Author Topic: M92 and marbles folding rear leaf (Read 2051 times)

mattmillerrx · « **on:** April 08, 2010, 06:42:15 PM »

My Marbles Tang and Folding rear Leaf came today. For some reason I thought I had read the dovetail was to small and would require filing to get the sight to fit. Well, I must have read that wrong the sight itself is too small for the dovetail. What have you guys done to make these fit.

I think I could maybe use something underneath to to shim it up a little. Also, thinking of drilling and tapping the center of it and using a set screw in the hole to tighten up the fit and make adjustments easy.

AtlLaw · « **Reply #1 on:** April 09, 2010, 08:32:19 AM »

I'm glad you posted this as I have one of those folding rear sights on backorder.

It seems to me that the rear sight Rossi puts on it's 92's have it locked in place with a set screw. This would probably explain why the dovetail is a little oversized. I just hadn't thought of that possiblity. $:-\$

I would think drilling and taping the sight as you mentioned would be the best option. YOU FIRST!

I'd look for another sight, but if my guess is right they wouldn't fit either. What about a shim on the bottom of the sight base?

mattmillerrx · « **Reply #2 on:** April 09, 2010, 10:14:09 AM »

Atlaw, no set screw on the factory sight. I thought that to as it was a female dog to get out. I will likely do the set screw.

Rangr44 · « **Reply #3 on:** April 09, 2010, 10:47:32 AM »

My Rossi's (one LSI, one BrazTech) both had standard rear barrel dovetails, when i filled the dovetails after installing receiver peep sights - but on others i've worken on, a BCS (beer can shim) worked just fine.

.

dpe.ahoy · « **Reply #4 on:** April 09, 2010, 12:02:56 PM »

Yup, one of my older ones had to have the aluminum shims, mine was soda,

to hold her tight. DP

AtlLaw · « **Reply #5 on:** April 09, 2010, 06:20:00 PM »

Well, I've had some practice with shims...

Guess I'd better get to work building up my supply!

mattmillerrx · « **Reply #6 on:** April 18, 2010, 04:52:47 PM »

I was planning to do the set screw but thought I would try the shim. Could not get them to stay in place and it would end up sticking out when I got the sight in place. Decided to do the set screw but could not find a suitable donor screw in my junk bin. Thought about it for awhile and had a few ideas to try.

What worked out was to use the top of the pop can which is slightly thicker. I cut it to the the same size as the bottom of the sight and super glued it in place to keep it from coming off when driving the sight in place. From there it was try for fit and file the bottom until I got a fit real close. I did not want to chance filing to much off and could not get the sight to drive in any more. I stuck it in the freezer for a good while and pulled it out and drove it in right away and a perfect fit. Looks like it came on the gun.

I did the hard part for you Atlaw. Now, you just got to work on finding the right "shim" and wait on that sight to come in. I should get my screw set this week for the tang sight and will be able to call this project done. Well almost, next is load development, and sighting in.

AtlLaw · « **Reply #7 on:** April 18, 2010, 05:49:41 PM »

Thanks Matt!

Give the sight a workout and let me know your opinion of it. If it does well I may put one on two other rifles, my Uberti M-73 and Marlin 30 TK. $:-\$

Rangr44 · « **Reply #8 on:** April 19, 2010, 04:43:36 PM »

There's a readily-available camo, so users don't go around exposing their private shims - It's called a Black Sharpie.

The super glue really isn't necessary if the sight & the shim aren't started in the dovetail slot at the same time, AND the shin is cut smaller than the sight width.

.

mattmillerrx · « **Reply #9 on:** April 20, 2010, 05:41:33 AM »

I tried about a dozen different shims of different sizes. Although, I got close several times I was not happy with the results. Mine really need something a little thicker than one shim but less than two. The superglue is not needed at all but sure made the job easy and if you need a better fit is a must for stoneing. I would not have been happy with the shim showing and covering it with sharpie but that is just me. It is good advise not to start the shim and the sight at the same time if you are not going to glue.

helotaxi · « **Reply #10 on:** April 20, 2010, 05:13:41 PM »

I've got this sight on my Rossi-BrazTech .357 and I'm a bit disappointed. While it's much easier to see than the awful leaf sight that the rifle shipped with, it isn't the correct height and lacks elevation adjustment. It needs a taller front sight as I'm shooting close to a foot high at 50 yards. I need to put it on the bench and figure out where it is at 100 and order the correct Marble gold bead front sight to go with it.

