Countryboy77 Posted May 4 Report Share Posted May 4 I would swap the entire lower and whatever West hurley parts on top. Get rear sight properly fitted ,a GI front grip hanger and of course any bolt parts or even the bolt if not Gi.The Registered Receiver is what you purchased and if you want it up to par,swap everything Gi,barrel has to come out anyway,put a proper spec barrel too. Protect your investment. You can always keep the Original parts so if you sell it you have a nice package,or return it original and sell off the gi parts. But being a MG you cannot have enough spare parts Link to comment Share on other sites More sharing options...
Countryboy77 Posted May 4 Report Share Posted May 4 On 5/3/2026 at 5:07 PM, Bridgeport28A1 said: I am trying to visualize what hammer pin pads in the receiver would look like. any chance for a photo or two, unless they are a PK Diamond K proprietary design. I also wonder what Hammer pin pads would look like. And Im a firm believer if not in the Original design,not necessary. If tge pin moving was an issue a drop of lock tight or a peened edge on the bolt preventing it from floating out of place. I just wonder what they look like and where they go. Link to comment Share on other sites More sharing options...
Doug Quaid Posted May 4 Report Share Posted May 4 3 hours ago, Countryboy77 said: I would swap the entire lower and whatever West hurley parts on top. Get rear sight properly fitted ,a GI front grip hanger and of course any bolt parts or even the bolt if not Gi.The Registered Receiver is what you purchased and if you want it up to par,swap everything Gi,barrel has to come out anyway,put a proper spec barrel too. Protect your investment. You can always keep the Original parts so if you sell it you have a nice package,or return it original and sell off the gi parts. But being a MG you cannot have enough spare parts Maybe an advanced collector would want the original WH parts as curiosities, but I doubt they would add to the resale value. When people buy Group Industries UZIs, they generally throw the Group made parts away. Like the bolts, for example. Link to comment Share on other sites More sharing options...
Doug Quaid Posted May 4 Report Share Posted May 4 On 5/2/2026 at 1:55 PM, Cipher032 said: Upon closer inspection, a previous owner already went about replacing the internals with GI parts. Just as a head's up, for some reason the WWII AOC and Savage blish locks are slightly different sizes. I have an original 1940 Savage Thompson and the AOC lock will not install in the gun. Link to comment Share on other sites More sharing options...
Countryboy77 Posted May 5 Report Share Posted May 5 7 hours ago, Doug Quaid said: Just as a head's up, for some reason the WWII AOC and Savage blish locks are slightly different sizes. I have an original 1940 Savage Thompson and the AOC lock will not install in the gun. Thats interesting as i thought on Original thompsons Colt era and ww2 era i thought tgey swapped gun to gun and the only issues were the West Hurleys with badlu cut blish lock slots. Is it only the blish locks or any other parts that dont swap 28 to 28 Link to comment Share on other sites More sharing options...
TD. Posted May 5 Report Share Posted May 5 Doug Quaid, Over the years I have seen some Blish locks not fit in some guns. Manufacturing tolerances? Link to comment Share on other sites More sharing options...
TD. Posted May 5 Report Share Posted May 5 Show below is an example of PK's work involving the replacement of the Blish lock slots on my West Hurley Thompson. These "new" locks have survived a number of C drum dumps over the years. I was at a private machine gun shoot last week and someone ask me if I had any Thompson magazines. I told them only these round ones pointing to my two C drums on the table. I would like to know if John Andrewski does this or something like this with the slots. I would not be afraid to purchase another West Hurley if PK. had an apprentice working with him. Link to comment Share on other sites More sharing options...
Bridgeport28A1 Posted May 5 Report Share Posted May 5 On 5/4/2026 at 10:40 AM, Cipher032 said: For anyone following this thread who also is wondering about the gouges in the Blish lock slots, I found this thread with a comment from PK at the end: The gouges are due to the machining process for WH receivers. Interesting comment from PK on March 10, 2020 in the thread about the gouges. I still want to see a photo of the hammer pin pads. Link to comment Share on other sites More sharing options...
villafuego Posted May 7 Report Share Posted May 7 (edited) On 5/5/2026 at 12:24 PM, Bridgeport28A1 said: Interesting comment from PK on March 10, 2020 in the thread about the gouges. I still want to see a photo of the hammer pin pads. They are pictured in TD's post above yours ...... I circled in yellow Edited May 7 by villafuego Link to comment Share on other sites More sharing options...
