tbirdsc

Just occurred to me now - the barrel is probably not threaded as you would see the thread run out

Hi All I just picked up this A-O Thompson M1 manufactured in 1999 and I am trying to figure out how the front sight is mounted/attached. As you can see from the attached pic, it is not pinned in place. I contacted A-O about it and sent them the same pic, as far as they knew, all front M1 sights are now and always have been pinned in place so no help there. So was the front sight threaded at that time like the Cutts and lock-tited in place or is it not threaded and just a slip fit and lock-tited in place. It seems to me that the adhesion would be better using a threaded barrel vs a smooth barrel if that is the case. As usual, thanks to all for your help

Not sure if I am following you but does not the serial number of the lower accomplish that goal or are you talking about using a 80% lower?

I believe there was also talk of a substantial increase the cost of the tax stamp too. That is another reason why I am thinking of getting the process going just to have all the bases covered in that arena.

You are correct and that is why it is a hypothetical question and maybe the "confiscation" part should be removed and my question only relating to a ban like the 94 ban or a buy back program. If it comes to confiscation situation, all bets are off. And to your point, all NFA items are registered.

Hi All Since this forum has quite a few members who are really up to speed on the NFA/BATF, I have a hypothetical SBR situation. I hope I am able to articulate myself so that my question is clear. If the day would come that the semi-auto AR15 platform would be subject to being banned or a buy back or a confiscation situation (and only God knows the mess that would come with it), would a semi-auto AR15 with a 14.5 barrel that has gone thru the year long SBR process and is approved and tax stamp paid be exempt from any of the above scenarios because it is a NFA approved SBR? Thanks

OK - thanks I misread the Numrich description on the forends with the 3/4 slot as NOS for USGI when it was NOS for WH units hence the question about the width on M1 grip bars - just been over absorbed on all the info I have been researching.

Also - was the grip mount bar always 1/2", I would have thought of leaving the bar 3/4" wide and eliminating the machining to step down to 1/2" would have been part of the cost cutting efforts done on the M1/M1A1?

Thanks again So are the WH/Kahr 10.5/SBR barrels GI spec or just a shortened version of their 16 barrels

Hi All Thanks for the info I have been slowly but surely going thru all the posts - I wish I would have started this project when we had two feed of snow on the ground. I have one more question before I start pondering which direction to go with the mods while my paperwork is being processed. On the horizontal forend - just by looking at the smooth and finned barrels profiles on pictures - it looks like the finned barrels are a larger diameter - so are the forends milled for the smooth barrels and need to be altered for for the finned barrels or are they milled for the finned barrels and then there is a gap for the smooth barrels? Thanks again

Hello All, I am a new member just joining yesterday and this is my first post. I am mostly a WWII 1911A1 guy so this is my first venture out of that realm so I am pretty green when it comes to the Thompson. I am in the process of obtaining a 1988 WH 1927A1 upon which I plan on going the SBR route. I always thought if I was going to go thru all the SBR paperwork, a S/A Thompson would be it so I decided to go for it. After the 1911, the Thompson is my second favorite WWII firearm. With that being said, I have few questions after poring through this forum posts and the web in general. It is my understanding that the closer the WH unit is to the original date of introduction (1975), the greater the chance of it having some USGI parts, furniture and such and the fire control may or may not be modified USGI part- but in a nut shell since my unit is dated to 1988 – use Kahr parts for the fire control group and USGI may be used for the rest if desired or needed? I plan on going with the finned 10.5 barrel and again after poking around on this forum and the web, I am confused on the horizontal foregrip fit. I was assuming they are all the same except for the mounting bar width. However, Numrich lists three foregrips each with a different p/n for a 3/4 inch wide bar alone so I am not so sure now. Are there different forends? – As for the forend width, I have seen USGI surplus units on Gunbroker in both 1/2 or 3/4 inch width? Is the width a manufacturer option or was it a date driven revision. I have noticed that sometimes the Cutts is not pinned – a manufacturing cost issue I assume. What was the logic for not having the mag catch in the USGI position on the WH and Kahr units other than have to use their mags if you did now want to modify USGI mags?Thanks in advance for all the help and I already found tons of info so thanks to all who has posted before. Jim