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Posted: 2/1/2017 3:27:40 PM EDT
[#1]
Most LIDs have a fixed "spacer" piston available for using the can with a fixed-mount barrel.
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Posted: 2/1/2017 3:41:59 PM EDT
[#2]
My Gemtech GM9 had 1/2-28 threads on the LID. My AR has 1/2-36. I bought the fixed adapter. It didn't go on far enough. Luckily I had a new HVT that came with a shim kit. The thickest shim is enough to cover the gap between the adapter and the thread shoulder.
So, buy the 1/2-36 adapter if that is the one you need and a Gemtech 1/2" shim kit. I still haven't had time to shoot it. 
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Posted: 2/1/2017 4:01:25 PM EDT
[#3]
I was swapping my Tirant back and forth last weekend between a CZ Scorpion and a 9mm Glock
Well after a few times swapping I forgot to pull the spacer and put the spring back in and the Glock kept failing. I was getting pissed until I took a deep breath and thought about what I was doing. Soooo glad I've got other cans coming to avoid this in the future 
But yes, throw a spacer in your LID and rock on |
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Posted: 2/1/2017 4:23:57 PM EDT
[#4]
Quote HistoryQuoted:
I was swapping my Tirant back and forth last weekend between a CZ Scorpion and a 9mm Glock Well after a few times swapping I forgot to pull the spacer and put the spring back in and the Glock kept failing. I was getting pissed until I took a deep breath and thought about what I was doing. Soooo glad I've got other cans coming to avoid this in the future
But yes, throw a spacer in your LID and rock on First world problems. 
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Posted: 2/1/2017 5:02:12 PM EDT
[#5]
Quote HistoryQuoted:
First world problems. 
I honestly need a 1/2x36 fixed mount made for my Thompson machine ISIS. My AR9 Faxon barrel is x36 and I'm not convinced on dropping the coin on a 3 lug |
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Posted: 2/1/2017 7:35:14 PM EDT
[#6]
Quoted:
I've got a Form 1 suppressor with a Gemtech LID. I built this for my Glock and it works quite well. I'd like to build a 9mm AR SBR and use the same can, but I've been told that I cannot use the LID without stripping the threads off the AR barrel. So I will need to remove the spring, or change the piston to a fixed design, or something. Looking for input on this. Thanks! You need either a Piston Blocking Tube- Link Or since the threads are the same on the LID as on the Fixed thread mounts you could go that route. They are here: Link You were told wrong. It won't strip the threads off the barrel. It may damage your can if you don't replace the spring though. Good Luck. |
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Posted: 2/16/2017 3:10:48 PM EDT
[#7]
There is some really good information in this thread. Thank you guys for helping me out. My AR barrel and Glock barrel use the same thread pitch so I was able to order a fixed barrel spacer. It hasn't come in yet, but I figure that I'll just swap out the spring for the spacer when I use the can on my AR.
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Posted: 2/19/2017 2:52:06 PM EDT
[#8]
Source for cheap spacer? SiCo @ $65 is a lot of $ for what it is.
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Posted: 2/19/2017 4:34:01 PM EDT
[#9]
Make one?
My AAC one was like $30 |
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Posted: 2/19/2017 6:30:37 PM EDT
[#10]
If your form 1 supressor fits a gemtech lid, it will also fit a "B" tube adaptor. They used to be available from SDTA, but I don't know if they are still selling them or not. The other option is for a fixed barrel spacer. Drawings for a gemtech fixed barrel spacer are available all over the net. If you can't find one, send me an IM and I will post one in this thread.
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Posted: 2/21/2017 6:41:45 AM EDT
[#11]
Quote HistoryQuoted:
Source for cheap spacer? SiCo @ $65 is a lot of $ for what it is. I believe the griffin spacer will fit and it's only $30 iirc Its really just a little piece of aluminum tube and doesn't have any holes like the SiCo spacer. I'm prety sure the holes in the SiCo spacer are just to save weight. I actually cut a piece of aluminum tube to use before I got my spacer from Griffin. I got the tube from the leg of one of those "walkers" that old people use |
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Posted: 2/21/2017 5:11:52 PM EDT
[#12]
This just came in today. It fits well and should work fine. It cost me about 10 bucks shipped. It's just a nicely finished aluminum spacer. Next time I'll just make my own.
 Attached File |
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Posted: 2/21/2017 5:12:12 PM EDT
[#13]
Double tap.
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