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Thread: PTR44 Semi-Auto MP44

  1. #471
    Senior Member Model's Avatar
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    Quote Originally Posted by Intruder196 View Post
    Can you elaborate on what was wrong with the replacement recon ord bolt?
    It's out of spec, Shortfall was unable to properly fit it in my Gun. That Fu**ing thing cost me $500.00!! The only good thing about was I was able to sell it off for $300.00 so I'm only out $200.00. Still to this day it bothers Me that I was told this was combatable with my PTR44. I did have it (somewhat) running in the Gun however it was completely unreliable.
    HDH.

  2. #472
    Senior Member GunKraut's Avatar
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    Swapping PTR parts with MP44 parts wasn't easy with my rifle. Some problems:
    1) U-shaped denial piece in the back end of the receiver prevented insertion of original bolt; needed to be removed
    2) Charging handle slot too narrow for original MP44 op-rod; root of charging handle needed to be machined down
    3) Ejector slot in MP44 bolt not deep enough, causing PTR ejector to press the MP44 bolt against RHS receiver wall --> binding; ejector needed to be filed down
    4) Top of MP44 bolt binds up in trunnion right before bolt goes into battery; bolt needs to be shaved (I gave up at this point, what a meritless exercise!)

  3. #473
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    Default bolt issue

    Quote Originally Posted by Model View Post
    It's out of spec, Shortfall was unable to properly fit it in my Gun. That Fu**ing thing cost me $500.00!! The only good thing about was I was able to sell it off for $300.00 so I'm only out $200.00. Still to this day it bothers Me that I was told this was combatable with my PTR44. I did have it (somewhat) running in the Gun however it was completely unreliable.
    I remember that bolt. It was told to me that the Recon bolts were made with the locking surface purposely longer supposedly to help with headspace issues a particular rifle might have. Problem is that if the bolt will not drop down to lock after contacting the barrel face the locking surface must be machined (at the proper angle) until it does. That bolt had suffered an attempt ( by a prior repairer) to reduce that surface but so poorly done that the surface was rounded off and that angle was lost, plus it still would not go into battery unless slammed hard. Add to that the extractor pin holes were not in line such that the pin had to be driven in with a punch and hammer blows. The extractor with the bolt was poorly machined and not an exact duplicate of an original WW2 part.
    Maybe Model got a oddball bad one but it was what it was. If I remember right a original bolt went right in and worked fine.
    Pete

  4. #474
    Senior Member Model's Avatar
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    Quote Originally Posted by shortfal View Post
    I remember that bolt. It was told to me that the Recon bolts were made with the locking surface purposely longer supposedly to help with headspace issues a particular rifle might have. Problem is that if the bolt will not drop down to lock after contacting the barrel face the locking surface must be machined (at the proper angle) until it does. That bolt had suffered an attempt ( by a prior repairer) to reduce that surface but so poorly done that the surface was rounded off and that angle was lost, plus it still would not go into battery unless slammed hard. Add to that the extractor pin holes were not in line such that the pin had to be driven in with a punch and hammer blows. The extractor with the bolt was poorly machined and not an exact duplicate of an original WW2 part.
    Maybe Model got a oddball bad one but it was what it was. If I remember right a original bolt went right in and worked fine.
    Pete





    This is true, you fixed it Pete and that's the bottom line.

    I could go on and wine about other people (two of which were highly recommend to me) who worked on my PTR44 but I won't. It's all water under the bridge now, time to move on.
    Last edited by Model; 11-02-2017 at 09:43 PM.
    HDH.

  5. #475
    Senior Member GunKraut's Avatar
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    Default Miller Time

    As in Miller MIG welder...
    Steyr MP44 receiver converted to semi auto with ample denial blocks. F/A hook on WW2 op rod eliminated, carbide steel plate welded into receiver to interfere with auto sear hook on original F/A op rods. PTR44 semi auto trigger pack with Recon 922(r) parts. Recon stock, grips, mag follower and mag floor plate. Shortfal trunnion, modified Yugo M76 922(r) barrel. California compliant fixed 10 rd magazine (pain in the ass to load).

    mp441.JPG mp442.jpg

  6. #476
    Senior Member pitfighter's Avatar
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    Quote Originally Posted by GunKraut View Post
    As in Miller MIG welder...
    Steyr MP44 receiver converted to semi auto with ample denial blocks. F/A hook on WW2 op rod eliminated, carbide steel plate welded into receiver to interfere with auto sear hook on original F/A op rods. PTR44 semi auto trigger pack with Recon 922(r) parts. Recon stock, grips, mag follower and mag floor plate. Shortfal trunnion, modified Yugo M76 922(r) barrel. California compliant fixed 10 rd magazine (pain in the ass to load).

    mp441.JPG mp442.jpg
    Nice -

    Pretty close to what we did - except, I ended up also putting pins through the barrel - as we only really use it for blanks - don't you love California - ?

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