View Full Version : U.S. Optics Posa Slide Lock mount

05-20-2007, 4:42 PM
Hi has any one here use a posa slide lock MK1 Mount. I have a Sadlak scope mount on my M1A Rifle. The Posa slide mount is supose to tighten via knob on the rail . The knob is tighten all the way but the scope moves a little on the Sadlak mount rail. The scope is tight in the rings but the slide mount is moving a little on the sadlak rail. Has any one had this problem? Any info would help. Thanks Wedge

05-20-2007, 7:02 PM
Yup. My SN-4 had the same problem with my GGG flat top rail. I sent both pieces in and had the USO mount fixed.

05-20-2007, 9:06 PM
When the mount is moving relative to the rail, sounds to me like it's a Weaver rail vs. Picatinny width issue.

05-21-2007, 4:31 PM
The sadlak mount rail is Picatinny, so is the U.S Optics Posa slide mount a Weaver?

05-22-2007, 7:49 AM
Looks like Picatinny to me, but they don't specify in the description.

I've measured a lot of rails and accessories, and there's quite a lot of stuff out there that's close but not quite Picatinny spec.