My ‘73 M10/45 has a noticeable gap where the rear of the upper meets the lower, allowing the upper to wiggle up and down on the lower. I know some folks use layers of aluminum tape to fix some of this slop but is there a more permanent fix?
You left out some variables? Is it all uppers that have the slop? What I would do is epoxy a few aluminum or brass strips to the bottom rear of the said upper. Question is by raising it up will it over run the sear? Another option is to lower the “Hood” of the rear of the lower which will give you a more snug fit. Sound like you might have an out of spec stock block or your hood is to high? Imho. YMMV.My ‘73 M10/45 has a noticeable gap where the rear of the upper meets the lower, allowing the upper to wiggle up and down on the lower. I know some folks use layers of aluminum tape to fix some of this slop but is there a more permanent fix?
Wait the lage uppers have screws?I'd just drill it and tap the upper for a set of grub screws like the Lage uppers have.
The 15 does.Wait the lage uppers have screws?
View attachment 40236
Follow up, on my ‘73 Powder Springs the gap in red is 1.37mm, anyone else willing to measure theirs for me? Just curious if this much of a gap is normal, lots of play between the upper and lower.
I know these aren’t precision built but a 1.37mm or 0.054” gap seems pretty big, I’m chasing down some FTF issues and was wondering if this slop could be a cause of my issues.It’s normal, all MACs are like this.
I know these aren’t precision built but a 1.37mm or 0.054” gap seems pretty big, I’m chasing down some FTF issues and was wondering if this slop could be a cause of my issues.
Take a big hammer and wail on the top of the lower a bit. That will take up the slack.![]()