ARMS Mount Crooked?

[amprecon]

I'll have to post a pic later, but I bought the ARMS #18 Mount for my S.A. M1A Standard and attached it as instructed and even mounted the Nikon 6X42 to it. I then realized the rings I had bought, Xtreme Tactical aluminum 3-screw rings, were too thick and didn't allow the scope to be brought far enough to the rear for me to see through it properly without having my face all up onto the receiver. So I removed the scope and shipped the rings back to MidwayUSA to exchange for some Millet single screw extended steel rings.
Anyway, whilst handling my M1A with the ARMS mount still attached, and looking down the sights I noticed that it is tilted to the left some minute degrees and also canted to the left off the bore centerline. Now if I can notice this discrepancy with the naked eye, I would have been perplexed at the range trying to sight in the scope on that mount.
As this is my first experience with any M1A mount, I didn't expect to experience this "lack of quality".
Has anyone else noticed this with their ARMS? Has anyone had problems sighting their optics in with it? Or is this just a quality fluke with me?
I also understand this is an approved mount for the military and that they use them and they supposedly have a NSN number for the military equipment catalogs.
Could it be that the receiver isn't machined properly?

 

[amprecon]

Here's the pics.

 

[trbon8r]

You have one of three potential problems. SA Inc. has been known to have some receivers that are more difficult than others to attach a scope mount to. In other words, many SA Inc. receivers deviate from original M14 specs enough to cause problems.

The other potential problem is that the mount needs to be taken loose, re-torqued and reinstalled. Did you follow the mounting procedure in the instructions carefully? It could be that the mount twisted a bit while it was being tightened.

Lastly, you might have an ARMS mount that is a lemon. I love the ARMS mount on my M1A, but things can and do happen.

 

[amprecon]

Come to find out the rifle is fine I got a lemon ARMS #18 mount. SA discovered this after replacing the receiver and the barrel, attached my ARMS #18 mount and it was still crooked. They put a known good mount on it and it aligned perfectly.