Smith Enterprise SEI Socom 16 gas lock installation problem - M14 Forum

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Smith Enterprise SEI Socom 16 gas lock installation problem

This is a discussion on Smith Enterprise SEI Socom 16 gas lock installation problem within the Modern M14 forums, part of the M14 M1A Forum category; Good morning all. I bought a new Smith Enterprise SEI Socom 16 gas lock to fit my new Springfield Armory Socom 16 muzzle. I installed ...


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Old February 17th, 2017, 06:24 AM   #1
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Smith Enterprise SEI Socom 16 gas lock installation problem

Good morning all.

I bought a new Smith Enterprise SEI Socom 16 gas lock to fit my new Springfield Armory Socom 16 muzzle.

I installed it but I met two problems.

Firts of all the gas lock wrench I had bought in the past at Brownells could hardly fit the new Smith Ent. part.
I had to use a rubber mallet to get the wrench working and, since it's in alloy, it scratched the new gas lock sides.
The same wrench is perfectly fitting the original Springfield Armory gas lock instead.

Secondly it took me a lot of effort to thread it over the the muzzle. I had to use lots of oil and to thread in it one turn clockwise and half turn counter clockwise and I got the impression that it was like the new gas lock was tapping a new thread.

Finally I could thread it in all but I'm sure it will hard to unthread it again for maintenance.

The question is: are Smith Enterprise parts all like that which I think are out of Mil-Spec size or maybe I received a faulty part instead ?
The original Springfield Armory gas lock can be threaded in just using two fingers without effort.

Thank you in advance.








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Old February 17th, 2017, 07:39 AM   #2
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If the wrench is the BAD T3, it may not work on SEI parts, the T4 is the proper tool.

SEI parts are a lot more likely to be milspec than current SAI.

The gas lock should be able to go on with just finger pressure. Many tools are designed to hold the cylinder, not the lock.

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Old February 17th, 2017, 07:44 AM   #3
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Thanks for your answer.

I learn now that SA barrel thread is out of spec then.
As I said I had to force a lot to thread the gas lock in till the end, I hope I didn't make any damage ...

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Old February 17th, 2017, 08:07 AM   #4
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see thread below with info on obtaining dies for both front barrel threads
M14 barrel thread sizes (muzzle and gas lock)

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Old February 17th, 2017, 08:13 AM   #5
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Thanks POLACK

Unfortunately I live in Italy and I am out of reach from all that hardware.

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Old February 17th, 2017, 08:59 AM   #6
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dies are a non itar item. order them in case you ding up a thread,or a friends

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Old February 17th, 2017, 10:44 AM   #7
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Smith Enterprise SEI Socom 16 gas lock installation problem

I removed the gas lock.
I think threads are both the same pitch but just a little bit out of tolerance. So maybe no need at all of dies to tap the muzzle.
When I threaded in the gas lock for the second time it was still a bit hard and needed to use the tool again but it was much easier than the first time.

I also found this description at one seller website

"This part is machined to exacting tolerances in order to fit very tightly and securely on your SOCOM-16 for the ultimate rock solid assembly. Thread length is .735."

http://www.nokick.com/SOCOM_16_Threa...ei-2001-gl.htm

Thanks again.

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Old February 18th, 2017, 05:31 AM   #8
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I was able to install mine and snug it tight just using my hands. I wonder if you had some threads that should have been cleaned up prior to installing

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Old February 18th, 2017, 12:59 PM   #9
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I had a similar issue. My first Socom barrel threaded the SEI part on easily. SA rebarreled it and it was a total to put the gas lock back on. It felt exactly as you described, almost like I was chasing bad threads. Not threading it, just chasing. I spent a half hour threading it on, backing off, wiping it down, and reinstalling. Slides on and off now without a hitch.

Could be poor tolerances on the SA barrel threads and park. It's all conjecture without measuring. :) But you are not alone! I'd just leave it be at this point.

You shouldn't need to remove it often- the only thing that gets yanked is the plug.

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Old February 18th, 2017, 01:44 PM   #10
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Bizio: I have that same part number SEI item on my SOCOM and it went on without any difficulty, so they can work. I do not recall any resistance problem and it timed properly with the use of shims and maintains a near perfect alignment of the gas port and cylinder vent. No tool or force was necessary for my installation. I'm hoping that you just are having some bad luck with the mating of your particular gas lock and your particular barrel. I do like mine as it allows for standard height font sights with std. or N.M. blade widths. Best wishes to you for a successful assemblage.

There are pictures of the SEI SOCOM gas lock and SOCOM gas plug on this thread:

Socom Gas Lock

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