AtlLaw · « **Reply #11 on:** April 20, 2010, 05:21:58 PM »

Quote from: helotaxi on April 20, 2010, 05:13:41 PM

it isn't the correct height and lacks elevation adjustment.

Whow here!

I thought they advertised those things as elevation adjustable from around .030 to .050 or sumpin like that!

I assumed it was a sliding "U" notch. $:-\$

mattmillerrx · « **Reply #12 on:** April 21, 2010, 08:09:25 AM »

He must have a differt sight thab us atlaw.

helotaxi · « **Reply #13 on:** May 01, 2010, 02:17:35 AM »

Quote from: AtlLaw on April 20, 2010, 05:21:58 PM

Quote from: helotaxi on April 20, 2010, 05:13:41 PM
it isn't the correct height and lacks elevation adjustment.

Whow here! I thought they advertised those things as elevation adjustable from around .030 to .050 or sumpin like that! I assumed it was a sliding "U" notch. $:-\$

Yep, you're right. I figured it out. What threw me off was the other rifle I had with a buckhorn style rear worked differently. Now I just need to go back out and shoot it some more. Darn...

Jacko · « **Reply #14 on:** May 02, 2010, 12:51:42 PM »

That tip about putting the oversize sight in the freezer to shrink it down a tad is a beauty. Never would have thought to try that. Makes me wonder about what happens if your caught out in a harsh winter and you drop your rifle though

regards Jacko

Keith L · « **Reply #15 on:** May 03, 2010, 01:37:24 AM »

Quote from: Jacko on May 02, 2010, 12:51:42 PM

That tip about putting the oversize sight in the freezer to shrink it down a tad is a beauty. Never would have thought to try that. Makes me wonder about what happens if your caught out in a harsh winter and you drop your rifle though

regards Jacko

If it is similar metal (steel and steel) you should have not problem. The parts will shrink at the same (or close enough) rate.

helotaxi · « **Reply #16 on:** May 08, 2010, 04:53:10 AM »

Quote from: AtlLaw on April 20, 2010, 05:21:58 PM

Quote from: helotaxi on April 20, 2010, 05:13:41 PM
it isn't the correct height and lacks elevation adjustment.

Whow here! I thought they advertised those things as elevation adjustable from around .030 to .050 or sumpin like that! I assumed it was a sliding "U" notch. $:-\$

I got it out to the range yesterday and stand by the first half of my statement. At least on my .357 it isn't the right height. I lowered in as far as it will go and it still shoots every load I fed it about a foot high at 50yds. I ran loads from light cowboy .38s to 158gn full house .357s. They all were way high. The front sight sucks as bad as the rear did so I have no problem replacing it with a good one. It will also get the sights up to a more usable height for me.

mattmillerrx · « **Reply #17 on:** May 08, 2010, 10:48:08 AM »

I finally got to the range with mine. I have the adjustment on the rear leaf all the way down and it is dead on at about 150 yards with .357. Not what I was wanting. I will have to go with a taller front as well.

I shot the tang sight first and got it on target and was not happy with the groups I was getting. I had done better with the factory sights. I am going to go with one of the gold bead front sights and I think that will make sight alignment much easier. The U notch is not real good with the factory front either and the gold bead is needed for that sight alignment as well.

Anyone know the proper height? I will have to raise the rear up around wear I want it and shoot some targets do some measuring and some calculating and see.

helotaxi · « **Reply #18 on:** May 08, 2010, 02:58:42 PM »

It's either going to be the .530 or .570 that Marbles offers. I'm ordering both since they're not expensive. The factory sight is .500" high.

mattmillerrx · « **Reply #19 on:** May 09, 2010, 05:32:42 PM »

helotaxi, what model rossi do you have? Mine is the 24 in octagon barrel in .357.

Looks like mine is about .25 above the barrel and about .33 overall. Will have to take it out if the exact overall measure. The rough calculations I did tonight, I think a .450 or .500 would be ok on mine but another range trip would tell for sure.

I am thinking the .500 since that would let me move the rear sight up near the top.

Fairshake · « **Reply #20 on:** June 16, 2010, 05:59:30 PM »

Look on the brownell's site or book and they have a chart that shows you which sight to use and how you measure for it.

bulletnose · « **Reply #21 on:** June 23, 2010, 06:34:23 AM »

I did some measuring and comparing and it looks like the stock folding rear sight off of a Ruger 1022 will fit and function just fine. It can be ordered from MidwayUSA for about $12.00. Hope this helps.