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WTB / WTT - Grip Mount & Rivets


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So, apologies up front if this is redundant or shows a lack of awareness.

 

I have Googled, Yahoo's, Egayed and Binged and used every other tool I can think of to include searching all the archived / pinned threads.

I see from years back that there was a serious lack of grip mounts available. (GI 1/2")

 

It appears that this problem is still present.

 

What I would love to be able to find is a repro grip mount or a GI one - appearance isn't an issue - as long as it is dimensionally ok.

The project is to do a little R&D on a simplified method to be able to remove the mount without pulling the bbl.

 

I am open to input and comment as I have seen through many threads different mentions of modifications along these lines.

 

Second issue - looking to trade - I have an AOC marked grip mount - looking for an S marked version. Mine is in decent shape - looking for the same.

 

Last - rear sight rivets - best option to get them relatively soon?

 

 

Thanks in advance.

 

Scott

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Doug Richardson has Rivets.

 

www.thompsonsmg.com

310-457-6400

 

Waffenmeisters has grip mounts, new made.

Although they are not bent the 0.100 upwards against the barrel as per the original design.

They seem to be a harder steel, and are ~$70 advertised on GB. He is also one of the few to still have butt stock hardware for sale.

 

Use: wicopesset@gmail.com

Edited by Scrambles
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I believe Board Members reconbob (Philidephia Ordnance) and PK. (Diamond K) have reproduction grip mounts that are manufactured to proper GI specification.

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Scott,

 

Im curious how you would remove the grip mount without removing barrel on an un-modified grip mount. Wont the tab cause some issues?

 

As mentioned, reconbob made grip mounts due to the serious lack of availability. Theyve dried up for the moment.

 

Ron

Edited by ron_brock
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http://waffenmeisters.com/index.php?route=product/product&product_id=254&search=Thompson&description=true

 

Waffenmiester as mentioned (link above) as far as a S marked original, are you looking for Stevens or Savage? I have a Stevens (squared S) one I would trade- bent type.

 

Andrew

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Ron,

My intention was to mill the tab with the same radius as the bbl OD, just enough so that it clears the bbl with the remaining tab still engaged in the slot.

The mount would be "cleaned up" a bit for fitting into the T slot of the receiver where it could be tapped out against a very slight interference fit.

Retention would be accomplished via a set screw through the grip mount that would contact the inside flat of the T slot. There may be a need for a small relief pocket for the set screw to seat into on the recvr.

If the grip mounts is hardened in the area for the screw - that can be spot annealed.

 

I would prefer to try this on a repro mount, not anything original.

From my perspective - it seems so simple that I would imagine that countless others have tried this the same way - open to any comment of feed back on the pros/cons of a mod like this.

 

Scott

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Andrew,

I would defer to the more knowledgeable - wouldn't either Savage or Stevens be correct on a Savage produced 28A1? (late production).

To that end - I would certainly be open to trading.

Thank you for the offer.

 

I guess we can work out details over PM?

 

Scott

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Ron,

My intention was to mill the tab with the same radius as the bbl OD, just enough so that it clears the bbl with the remaining tab still engaged in the slot.

The mount would be "cleaned up" a bit for fitting into the T slot of the receiver where it could be tapped out against a very slight interference fit.

Retention would be accomplished via a set screw through the grip mount that would contact the inside flat of the T slot. There may be a need for a small relief pocket for the set screw to seat into on the recvr.

If the grip mounts is hardened in the area for the screw - that can be spot annealed.

 

I would prefer to try this on a repro mount, not anything original.

From my perspective - it seems so simple that I would imagine that countless others have tried this the same way - open to any comment of feed back on the pros/cons of a mod like this.

 

Scott

Makes sense. Yes I believe someone else on the board has a similar setup, if I recall correctly.

 

Ron

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Andrew,

I would defer to the more knowledgeable - wouldn't either Savage or Stevens be correct on a Savage produced 28A1? (late production).

To that end - I would certainly be open to trading.

Thank you for the offer.

 

I guess we can work out details over PM?

