Go Back   CMP Forums > CMP Sales > M1A/M14
Register FAQ Members List Calendar Mark Forums Read

Thread Tools Display Modes
Old 03-30-2016, 07:07 PM
2908 2908 is offline
Join Date: Sep 2012
Location: Wisconsin
Posts: 309
Default ARMS scope mount problems

I've been reading these threads for awhile and thinking maybe you guys can help me out. I had my kit built on an early Fulton receiver years ago and bought an arms mount and rings. The rifle shoots great using the iron sights but when I mount the scope my groups are huge and inconsistent. I did not use locktite. The scope has worked well for me on other rifles. It's a Trijicon. My question is were some of the early Fulton receivers sold as blems, and if so, would it involve the mating surface on the side where the mounts are located? My receiver is FA000382.
Reply With Quote
Old 03-31-2016, 05:31 AM
M14 M14 is offline
Join Date: Jul 2011
Location: south mississippi
Posts: 874

First off, your receiver may be a bit out, but more than likely it's the mount too. You have to have clearance everywhere but the pyramid, for lack of a better term, and the two splines.

Here's how I do it.

Loosen set screw and back out the front pad on the mount to flush with mount bottom.

Remove rear keeper and screws from back of mount.

Blacken inside of mount and splines, pyramid, and even along whole left inside of mount, using Dykem or black marker.

Screw mount onto receiver with mounting screw and tighten gently.

Hold rifle up to the light and make sure there is clearance on stripper clip guide dovetail at back, with light coming through, and clearance up front where you backed out the pad disk.

Fire a few rounds sighting off the top of the mount.

Remove mount and watch for any marks where the black is rubbed off, other than the splines or pyramid.

Remove offending areas from mount and repeat process if needed.

Once clear, reinstall mount and attach rear mount, after tightening mounting screw on the side you cleared. Make sure gap is still clear at rear and after tightening.

Screw down front pad until firm contact is made with receiver and install set screw. Use blue loctite on all screws.

Go shoot.

Let us know how it goes.........rip
Reply With Quote
Old 03-31-2016, 09:27 PM
2908 2908 is offline
Join Date: Sep 2012
Location: Wisconsin
Posts: 309

Thanks M14. I will give this a try. I appreciate the detailed instructions.
Semper Fi, Bill
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -5. The time now is 05:33 AM.