Disassembly: Frommer Stop

The Frommer Stop can be a real hassle to tackle without proper instruction.  We took one apart half blind so you don’t have to.  Read below for step by step instructions on how to field strip this tiny Hungarian monstrosity.

 

 

 

Section I: The Field Strip

Parts Guide:

  1. Pistol Body
  2. Magazine
  3. Barrel Nut Retainer
  4. Barrel Nut
  5. Barrel Guide
  6. Recoil Spring
  7. Recoil Spring Guide
  8. Barrel
  9. Cocking Knob/Bolt Body
  10. Bolt Head

 

How to Field Strip the Frommer Stop:

 

1. Remove the Magazine Clear the chamber.  Safety first!

 

 

 

 

 

2. Depress the Barrel Nut Retainer.  Some sources suggest using the corner of the magazine.  We personally recommend a slim nylon punch.

 

3. While still depressing the Barrel Nut Retainer, unscrew the Barrel Nut.

 

 

 

 

CAUTION! The Recoil Spring is behind this retainer and under pressure.  Hold the top of the now exposed Barrel Guide with your thumb until directed otherwise.

 

 

 

 

 

 

4. Grip the Cocking Knob  and cock the pistol.  It should lock open.

 

 

 

 

 

 

 

5. Still holding the Barrel Guide at the top, use your punch to gently pop it out.  CAUTION! Again, this is under pressure and be prepared to have the spring bear against your thumb.  Release the pressure slowly on the Barrel Guide and let the Recoil Spring  out.

 

6. Set aside the Recoil Spring, Barrel Nut Retainer, and Barrel Nut, we will need the Barrel Guide so keep it handy.

 

 

 

7. The Barrel and Bolt Body are now pressed together.  Because this is a Long Recoil gun the bolt won’t move home until the barrel is all the way forward.  Hold the Cocking Knob and push/pull the Barrel all the way forward.  Then let Bolt Body slide back forward.  Some may note that this and step 5 are unnecessary and are not in other instructions.  I assure you that the extra steps beat losing an eye or chasing the Barrel Nut Retainer across the room when that spring lets loose.

 

8. Now hold the Cocking Knob to the Pistol Body until otherwise directed.

 

9. The Barrel Guide has a notch at the top for use on the Recoil Spring Guide tip.  Use it to depress and rotate the Recoil Spring Guide 1/4 turn.  When you depress a nub will project at the rear of the gun at the top of the Cocking Knob.  When you release the Recoil Spring after turning, this nub should recess into the pistol.  If it is still projecting you have either over turned or not turned far enough.

 

 

 

 

10. Pull the Bolt Body and Barrel to the rear and out of the pistol.  You may pull the Bolt Body and Barrel apart.

 

11. The Bolt Head can be pulled from the Bolt Body with a little turning while tugging.

 

 

 

 

 

 

12. Depress and rotate the Recoil Spring Guide for another 1/4 turn to release it.

 

 

 

Your Frommer Stop is now field stripped.
Reassembly is just in the reverse but here are a few tips:

 

Pull the bolt head out and rotate a bit to line up the lug before returning to the bolt body

 

 

 

 

 

Depress the bolt catch with a small screwdriver or other slim tool when replacing the barrel and bolt body into the pistol

 

Remember that the bolt will not seat home until the barrel is all the way forward

 

When replacing the barrel nut, make sure it is flush with the barrel to be certain you’ve tightened far enough.

Section II: The Complete Disassembly

Parts Guide:

  1. Frame
  2. Magazine
  3. Barrel Nut Retainer
  4. Barrel Nut
  5. Barrel Guide
  6. Recoil Spring
  7. Recoil Spring Guide
  8. Bolt Return Spring
  9. Barrel
  10. Bolt Body
  11. Bolt Head
  12. Extractor
  13. Firing Pin
  14. Firing Pin Spring
  15. Grip
  16. Grip Screw
  17. Hammer
  18. Hammer Spring and Plunger
  19. Hammer Pin
  20. Grip Safety
  21. Grip Safety Spring
  22. Grip Safety Pin
  23. Lanyard Loop
  24. Magazine Catch
  25. Magazine Catch Pin
  26. Trigger
  27. Trigger Pin
  28. Trigger Spring
  29. Trigger Bar
  30. Trigger Bar Pin
  31. Disconnector Pin
  32. Bolt Catch
  33. Bolt Catch Pin
  34. Sear
  35. Sear Spring
  36. Sear Pin

