opsoff1 Posted January 9, 2018 Report Share Posted January 9, 2018 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 Link to comment Share on other sites More sharing options...
Scrambles Posted January 9, 2018 Report Share Posted January 9, 2018 (edited) Doug Richardson has Rivets. www.thompsonsmg.com310-457-6400 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 January 9, 2018 by Scrambles Link to comment Share on other sites More sharing options...
TD. Posted January 9, 2018 Report Share Posted January 9, 2018 I believe Board Members reconbob (Philidephia Ordnance) and PK. (Diamond K) have reproduction grip mounts that are manufactured to proper GI specification. Link to comment Share on other sites More sharing options...
ron_brock Posted January 9, 2018 Report Share Posted January 9, 2018 (edited) 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 January 9, 2018 by ron_brock Link to comment Share on other sites More sharing options...
deerslayer Posted January 10, 2018 Report Share Posted January 10, 2018 Bobs got rivets too! Link to comment Share on other sites More sharing options...
Adg105200 Posted January 10, 2018 Report Share Posted January 10, 2018 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 Link to comment Share on other sites More sharing options...
Paladin601 Posted January 10, 2018 Report Share Posted January 10, 2018 (edited) Deleted, redundant Edited January 10, 2018 by Paladin601 Link to comment Share on other sites More sharing options...
opsoff1 Posted January 10, 2018 Author Report Share Posted January 10, 2018 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 Link to comment Share on other sites More sharing options...
opsoff1 Posted January 10, 2018 Author Report Share Posted January 10, 2018 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 Link to comment Share on other sites More sharing options...
ron_brock Posted January 10, 2018 Report Share Posted January 10, 2018 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. ScottMakes sense. Yes I believe someone else on the board has a similar setup, if I recall correctly. Ron Link to comment Share on other sites More sharing options...
Adg105200 Posted January 10, 2018 Report Share Posted January 10, 2018 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 Link to comment Share on other sites More sharing options...
Paladin601 Posted January 10, 2018 Report Share Posted January 10, 2018 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 Link to comment Share on other sites More sharing options...
opsoff1 Posted January 10, 2018 Author Report Share Posted January 10, 2018 Paladin,Great idea! - anyone? Broken tab grip mounts for sale? Link to comment Share on other sites More sharing options...
ron_brock Posted January 10, 2018 Report Share Posted January 10, 2018 The tab is of no use if youre going to modify it to slip by the barrel. The set screw would be needed to retain the grip mount into the receiver channel. Ron Link to comment Share on other sites More sharing options...
opsoff1 Posted January 10, 2018 Author Report Share Posted January 10, 2018 I'm tracking - looking to mod the tab as more of a filler / aesthetic. Link to comment Share on other sites More sharing options...
Adg105200 Posted January 10, 2018 Report Share Posted January 10, 2018 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 Link to comment Share on other sites More sharing options...
opsoff1 Posted January 10, 2018 Author Report Share Posted January 10, 2018 AndrewEmail inbound. Scott Link to comment Share on other sites More sharing options...
Paladin601 Posted January 10, 2018 Report Share Posted January 10, 2018 Paladin,Great idea! - anyone? Broken tab grip mounts for sale?I will look and see if I have one Link to comment Share on other sites More sharing options...
Piep Posted January 10, 2018 Report Share Posted January 10, 2018 Doug Richardson has already produced this type of grip mount.Contact him for more details. Link to comment Share on other sites More sharing options...
reconbob Posted January 11, 2018 Report Share Posted January 11, 2018 The guy on Gunbroker and Don Bell at Omega have new grip mountsand as mentioned they are not bent to flex tightly against the barrel wheninstalled. They appear to be case hardened and you would not be able totap/thread them. I used some of them on the blank guns and we have todrill 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, sndhardened but they are all gone. A very time consuming and difficultpart to make. Bob Link to comment Share on other sites More sharing options...
richard w. Posted January 11, 2018 Report Share Posted January 11, 2018 All those ruined grip mounts from the disassembled Thompsons... That guy with the hammer has a lot to answer for. Link to comment Share on other sites More sharing options...
Paladin601 Posted January 11, 2018 Report Share Posted January 11, 2018 The guy on Gunbroker and Don Bell at Omega have new grip mountsand as mentioned they are not bent to flex tightly against the barrel wheninstalled. They appear to be case hardened and you would not be able totap/thread them. I used some of them on the blank guns and we have todrill 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 againyou have to anneal the end where you plan to fit it to the receiver.I made 2 batches of grip mounts properly machined, bent, sndhardened but they are all gone. A very time consuming and difficultpart to make. BobThere is always the 3d printer Link to comment Share on other sites More sharing options...
Scrambles Posted January 12, 2018 Report Share Posted January 12, 2018 Bob, You should make another run if you are all sold out, and they are in demand. It sounds like you did a better job than anyone in a very long time. Next time run a larger batch, and charge a higher price. Make it worth your time. Take care Link to comment Share on other sites More sharing options...
reconbob Posted January 12, 2018 Report Share Posted January 12, 2018 Unfortunately I do not see making grip mounts any time soon. It is a very difficultpart to make - a 3/4" square bar gets 75% machined away. The piece has to be stressrelieved before machining, and hardened and blued after machining. Now here is the big problem - for 75 years Thompson parts have been sold at afraction of what it would cost to make them today. The "going rate" for an original gripmount I would say is $125, if you can find one. Thats what people expect to pay and ifyou try to sell a new manufacture one for $125 people will reject it and say "why shouldI by a repro for $125 when I can get an original for $125?" Try to make it truly worth whileand 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 highthat 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 measureOK and work OK but they look like hell because they were made on modern 4 and 5 axismachines where surfaces are made by many small passes of a tool so you can use thesame tool for many operations. The bolt head and web where the head joins the bodyis not turned on a lathe and there are many lines or striations causing a rippled finishwhich 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 beforehardening and so will not flex tightly against the barrel. Just the type of important detailthat gets overlooked when the person making the part is not intimately familiar with thepart. 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 thinkyou can make a living being a Thompson "guy". A profitable hobby - yes, but a good solidliving - no. I don't know that any young guys are getting in to it and the old establishedguys are moving farther down the trail. Bob Link to comment Share on other sites More sharing options...
ppgcowboy Posted January 12, 2018 Report Share Posted January 12, 2018 Who made rivited grip mounts? Link to comment Share on other sites More sharing options...
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