Bridgeport28A1 Posted May 7 Report Share Posted May 7 7 minutes ago, villafuego said: They are pictured in TD's post above yours ...... I circled in yellow Thank you Link to comment Share on other sites More sharing options...
Cipher032 Posted May 8 Author Report Share Posted May 8 Got a 1928 parts kit in from 1944 Militaria. With the new lower I’ve now got no issues with magazines. Dropped in the breech oiler. Contacted and sent payment to PK for the hybrid buffer; eagerly awaiting its arrival. Link to comment Share on other sites More sharing options...
Doug Quaid Posted May 10 Report Share Posted May 10 (edited) On 5/5/2026 at 9:10 AM, TD. said: Doug Quaid, Over the years I have seen some Blish locks not fit in some guns. Manufacturing tolerances? I don't think it is a manufacturing tolerance. AOC locks are much larger. And they are more squared off. They won't even come close to fitting in my Savage. Edited May 10 by Doug Quaid Link to comment Share on other sites More sharing options...
TD. Posted May 10 Report Share Posted May 10 Just a guess: I am thinking there may be a final manufacturing process that rounds off all the sharp edges on the Blish lock. Would "tumbling" or the lack thereof apply to this squared off AOC marked Blish lock? Link to comment Share on other sites More sharing options...
Doug Quaid Posted May 10 Report Share Posted May 10 (edited) 55 minutes ago, TD. said: Just a guess: I am thinking there may be a final manufacturing process that rounds off all the sharp edges on the Blish lock. Would "tumbling" or the lack thereof apply to this squared off AOC marked Blish lock? That's not a bad guess at all. Maybe AOC saw that rounding off the edges of the blish lock was an unneeded extra step, so they just left them squared off and made the slots in the receiver slightly larger. My 1928 is a pretty early gun, ser. # 17,XXX. And that AOC lock absolutely would not fit at all. But the savage one fits perfectly. This topic could probably use its own thread. We need someone with an AOC to check the fit of a savage blish lock. Edited May 10 by Doug Quaid Link to comment Share on other sites More sharing options...
gijive Posted May 10 Report Share Posted May 10 All, I have owned three (3) Colt made Thompson Submachine Guns in my lifetime. All three were obviously made before Savage and AOC started making Blish locks for their guns at the outbreak of WWII. I have used Savage and AOC Blish locks in all of my Colt guns for shooting purposes and have never had a problem. I had mostly Savage Blish locks, but had about three AOC marked ones. All of them fit and functioned as they were supposed to. If an AOC Blish Lock doesn't fit in a Savage gun, I would think it had something to do with the aforementioned manufacturing tolerances. Link to comment Share on other sites More sharing options...
dalbert Posted May 11 Report Share Posted May 11 On 5/5/2026 at 9:19 AM, TD. said: These "new" locks have survived a number of C drum dumps over the years. "A number," as in many, many. Tom lives for C-drum dumps. Always fun! David Link to comment Share on other sites More sharing options...
chipsaunders Posted May 25 Report Share Posted May 25 For what it's worth, I am shooting a WWII Savage with an AOC blish lock installed. I cleaned it today. Link to comment Share on other sites More sharing options...
Cipher032 Posted May 25 Author Report Share Posted May 25 (edited) Got to shoot the West Hurley today. Has anyone had issues with light primer strikes? Also had 1 instance of slam firing. Ammo was PMC Bronze 230 grain. When I fed the rounds that didn’t fire through my M1911, it didn’t have any issues shooting them. Edited May 25 by Cipher032 Link to comment Share on other sites More sharing options...
OldFalGuy Posted May 26 Report Share Posted May 26 Cipher- I do not know your age but I am 70. Many years ago I had a Colt 21 and a WH 28. I sent the WH to PK, waited 4 years as my understanding is he works on them one at a time. He blueprinted the receiver =replaced the interior with a Colt perfect rail setup. I never have to worry about the WH again-Ever. I understand ya just paid a bunch for it and do not want to send it off. Well good news ya don’t. Replace all parts with GI and hit the range-especially the mag latch. Then send it to PK. Mark Link to comment Share on other sites More sharing options...
Cipher032 Posted May 27 Author Report Share Posted May 27 Internals have already been GI upgraded. SFAIK, PK no longer does work on WH Thompsons. Link to comment Share on other sites More sharing options...
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