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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; It doesn't take much for the lugs to not fit the grooves. If one is out of position .005 one way and the other is ...


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Old February 9th, 2017, 05:17 PM   #16
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It doesn't take much for the lugs to not fit the grooves. If one is out of position .005 one way and the other is out .005 the other, it just won't fit. Same with the width; if the lugs are .005 wider than the design specs of the groove they won't seat. If the lugs are .005 thinner than the design specs there will be slop. If the widths are both off in opposing directions the fit becomes worse. This is the primary reason some mounts don't fit some receivers.

If only a mount were designed to have grooves to match the receiver grooves, both being filled with a glass bedding or some type of epoxy/resin mix, the fit would be perfect for any receiver, and repeatable.

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Old February 10th, 2017, 06:47 AM   #17
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Yes that's the complaint that I have seen a good bit on the Internet. Most say that they filed a little and it worked perfectly.
I personally like the look of the ARMS mount better and after getting my scope and rings with the estimate height of the mount I should be perfect with the cheek rest I have installed.
Also just like the man said below I looks like it belongs there where as other mounts look very awkward to me.

Thanks for the comments yall.

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Old February 11th, 2017, 12:32 PM   #18
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Well I got the mount in today... having trouble with it

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Old February 12th, 2017, 10:12 AM   #19
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Well I got the mount in today... having trouble with it
Which mount did you end up buying?

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Old February 12th, 2017, 10:54 AM   #20
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ARMS #18. The anchor screw/bolt does not seem long enough... I cannot find another 12-32 bolt

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Old February 12th, 2017, 12:40 PM   #21
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The horizontal grove in my Socom 16 wasn't machined wide enough. Sounds like you may possibly have the same problem. I'd sell the Arms 18 and have Sadlak fit one to your receiver. They will send you a fitting kit that you use to take some measurements that you will give them so they can adjust a mount for your receiver. Mine was so off that they asked me to double check my measurements because they seemed way off but I gave them the same numbers the second time around. The custom fit they did made my mount fit like a glove. I still have the Arms 18 in my parts box.

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Old February 12th, 2017, 12:59 PM   #22
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I use a steel Gen 4 SA mount and have had no issues, it gets shot weekly, take bad reviews of most mounts with a grain of salt too, follow your mounting instructions and don't be shy about using locktite on your mounting fasteners.

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Old February 13th, 2017, 03:22 AM   #23
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ARMS #18. The anchor screw/bolt does not seem long enough... I cannot find another 12-32 bolt
You don't want it to poke thru into the path of the bolt. Just full threads and torque with blue loctite. Main thing is to make sure the channel tabs are set and the rear pad touches the dovetail solid. Torque the dovetail down then bring the front pad down til it touches the receiver and turn 1/8 more.

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Old February 13th, 2017, 07:39 AM   #24
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I understand that. I think the bolt isn't grabbing on the threads all the way. I start to tighten it down and then it just pops back loose. I do not belive it is stripped but it could be.

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Old February 13th, 2017, 07:42 AM   #25
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From what it looks and feels like, the location of the hole where the bolt goes in the mount itself is to wide/thick so the bolt will not reach and/or grab the threads on the receiver.

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Old February 13th, 2017, 07:43 AM   #26
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Other than the bolt does the mount fit tight against the receiver? In other words does it line up right?

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Old February 13th, 2017, 11:16 AM   #27
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Try screwing the bolt in without the mount. You may have to run a machine screw from the inside out to clean the threads in the receiver.

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Old February 13th, 2017, 05:16 PM   #28
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Yes it fits almost perfect besides the screw up front for the elevation adjustment. Had to sand down some of the front hand guard

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Old February 13th, 2017, 05:17 PM   #29
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Try screwing the bolt in without the mount. You may have to run a machine screw from the inside out to clean the threads in the receiver.
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

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Old February 13th, 2017, 05:25 PM   #30
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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!

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