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 how to tighten upper/lower fit?
caver101  [Member]
10/21/2008 8:42:12 AM
How to tighten upper/lower slop with out using an accu-wedge??

What does a gunsmith do to tighten the fit between the upper and lower?

It must be pretty simple as its only a $50 charge from some top smiths.
Lawman734  [Team Member]
10/21/2008 8:53:00 AM
I dunno if you saw what GAP did with my Mk11 a while back, but they ream out the takedown lugs on the upper and fit bushings into place.
I've seen others that drill and tap the lower and use a setscrew to remove the play.

I think the GAP method is the most professional and effective method of doing it and it there was absolutely no play at all. If the wiggle bothers you, it is well worth the $50 to have them do it.

JP Enterprises has their setup which requires removal of the takedown pin and uses another pin which requires and allen wrench to remove, but I have no experience with it.
caver101  [Member]
10/21/2008 9:07:43 AM
I did not see that. I need to take a look at it next time we are at the range.

That LR308 I got the other day is loose as hell. Probably the worst fit I have ever got on a AR before.

You mind snapping a pic of it?? pretty please
KELBEAST  [Member]
10/21/2008 9:31:29 AM
Edited to say nothing.
Lawman734  [Team Member]
10/21/2008 9:38:14 AM

Originally Posted By caver101:
I did not see that. I need to take a look at it next time we are at the range.

That LR308 I got the other day is loose as hell. Probably the worst fit I have ever got on a AR before.

You mind snapping a pic of it?? pretty please


That was my first Mk11 I had a while back and sold, I wish I had it now as I wouldn't have to go through the wait I am going through now for this one. I'll check for pics on the hide as I've seen them there before.
While it has no noticeable affect on accuracy, my AR10 SASS rifle is the same way and I may consider sending it in also.


Oh yeah, and the post police is right-I suppose he could have PM'd you or actually reported you though instead of diming you out in the open forum.
caver101  [Member]
10/22/2008 8:32:04 AM
Well, I broke out the Devcon steelbed last night and bedded the rifle. I opened it up this morning and it looks decent.

I will try to take some photos today and post them on what I did.

In a nutshell, after cleaning the lower I put a small drop of devcon on the top front corners of the mag well and a "U" shaped bead around the back of the tang on the lower. I used a layer of very thin grease on the upper and it popped right open this morning. The bedding is not visible at all when the rifle is assembled. It don't take a lot of devcon to make it lock up tight. I hope to run some ammo through it tomorrow and see if it holds up.
SeanK1ng  [Member]
10/22/2008 8:41:45 AM
A small o-ring over the front "nub" for the pin to go through will take out all of the slop.

Sean
caver101  [Member]
10/22/2008 9:21:18 AM

Originally Posted By SeanK1ng:
A small o-ring over the front "nub" for the pin to go through will take out all of the slop.

Sean



Thats a good temporary fix.
SeanK1ng  [Member]
10/22/2008 2:58:07 PM

Originally Posted By caver101:

Originally Posted By SeanK1ng:
A small o-ring over the front "nub" for the pin to go through will take out all of the slop.

Sean



Thats a good temporary fix.


Yep, definitely temporary, but it's cheap and it works and is completely reverseable.

Sean