Note on ARMS #18 mount

scrubfox

scrubfox

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So, i ordered a mount from P+D(great, fast service). Go it today(very excited) and following all the instructions with great care put her on the Norinco.....HUM....somethings not right. The mount was nowhere NEAR strait in relation to the barrel! I guesstimate the scope would have to be adjusted to the right by 10-15ft. at 100 yrds!

So i'm thinking great, i'll have to pack it up and send it back. But something tells me to check the stickies here on mounting a scope on the m14. Sure enough, some external dimensions on some commercial m14's are a little excessive for the ARMS #18. The sticky suggests judiciously removing a little metal from the inside front curve to give clearance for the reciever.

So, I take the mount off, flip it upside down and sure enough, i could see exactly where it was making contact on both the mount and receiver(both mount finish and parkerizing on receiver). So, tommorro i'm going to get the dremmel out and see what happens.

Just thought i would let everyone know in case others run into the problem or have already gone to the range and have maxed their windage out on their scopes.So moral of the story, READ THE STICKIES! And thanks to those who put in the time to put them there!

Cheers,

Pete.

P.S.

I'll post tomorrow after the dreaded dremmel.
 
don't dremel. Go really slow. you don't have to remove much.

Go an get a really fine grinding wheel that is about the diameter of the receiver, and remove metal from the mount by hand. Ideally do this at the range. on shoot off grind.
 
Not something I would have expected from an ARMS mount, considering the $$$... Mine is in the mail to me, hope it's ok...

Cheers
Jay
 
not sure if i have the same problem, I have the scope mount (sadlak) installed no problem but when I pre-sight with a boresighter my windage has to be maxed out in order to have the red dot in the center, not much free space there!

if my boresighter isn't wrong, I'll be out of windage and always hit to the left


At first I had a doubt my barrel was misindexed, now I just have no clue
 
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If you are using one of those in-the-chamber case style laser boresighters I would be suspisious as in my experience the force of the ejector will skew the boresighter case sideways sufficient to make you think there is a massive problem when in reality things are lined up not too bad.

Brobee
 
had similar issue with mine on my stag. I had to move the sight almost completely to the right to hit to even hit the paper
 
im using a bushnell insert type and any way I insert it and no matter how many tiems I tried, always the same results, I feel my mount is pointing a bit to the right compared to the barrel
 
the first time in installed an ARMS to a norc i experienced these same issues.
I ended up loosening the top front pressure pad all the way.... in fact i no longer even utilize that funtion of my mount. I had a bugger of a time getting it lined up.
In the end it was my installation procedure and NOT the mount or receiver.

not saying you guys are having the same issue i had.... but go over the mounting procedures again, check that the front pad is making no contact during the installation. loosely install screw and stripper clip bar to the mount, slide mount onto rifle and hand tighten the side bolt. Take your norinco combo tool and use the hex head opening on the end to tighten the side bolt on your mount. Tighten till it's snug but do not go reefing on it. A longer handled tool is not needed for more leverage. I use no locktite and have never shot her loose. Once side bolt is tool snug tighten up the stripper clip area.
note*** if the lock ring behind the stripper clip screw is too tght..... this will throw off windage and if the front pressure pad is touching the receiver during mounting.... this will throw off windage.


your mileage may vary.... as the saying goes
 
I have the same problems with the arms mount,and its not just on my norinco it is also happening with my M1A,and I followed the same steps as stated by 45 acpking,used a bushnell arbber boresighter,with which I have mounted dozens of scopes on bolt actions,
I use up all the windage in the scope and I am still 3in to left.bad mounts are 3 bad rifles?
 
O.K. i took off just enough with the dremmel maybe 15 thousand in the corner of the mount and that definitely is what it was. Its staight as an arrow now. So my receiver must have been just a little too big externally. Mount is rock solid.

Sorry all i have is a 35mm camera so no pics for now!

Now, the medium rings i had hoped :redface::rolleyes:to use are too low for the 50mm V9 weaver scope !

Geeze, there is always something.:p
 
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scrubfox said:
O.K. i took off just enough with the dremmel maybe 15 thousand in the corner of the mount and that definitely is what it was. Its staight as an arrow now. So my receiver must have been just a little too big externally. Mount is rock solid.

Sorry all i have is a 35mm camera so no pics for now!

Now, the medium rings i had hoped :redface::rolleyes:to use are too low for the 50mm V9 weaver scope !

Geeze, there is always something.:p
Click to expand...

The proper way to mount an ARMS 18, I own 3 of them and the same applied with all three...

- Disassemble the rifle leaving the bare bones barreled receiver, no bolt, op rod, guide rod and no scope on the mount.

- Install the mount and simply check that everything is relatively aligned and all bolts are snugged up.

- If this is a new mount you would most likely notice that the mount is not fully seated into the receiver grooves. The mount may be slightly protruding more at one end than the other or the mount may not be perfectly flush. The mount must be fully seated and completely flush with the receiver if it is properly mated.

- If the mount is not seated fully into the receiver grooves, with the mount still attached, unloosen the bolt that goes into the stripper clip guide set the receiver on a wood block then take a 1 1/2 lb dead blow hammer and pound the mount on the three points where it mates into the receiver grooves with medium force. You will notice the mount seating deeper into the receiver grooves, now snug up the main receiver mounting bolt and repeat until all three points of the mount is seated completely and evenly into the receiver grooves. Check for flushness all the way around.

If you have done a proper job the mount will align perfectly with the bore axis.

Do not remove material from the mount unless of course your middle name is Bubba.;)
 
The action i took was definitely the correct action for my specific problem. You could see exactly were the front underside(were the mount starts to curve) was rubbing the receiver. Even ARMS acknowledges that SOME receivers are not machined enough on the upper front left exterior.

The machined eccentrics of the mount were only making contact at the rear horizontal grooves no matter how many times i followed the instructions to the letter.
 
45ACPKING said:
the first time in installed an ARMS to a norc i experienced these same issues.
I ended up loosening the top front pressure pad all the way.... in fact i no longer even utilize that funtion of my mount. I had a bugger of a time getting it lined up.
In the end it was my installation procedure and NOT the mount or receiver.

not saying you guys are having the same issue i had.... but go over the mounting procedures again, check that the front pad is making no contact during the installation. loosely install screw and stripper clip bar to the mount, slide mount onto rifle and hand tighten the side bolt. Take your norinco combo tool and use the hex head opening on the end to tighten the side bolt on your mount. Tighten till it's snug but do not go reefing on it. A longer handled tool is not needed for more leverage. I use no locktite and have never shot her loose. Once side bolt is tool snug tighten up the stripper clip area.
note*** if the lock ring behind the stripper clip screw is too tght..... this will throw off windage and if the front pressure pad is touching the receiver during mounting.... this will throw off windage.


your mileage may vary.... as the saying goes
Click to expand...

Is there a known torque specification or just use the bolt/grade chart?
 
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