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!927 A1 custom project


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#1 choppero

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Posted 17 January 2019 - 12:49 PM

Attached File  thomp1.jpg   38.93K   55 downloadsI've started a series of mods to my 27A1 to add a more original look and functions.

 

1..Change out the original barrel with a Green Mt finned 14"+ and add the compensator. Turns out Kahr presses these on so I had to make a threaded adapter to screw on and weld the compensator to bring the l            length  to 16".

2. Next add one of my stock adapters to the lower.

3. Make a EZ take down button so the stock removes without tools.

4. Install EZ pull springs and buffer.

5. Drill holes for 28 style selector switch and make a selector that also functions as a bolt hold open to eliminate the "third hand" when inserting a drum. It also entails making a whole new pawl that is controlled by the     selctor. and modyfing other parts to accomodate the new switch.

6. Checker the stock slide latch button..

 

My next step will be to weld the adapter seam and screw holes then machine back to the grip area and recontour. Welding is tricky on these frames as they will warp if too much heat is applied to any one area.

I am also considering milling the frame to match the 1928 where the stock slide almost touche the frame and then adding an original 28 grip complete with locating rib.

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#2 Hossbreed45

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Posted 17 January 2019 - 06:55 PM

Sweet!


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#3 peter kohler

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Posted 18 January 2019 - 08:13 AM

nice.    I just had dan do the mods like that for my 28, but he did the 10.5 inch blank fire barrel so I can use it for reenacting or live if I want to change barrels.      the hold open selector really helps with removal of the drum!    now im getting ready to do a 27 I picked up pretty much the same way.  keep us posted on your progress  


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#4 choppero

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Posted 18 January 2019 - 11:12 AM

Thanks, I'll post as I go on. My hold open was inspired by one that i was asked to copy many years ago by tommygunner.com (Damon) . It used a wire spring to activate from a modified 28 selector. When I decided to get back into Thompson conversions, I could not copy someone and feel right about it. My new design uses a different method and a selector made from scratch. As is the pawl design. I'm just a small town gunsmith with a nice bunch of tools, and I like the challenge of working out new ideas. 


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#5 Paladin601

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Posted 18 January 2019 - 02:22 PM

Very nice!


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#6 choppero

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Posted 19 January 2019 - 12:55 PM

Does anyone know the lines per inch of the colt checkering? I did 48 on the latch button and it looks to be too much.

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#7 Broadarrowmaint

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Posted 19 January 2019 - 11:37 PM

Hope this helps. Off an original M1928 buttstock

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#8 choppero

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Posted 20 January 2019 - 09:36 AM

thanks I think I can count lines and compare 


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#9 choppero

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Posted 15 February 2019 - 03:41 PM

I have purchased 3 new cast stock slides to see how they compare to each other as far as adapter lock up. Their all different. I will start selling custom fit adapter plates from my web site www.shop.lcgnm.com today. They have minimal front to back and side to side play.


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#10 choppero

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Posted 15 February 2019 - 08:04 PM

Now I am milling the paddle selector for the 28. Both Colt and Savage style. What I need is a volunteer with a 28 to check the function.


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#11 peter kohler

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Posted 16 February 2019 - 07:46 AM

really enjoy articles like this   keep us posted on the project!!!


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#12 deerslayer

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Posted 16 February 2019 - 05:11 PM

I can test your selector if you like.
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#13 mnshooter

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Posted 16 February 2019 - 07:17 PM

30 LPI checkering for both Colt and GI stock latches.  The checkering is at 90 degrees, not a diamond pattern.

There doesn't seem to be a concern with alignment -not exactly parallel or perpendicular to the gun, even on Colts.


Edited by mnshooter, 16 February 2019 - 07:19 PM.

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#14 choppero

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Posted 17 February 2019 - 08:19 PM

30 LPI checkering for both Colt and GI stock latches.  The checkering is at 90 degrees, not a diamond pattern.

There doesn't seem to be a concern with alignment -not exactly parallel or perpendicular to the gun, even on Colts.

Thank you for that. does the colt rocker switch have the same pattern?


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#15 choppero

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Posted 10 April 2019 - 07:56 PM

Thanks to deerslayer I have made new rocker selector switches in Colt and Savage style

Attached File  IMG_0556.JPG   136.57K   7 downloadsAttached File  IMG_0557.JPG   131.42K   6 downloads

 

For sale shop.lcgnm.com


Edited by choppero, 10 April 2019 - 07:57 PM.

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#16 deerslayer

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Posted 11 April 2019 - 09:54 PM

Looks great!
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#17 Baltimoreed11754

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Posted 21 April 2019 - 08:39 AM

I like your build. Very nice. Its the small details that make the difference between average and wow. Ive rebuilt a few things. Built a Winchester M12 into a trench gun and last year I finished converting a Mini30 into a Vietnam era M1a lookalike. Just started on a Mini300blkout into a Garand T20 [magazine fed, full auto experimental version of the Garand][ mines a semi]. When I start my sbr 1927a1 build Ill post it.

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Edited by Baltimoreed11754, 21 April 2019 - 01:21 PM.

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#18 Hossbreed45

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Posted 21 April 2019 - 08:46 AM

Yes very nice.

 

Makes me wish I had taken some machinist courses way back when!

 

:wacko: 


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#19 choppero

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Posted 15 July 2019 - 09:44 AM

I just completed a full conversion to a customer Kahr 1927A1. It included milling the receiver to eliminate the scallops and making a new adaptor for the butt stock slide, engraving the FULL AUTO/SINGLE for the new bolt hold open conversion, modified sear and disconnector, new designed hold open pawl and selector switch. 

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Edited by choppero, 15 July 2019 - 09:47 AM.

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#20 deerslayer

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Posted 15 July 2019 - 03:46 PM

Looks great!
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