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Just Picked Up 1928 Wh Thompson


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#1 RonO

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Posted 24 November 2005 - 04:31 PM

First, the description, it's a West Hurley 1928 config with compensator, serial # 3XX range indicating 1977 manufacture, I think. All parts have been swaped with a 1942 manufacture Savage parts kit. The Bridgeport Conn "L" drum, has mismatched front and back.



1) The rear sight is marked under the ladder "Made by Lyman Middlefield Conn.U.S.A." Is this a repro or real Lyman sight?

2) It runs perfect with 20 and 30 round stick mags, but failes to pick up a round from the Bridgeport Conn drum 2 or 3 times in 50. Is this a gun problem or a drum problem?

Edited by RonO, 24 November 2005 - 04:37 PM.

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#2 TD.

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Posted 24 November 2005 - 07:17 PM

If the base is marked like this,

user posted image

it is an original Lyman Rear Sight. Congratulations on your early West Hurley Thompson. Consider yourself lucky to get one with a Lyman Rear Sight; the West Hurley produced adjustable rear sights are really junk.

I don't know about the drum feeding problems. I suggest finding someone with a 21/28 type Thompson and let them try your drum. Or find someone with a drum that will let you try it in your Thompson.

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#3 TSMGguy

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Posted 26 November 2005 - 10:35 AM

Congratulations on the acquisition!

Your back sight is an original Lyman, and would be correct for all but the latest WWII M1928A1s. Some early WH guns had these factory installed. Bluing is the correct original finish, with the "ladder" (the part with the range markings) left bright.

Most WH guns require at least some tuning to function properly, so it's hard to know whether you have a gun or a drum problem. WH guns are nortorious for improper dimensioning in the feed ramp area, and some of the machineing operations on Colt and GI guns were omitted elsewhere for economy of production. Fortunately, the steels used at WH were good, so your gun will stand up to normal use just fine. Some guns run right out of the box and others won't fire more than a couple of rounds. All WH guns, though, will benefit from some expert attention. Many owners send their guns off for this work before they have owned them for very long. Has any work other than parts switching been done to the gun that you know of?

I would not take your gun to anyone without extensive Thompson experience, as they could easily do more harm than good.

Make sure your drum is properly wound to 9 clicks, or if your gun seems to have a very high cyclic rate, try the full 11 clicks.

There's a good chance as well that the rotor in your drum hasn't been properly greased since 1940, and there are members of the board who can provide this service. Using a special fitting, grease is forced into the proper places. It's not a job that you can easily do yourself. Once done, the drum is good to go for years!

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#4 full auto 45

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Posted 26 November 2005 - 04:08 PM

I have a early Hurley, 587A, and the only part that wasn't GI was the buffer pilot. Check it and if it has the "S" or some other mark, yourgood to go. If not, swap it out for a GI one. The WH WILL come apart on you when you least expect it.
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