How to completely disassemble the Frommer Stop:

1.  Gently, gently pry up the Extractor with a small screwdriver.  Try to keep even pressure against its whole length.  As it rises you can rotate carefully clock-wise and pull it free of the Bolt Head. CAUTION! The Firing Pin and Firing Pin Spring are contained inside under pressure.  They will be released when the Extractor is pulled out.  Make sure to point them somewhere safe and padded.

2.  If they have not flown free, pull out the Firing Pin and fish out the Firing Pin Spring.

 

 

3.  Unscrew the Grip Screw.  Be careful to check on the other side.  The Grip Screw is threaded into a nut attached to the left side grip.  It may have come loose and may free spin in the Grip.  If this is the case you’ll need to find a way to anchor the nut.  Then remove the Grip.

4.  Hold the Hammer, pull the Trigger, and ease the Hammer forward gently.

 

 

 

 

5.  Drift out the Hammer Pin.  You may now remove the Hammer and the Hammer Spring and Plunger.

6.  Drift out the Grip Safety Pin.  You may now remove the Grip Safety, Grip Safety Spring, and Lanyard Loop.

7.  Drift out the Magazine Catch Pin. You may now remove the Magazine Catch.

 

 

 

8. Drift out the Trigger Pin and then the Trigger Bar Pin.  You may now remove the Trigger Bar rearward.  This may be snug in the Trigger and require a fair about of wiggling and pulling.  Remove the Trigger forward.

 

 

 

 

 

9.  Drift out the Disconnector Pin.

 

 

 

 

 

 

10.  Drift out the Bolt Catch Pin and remove the Bolt Catch from the rear of the Frame.

11.  Drift out the Sear Pin and remove the Sear and the Sear Spring from the inside of the Frame through the grip area.

12. The ejector spring set in the barrel has a very likely chance of snapping if removed and should be left alone unless absolutely necessary.

Your Frommer Stop is now fully disassembled!

 

Reassembly tips:

Go Slow

Replace the sear and drive its pin, then place the sear spring on top, then lower the bolt catch down on top of it and push into place with your pinky and hold. Now drop in the pin.

When driving the disconnector pin, the flat side goes up.

Replacing the trigger is a butt.  Replace just the trigger and drive its pin in place. Now set the trigger bar (lots of shoving) and line it up.  You’ll probably notice you lack the necessary clearance to drive the trigger bar pin.  If so, drift the trigger pin back out, set the trigger bar, push the spring in, then reset the trigger.  Yeesh!

Lining up the grip safety was the hardest part for us.  Getting it and the lanyard loop in the right spot at the same time isn’t easy.  Use a zip tie around the frame’s grip area to compress the safety and use a pilot pin to keep things lined up as you drive the pin back in.
 

 

4 Responses to “Disassembly: Frommer Stop”

  1. PCShogun says:

    Very nice.

    I had seen a few examples of this odd looking pistol and could never figure out the purpose of the top “Tube” over the barrel. I knew it was a spring guide but it never made sense.

    Looking at this guide, I now see the long recoil design with its two spring return system and it makes sense, sorta.

    Thanks for the information.

  2. These are really nice photos. I am looking forward to more articles.

  3. Steve says:

    I was trying to take my Frommer apart, but i managed to get the slide locked back with the barrel bushing and spring removed. Cant get the slide back forward…any suggestions? Nothing seems to work. Thanks!

    • Nagao says:

      If I understand your trouble correctly, this would be a function of the Long Recoil action on that pistol of yours.

      The bolt and cocking piece won’t release until the barrel is all the way forward. Try grabbing the barrel while keeping a hold of the cocking piece. Pull it forward until you feel it “click” into place. This moves the sear out of the way of the bolt. You should now be able to let it forward as well.

      You can see the sear in action in the animation on this page:
      http://candrsenal.com/pistol-frommer-stop/

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