeed chamfer the barrels. This was done after I read this article http://www.6mmbr.com/gunweek089.html- seemed to fix several issues with barrel and extractor alignment. I also modified the the bolts and the bolt carrier based on my disappointment with these portions of my first RGG build. Many have made one piece bolts but I wanted to make a bolt that addressed several issues:

1) Little or no silver soldering - did not quite meet this goal the cam follower is solder to the bolt
2) Adjustable firing pin length
3) No rotation of firing pin and thus I could make it any shape that I wanted
4) Better extraction and ejection

So I came up with my own version of the bolt that is .5 inch from end to end with dual extractors and a ejection system based on a bolt action rifle. The odd shape you see in the base of the bolt carrier in each bolt slot is the ejection trip mechanism.

None of this is really field tested but works very well in my proto type.

I attached a couple pictures that give some more detail of the bolts construction.

Jeff

 

 

Attached File  Bolt-id=949.jpg   98.57KB   1 downloads

 

Attached File  Bolt Carrier-id=948.jpg   112.43KB   2 downloads



#7 bruski

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Posted 24 August 2012 - 06:03 PM

WOW Jeff,
Your modifications are clever and look great. Please keep us posted after you have done some field testing with your modifications.
bruski

#8 Jeff E

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Posted 12 November 2012 - 10:31 PM

Cutter's recent Six Shooter post prompted me to update my progress on my Gatling gun primarily in the rear gear assembly area. I have encapsulated most of the gear and crank into a single removable assembly.

Jeff

 

Attached File  IMG_0333-id=1071.jpg   63.41KB   0 downloads

 

Attached File  IMG_0330-id=1070.jpg   54.2KB   0 downloads

 

Attached File  IMG_0332-id=1069.jpg   54.84KB   1 downloads

 

Attached File  Rear Gear Assy Being removed -id=1068.jpg   62.26KB   0 downloads

 

Attached File  Rear GEar Assy Missing-id=1067.jpg   58.51KB   0 downloads

 

 



#9 Jeff E

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Posted 12 November 2012 - 10:36 PM

A few more pictures....

 

Attached File  IMG_0329-id=1074.jpg   50.57KB   1 downloads

 

Attached File  IMG_0328-id=1073.jpg   47.68KB   0 downloads

 

Attached File  IMG_0327-id=1072.jpg   50.66KB   0 downloads

 



#10 Cutter

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Posted 13 November 2012 - 03:33 PM

Jeff,
Very nice modifications, that's looking cool.
Can't wait to see it painted
Thanks for the pictures

Jerry/Cutter

#11 Cutter

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Posted 26 May 2013 - 02:53 PM

Hi Jeff,
In one picture of your gun, there appears to be a horizontally mounted gear
in your extraction port.
I can't figure that out. What is it ?

Regards
Jerry

#12 Jeff E

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Posted 26 May 2013 - 06:21 PM

Jerry,

I found the picture you are referring to and it indeed it looks like a gear. But I can assure you there is no gear. Darned if I know what it is in the picture.


Jeff

#13 Cutter

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Posted 29 May 2013 - 03:39 PM

Thanks Jeff,
I guess the light and shadow creates the elusion
from your geared barrel plate. Looks cool anyway

Jerry

#14 42rocker

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Posted 16 November 2013 - 03:31 AM

Just have to ask -- How did the double extractor and tapered barrels and bolt changes work out for you??

Nice Work!

Later 42rocker

#15 Jeff E

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Posted 16 November 2013 - 05:06 PM

Just have to ask -- How did the double extractor and tapered barrels and bolt changes work out for you??

Nice Work!

Later 42rocker


The bolt changes actually work very well - the extractors have never failed to pull and flip out fired or un-fired cartridges (even my very beat up test cartridges). The concave taper barrels also work well - no extractor alignment issues or firing pin pock marks. I also lock the barrels in position with a simple allen set screw on a flat on the barrel which means I can adjust the head space on a per barrel basis - some may think this is not secure enough but so far no problems (a least on a .22 version).

The problem I have encountered is the feeding of the bullet has to be more precise than in the original design. This is a by product of the flat guide for the bolt. If the bullet doesn't hit the near the center of the guide when it drops then it is likely going fall to the side and jam - making proper firing operation very dependent on cranking speed. I think I have a solution but have not finish building it yet - so who knows if it will be the right answer.

Jeff

#16 42rocker

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Posted 16 November 2013 - 05:23 PM

Jeff
Thanks for the update. Several of us (see my intro thread) are planning to make personal RG-G Gatlings starting in Jan, 2014. So trying to gather as much info whats good bad, new ideas, best of etc. before we start.

Any thoughts or improvements ideas would be great.

Later 42rocker

#17 Jeff E

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Posted 16 February 2014 - 10:15 PM

Cutter and others,

Cutter - Since you have been making several variations of drum magazines I wondered if you or anyone else ever considered modifying one of these.

AR15.22 50RD DRUM - they are $60 bucks at other sources.

http://blackdogmachi...15-22-50rd.aspx


Seems to me it would be fairly easy to make a new drum tower (their name for the final piece that snaps into the gun) and have a usable 50 round magazine.

Granted it does not have the era look of the gat but would be a nice experiment and could be covered if desired.
I especially like the rotor section that looks like a over grown gear to keep the round separated while feeding.

I have ordered one to experiment with so will keep the group posted.


Jeff

[attachment=0]Black_Dog_Drum.jpg[/attachment]
[attachment=1]Blackdog drum 2.jpg[/attachment]

#18 Cutter

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Posted 17 February 2014 - 04:12 PM

Jeff,
I have seen them offered on line, but never thought about
adapting for a gat. I'll be following your progress, good luck

Jerry

#19 42rocker

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Posted 18 February 2014 - 02:03 AM

Note from everything that I've heard about that drum is that it takes a break in period. Don't think about loading 50 in and it working perfect first time out is what I've heard. That said they say after a break in and good loading you can run 45 to 50 rds no problem.

So can anyone get one to work on a gatling??

Still think I'm going to try to follow cutters design. Thanks

Later 42rocker




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