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AR15.COM
9/17/2006 6:47:21 AM EDT
When I brought my speedmaster it came with a one piece scope mount. When I got round to mounting the scope I noticed that when the scope was mounted the mount rocked slightly backwards and forwards. I tried mounting it backwards and forwards but to no avail. I had a set of two piece mounts and that's sorted the problem. I checked the one piece mount on a different rail and it doesn't move at all so the conclusion is that the rail is slightly warped. The gun is only about a year old so I'm quite surprised.

Has anyone else come across anything like this and can anything be done other than just using two piece mounts?
9/17/2006 7:07:17 AM EDT
[#1]
The DPMS upper receivers have a slightly narrower rail than true mil-spec uppers.
This means that the one piece mounts that SGC sell sometimes don't clamp up tight enough.
It's more common than you think

Mark
9/17/2006 9:03:01 AM EDT
[#2]
Yep.

I had to swap rx's over due to a Larue mount fitting correctly and an ARMS one not!
9/17/2006 1:13:55 PM EDT
[#3]
Thanks for that. I'll have a look for a Larue mount if thats going to fit properly.

Cheers