U.S. property marked M1A mount mounting problem.

[DARKHORSE2]

I need help. I've mounted this mount several times. Each time the mount goes on the scope just runs out of windage and cant boresight. The mount will not go on straight no matter what I do. can anyone help?

[Rob454]

Is the mount bent? Can you use a straight edge or a square to see if its bent?
Sounds like the mount is bent slightly so thats why nothign lines up. I dont think you can easily bend those back. Probably easier to buy a new one
Did you get yours from a vendor? send it back and have him get you a new one

[sevensix2x51]

photos? you may need to shim the rear, if your windage knob is buried to the right, and youre still hitting left of center...

[jtv3062]

Smith mount? The springfield receiver is out of spec.
you might want to search over here http://m14tfl.com/upload/

[DARKHORSE2]

Is the mount bent? Can you use a straight edge or a square to see if its bent?
Sounds like the mount is bent slightly so thats why nothign lines up. I dont think you can easily bend those back. Probably easier to buy a new one
Did you get yours from a vendor? send it back and have him get you a new one

I purchased this mount from ebay. Let me say that the last owner used a grinder to remove some of the teeth from the rear of the mount. Do you think that the heat generated by the grinding could warp the mount? the darn thing goes on and lines up in the same spot every time. if it sight in I would have a resettable zero every time.

[jtv3062]

If you want to believe the mount is out of whack and not the receiver read this http://www.sadlak.com/si_m1a_receivers.html

alot of people have the same trouble you have. I have troubles with an ART II scope with both types of mounts, Smith mount, and A.R.M.S mount on my SAINC m1a.

Sadlak sells an receiver spec kit and they wiil make a mount to your receiver. You can buy an LRB arms m14 and use and mount made to USGI spec.

heres some text from the link

Sadlak Industries LLC takes pride in the precision and workmanship of the products we sell. These scope mounts are based on the original Brookfield Precision Tool mounts previously purchased by the military. They are precision machined to fit on any M14(military) or M1A(civilian version of the M14) rifle that has been machined to the original GI specifications. Unfortunately, not all current M1A receiver manufacturers adhere to the GI specifications particularly in the area’s of the stripper clip guide and left side surface and the left side horizontal groove. Older receivers have a better track record. If your M1A receiver is made correctly, this scope mount will fit against your receivers left side perfectly. The key on the inside of the mount will seat into the horizontal groove with only a small amount of play and the inside surface of the mount will rest flush, with no gap or visible light showing, against the machined surfaces on the left side of the receiver. If your mount does not fit this way then your receiver is not within GI specifications.
According to the GI receiver drawing #7790189 the 60 degree groove on the left side should be .070/.078” (per blueprint) wide at the bottom and .149/.153” (calculated from gage point) wide at the top. Our study shows that the GI groove is tightly machined with a tolerance or play of only .004 in the vertical movement. If your mount does not fit correctly, it’s most likely this groove is not within GI specifications and is cut too shallow resulting in a groove that is too narrow. To get your scope mount to fit perfectly with assured zeroing, Sadlak Industries LLC can machine the inside key of your scope mount for an additional charge. Please call for pricing and shipping procedures and to check if we have in inventory (non0GI spec.) mounts that have been specially machined with a left side key which is narrower to fit "out -of-spec" M1A receivers.

[Rob454]

how expensive was the mount? Was it a e bay cheapie or a high end one?

[DARKHORSE2]

how expensive was the mount? Was it a e bay cheapie or a high end one?

I paid 35.00 for the mount from ebay. I think that the fact that someone put a grinder to the rear teeth of the mount really had a lot to do with the low price. the Mount is a U.S property marked Smith Enterprises mount.

Last night I borrowed a friends boresighter and attempted to mount the Sightron SI scope on my AR15 and noticed that the scope was way off as well. So now I think that the scope may be the culprit. I do not have another scope to verify, but when I do I will inform.

I had an old set off windage adjustable rings and decided to put the scope back on the M1A. Using the adjustable rings I was able to mount and zero the scope perfectly with plenty of windage adjustability left on the scope.

[Hop Sing]

Some of the mounts require you to hammer the mount at the front receiver screw (on the mount) for a custom fit to the receiver. I would start there. If it was mounted and hammered onto the receiver, it may be out of spec.

For the 35 bucks it may not be worth the trouble. You have a 1400 rifle with a 35 dollar mount. You may want to invest in the Springfield mount, it is rock solid or try one from smith enterprise. I have installed them on a number of M1As and have had excellent results.

[xm177]

Springfield mounts lose zero. Go with Sadlak, by far the best.

[DARKHORSE2]

Some of the mounts require you to hammer the mount at the front receiver screw (on the mount) for a custom fit to the receiver. I would start there. If it was mounted and hammered onto the receiver, it may be out of spec.

For the 35 bucks it may not be worth the trouble. You have a 1400 rifle with a 35 dollar mount. You may want to invest in the Springfield mount, it is rock solid or try one from smith enterprise. I have installed them on a number of M1As and have had excellent re

sults.

Well, the receiver is out of spec. sadlack is the only high end mount that can be custom mounted. the 3rd gen SAI may work , but I here that they become loose.With that being said, I have always used loctite when mounting a scope/ scope mount with great success.

[DARKHORSE2]

Springfield mounts lose zero. Go with Sadlak, by far the best.

Thanks for the advise. I think that that may be the best thing to do.