 

Scott

Either is correct. I just know some people here are searching for Savage marked ones which seem to be hard to find.

 

PM sent.

 

Andrew

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Ron,

My intention was to mill the tab with the same radius as the bbl OD, just enough so that it clears the bbl with the remaining tab still engaged in the slot.

The mount would be "cleaned up" a bit for fitting into the T slot of the receiver where it could be tapped out against a very slight interference fit.

Retention would be accomplished via a set screw through the grip mount that would contact the inside flat of the T slot. There may be a need for a small relief pocket for the set screw to seat into on the recvr.

If the grip mounts is hardened in the area for the screw - that can be spot annealed.

 

I would prefer to try this on a repro mount, not anything original.

From my perspective - it seems so simple that I would imagine that countless others have tried this the same way - open to any comment of feed back on the pros/cons of a mod like this.

 

Scott

 

 

why don't you get one with a broken tab, and add a new tab to fit. Cheaper, and you have not ruined a good grip hanger

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Paladin,

Great idea! - anyone? Broken tab grip mounts for sale?

Actually, I do have a few grip mount bars with broken tabs as well and was going to mention it lol.

 

Andrew

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The guy on Gunbroker and Don Bell at Omega have new grip mounts

and as mentioned they are not bent to flex tightly against the barrel when

installed. They appear to be case hardened and you would not be able to

tap/thread them. I used some of them on the blank guns and we have to

drill them for a weld pin and we had to use a tunsten carbide drill.

To be able to tap you would first have to anneal.

Original G.I. gripmounts are even harder all the way thru so again

you have to anneal the end where you plan to fit it to the receiver.

I made 2 batches of grip mounts properly machined, bent, snd

hardened but they are all gone. A very time consuming and difficult

part to make.

 

Bob

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The guy on Gunbroker and Don Bell at Omega have new grip mounts

and as mentioned they are not bent to flex tightly against the barrel when

installed. They appear to be case hardened and you would not be able to

tap/thread them. I used some of them on the blank guns and we have to

drill them for a weld pin and we had to use a tunsten carbide drill.

To be able to tap you would first have to anneal.

Original G.I. gripmounts are even harder all the way thru so again

you have to anneal the end where you plan to fit it to the receiver.

I made 2 batches of grip mounts properly machined, bent, snd

hardened but they are all gone. A very time consuming and difficult

part to make.

 

Bob

There is always the 3d printer :)

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Unfortunately I do not see making grip mounts any time soon. It is a very difficult

part to make - a 3/4" square bar gets 75% machined away. The piece has to be stress

relieved before machining, and hardened and blued after machining.

Now here is the big problem - for 75 years Thompson parts have been sold at a

fraction of what it would cost to make them today. The "going rate" for an original grip

mount I would say is $125, if you can find one. Thats what people expect to pay and if

you try to sell a new manufacture one for $125 people will reject it and say "why should

I by a repro for $125 when I can get an original for $125?" Try to make it truly worth while

and profitable and sell it for more and you are now ripping people off.

This dilemna will stay in place until the price of Thompson parts becomes so high

that it will become truly profitable to make them. But who is really going to do this?

Making gun parts is an art. I just had some bolts made for the blank gun and they measure

OK and work OK but they look like hell because they were made on modern 4 and 5 axis

machines where surfaces are made by many small passes of a tool so you can use the

same tool for many operations. The bolt head and web where the head joins the body

is not turned on a lathe and there are many lines or striations causing a rippled finish

which looks nothing at all like a Thompson bolt. But this is the new normal.

The grip mounts sold on GB and by Omega are OK but they are not bent before

hardening and so will not flex tightly against the barrel. Just the type of important detail

that gets overlooked when the person making the part is not intimately familiar with the

part.

I don't think the Thompson hobby and collecting will ever go away. It is an American

icon like Mickey Mouse, The New York Yankees, Harley Davidson, etc. But I don't think

you can make a living being a Thompson "guy". A profitable hobby - yes, but a good solid

living - no. I don't know that any young guys are getting in to it and the old established

guys are moving farther down the trail.

 

Bob

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