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Wanting to buy a scope mount

This is a discussion on Wanting to buy a scope mount within the Modern M14 forums, part of the M14 M1A Forum category; Originally Posted by Wasted ammo Originally Posted by Dindi13 Does it have to be a 12-32 machine screw?? And yea it doesn't feel like it's ...


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Old February 13th, 2017, 05:30 PM   #31
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Does it have to be a 12-32 machine screw??
And yea it doesn't feel like it's grabbing the threads in the receiver
Not sure what thread pattern, but yes it has to be the correct one!
There lies the problem. This screw/bolt is only made for this weapon... only thing I can do is order another bolt off the Internet

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Old February 13th, 2017, 05:42 PM   #32
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There lies the problem. This screw/bolt is only made for this weapon... only thing I can do is order another bolt off the Internet
The mount you chose is a lot more rugged than my Bassett. Bassett will sell you a bolt for about $5, it might be to long but it can be shortened. I know their threads match.

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Old February 13th, 2017, 06:31 PM   #33
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You really have to look at the threads in the receiver closely. Sometimes they may not be clean and sharp, that's why you have to run a screw from the inside out.

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Old February 20th, 2017, 07:02 AM   #34
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Okay so I may just run with a full rail system then and not worry about the screw

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Old February 20th, 2017, 07:35 AM   #35
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I thought I had the same issue when I first tried to install mine, then I cleaned and chased the threads on the receiver and all was well. Take your time and follow the directions and you should be fine.

Another note on torqueing to watch for (80-100 inch-pounds), any time using a liquid substance on threads is called "Wet Torqueing", and it can increase the value as much as 20%, some suggest letting the Blue Loctite dry overnight or a day or two, start at the low torque end or under, get a feel and let the wrench do the work, if it doesn't feel like it's stripping increase 5 inch pounds at a time, most torque wrenches are +/- 4% of accuracy, so 90-95 should be the limit.

Keep in mind this mount was designed for an M14 forged receiver, so, you don't want to go ape tight on a commercial one...

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Old February 20th, 2017, 01:35 PM   #36
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I thought I had the same issue when I first tried to install mine, then I cleaned and chased the threads on the receiver and all was well. Take your time and follow the directions and you should be fine.

Another note on torqueing to watch for (80-100 inch-pounds), any time using a liquid substance on threads is called "Wet Torqueing", and it can increase the value as much as 20%, some suggest letting the Blue Loctite dry overnight or a day or two, start at the low torque end or under, get a feel and let the wrench do the work, if it doesn't feel like it's stripping increase 5 inch pounds at a time, most torque wrenches are +/- 4% of accuracy, so 90-95 should be the limit.

Keep in mind this mount was designed for an M14 forged receiver, so, you don't want to go ape tight on a commercial one...

How do you go about cleaning the threads on the receiver? I'm very new to the M1A game.

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Old February 21st, 2017, 05:17 AM   #37
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How do you go about cleaning the threads on the receiver? I'm very new to the M1A game.
I used a Q-tip & alcohol, you'd be surprised at how much crude was in the threads as that area rarely got attention otherwise. Also I took my time and was patient with bolting the mount up to the receiver by hand until the threads caught, then continued by hand with a socket & extension to chase the threads until smooth, cleaned them again, assemble as above & per directions.

The key is moderation & patience as these are fine threads, don't force anything if it doesn't feel right...

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Old February 22nd, 2017, 06:03 AM   #38
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I got you. I may end up going with a handguard/rail system. Really want the Socom II rail if I can find one

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Old March 7th, 2017, 04:18 PM   #39
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Hey everyone,
I have a SAI scout squad. I just got a vortex viper pst with an American Defence recon mount. I am looking at the ARMS #18 mount because I like the low profile of the mount. Can anyone tell me pros and cons of this mount as well as any other low profile mounts that are avaliable?

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Heard expended rounds would jam in the creavace

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Old March 7th, 2017, 08:43 PM   #40
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I believe Sadalk makes or sells the tap for the hole in the receiver.

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Old March 9th, 2017, 04:22 PM   #41
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Thank you. I went with a vltor rail system... no issues

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