Perfect Union banner
1 - 20 of 24 Posts

· Premium Member
Joined
·
2,304 Posts
Discussion Starter · #1 · (Edited)
So this is my story Mosin story,

I have two Mosin Nagant 91/30's one I kept stock with the exception of scoping it due to failing eye sight and the other a "Modernized" version, Poly Monte Carlo stock, bi-pod, modern scope, limb saver brand recoil pad and the subject of this tale of the jumping scope.

The original (1940Tula) was scoped by me about a year ago and I have probably put 500 rounds through her with no issues regarding the scope, I used the type of scope base that utilizes the "rear pins contact" point of the old ladder style sight base, old weapon, new scope, no issues.

Now the modernized one is an older hex receiver ( Izzy 1929 version) and the ladder sight base on this one was more narrow than the (1940 Tula) so I could not utilize the same scope mounting tech as I did with the Tula so I had to remove the entire soldered on ladder sight base which uncovered the dove tail sight mount under it (what a pain in the butt removing that one as it was soldered on pretty damned well).

I scoped the Izzy using the dove tail base and tightened the rings base screws down on the weapon to the point I thought I'd snap the dove tail mounting screws clean off, I also used the red locktite thread locker on the screws, I ran about 30 rounds through her at one range day until the scope jumped off the base which shocked me.

I remounted the scope pushing the limits of the base screws to the point of near failure, put about another 50 rounds through it and again the scope pops up and I catch it before it hits the ground, I replaced the scope rings and added even more red locktight, passed about 40 rounds through her and this time the scope ended up falling onto the range table.

I got her home and began to inspect the dove tail since the scope rings were changed out I figured it had to be something else, at first I couldn't see anything amiss until I examined the dove tail under magnification and this is what I discovered....

During the process of heating the ladder sight base off the welded on dove tail I had heated the base enough to tap and slide the ladder base off but not enough continued heating to allow all of the solder to run out of the tiny contact line where the barrel and the dove tail meet, I didn't see this as it was clean and uniformed after the removal of the sight base but it appears to be enough that I couldn't get the scope ring base to "bite" onto the dove tail enough to properly secure the rings to the dove tail base.

I remounted the scope again and will head to the range tomorrow to see if the scope will now remain on the weapon now that I have used a dremel and cut off wheel to clean the contact surface line of any remaining solder, if that doesn't work I have no idea where to go from there other than the possibility of mounting a Russian era PU or PE scope which I prefer not to invest $300-$400 for a scope on a $200 old battle weapon.:wacko:

So I guess this is a cautionary tale of trying to kit bash an old relic with new technology !

I do pray and hope that I have discovered the cause of my break dancing scope troubles.:angry:

Has anyone here had to deal with two different ladder style sight base sizes between an earlier and later version of the Mosin Nagant's ??? and if so what was your cure for the difference in base widths ?
 

· Premium Member
Joined
·
2,304 Posts
Discussion Starter · #3 · (Edited)
Now why didn't I think of that?

can you silver solder (or have it done) the ring base into the old dovetail?
Thanks RP, I do know how to solder and I have the stuff to do the job on hand, don't know why I didn't think of this?

That would be a good "next step" if my last one doesn't work out.

Outstanding idea !!!

You're the Man !!!
 

· Premium Member
Joined
·
2,304 Posts
Discussion Starter · #6 ·
You know I do not think they are "rim fire rings" as they came with the scope that was sold for a Mosin Nagant kit, so I am guessing they are center fire rings...No?
 

· Mosin-Nagant Nut
Joined
·
11 Posts
You know I do not think they are "rim fire rings" as they came with the scope that was sold for a Mosin Nagant kit, so I am guessing they are center fire rings...No?
No. Centerfire rings lock in with cross pins. Rimfire top-off rings don't. All these cheap scout setups do is throw an inexpensive pistol scope into rimfire topoff rings and have you knock off the rear sight base to expose the 3/8" dovetail underneath.

You really need to do something along the lines of a Brass Stacker scope mount if you insist on using a 'scope, or a Smith-Sights Adjustable Front Sight ( ;) ) with the stock rear if you are OK with irons.

Regards,

Josh
 

· Premium Member
Joined
·
2,304 Posts
Discussion Starter · #8 ·
JS, I like the idea of an iron sight set up! And Brass stacker is another option, I wanted to glass it because my 55 year old eyes only see so good.

I'll check into sight set ups for the Mosin.

And this Mosin didn't have the full rear sight when I acquired it, The "Ladder" style sight was missing but the base for it remained.
 

· Mosin-Nagant Nut
Joined
·
11 Posts
JS, I like the idea of an iron sight set up! And Brass stacker is another option, I wanted to glass it because my 55 year old eyes only see so good.

I'll check into sight set ups for the Mosin.

And this Mosin didn't have the full rear sight when I acquired it, The "Ladder" style sight was missing but the base for it remained.
If you decide to go with the iron sights, let me know. I'll send you a leaf/slider/pin/spring for that base (you do still have it, right?) Should look like this, complete:



Regards,

Josh
 

· Premium Member
Joined
·
2,304 Posts
Discussion Starter · #11 ·
I still have the base, but.

If you decide to go with the iron sights, let me know. I'll send you a leaf/slider/pin/spring for that base (you do still have it, right?) Should look like this, complete:



Regards,

Josh
Hi Josh, the ladder style "base" on my Hex receiver Izzy 1929 is narrower than my Round receiver Tula 1940, I still have the 1929 base I removed from the Izzy and have a complete rear sight for the 1940 Tula but the Izzy is more narrow than the Tula, don't know why this is, I could have used the "ladder" off the 1940 Tula but it is too wide to fit on the 1929 Izzy base.

But yes, that is the part in your pic.
 

· Premium Member
Joined
·
2,304 Posts
Discussion Starter · #14 ·
Non SA

Is your 1929 a Finnish (SA marked) M91, or just an M91?

The rear sights changed in 1930 with the 91/30 update.

Regards,

Josh
It is not marked SA anywhere so I am guessing a M91/30 I didn't know they changed the sights in 1930 this is probably where I am running into the size difference , Thanks !

I'd love to put a rear peep sight on her.
 

· Mosin-Nagant Nut
Joined
·
11 Posts
Here's a pre-1930 M91 sight:



and a 91/30 sight:



Most M91 rifles were turned into M91/30 rifles in the modernization program, and if you do indeed have an M91, I'd leave it be as it's more valuable.

I've tried the peep sights that replace the rear sights, but man, they're too far forward. I made, for a time, a Rigby-style cocking piece sight, but it took too much to stabilize the cocking piece for repeatability, though it did work well after getting the stabilization system going perfected and tuned in.

I've found that deepening the u-notch on the rear sight with a 2mm round diamond file has an excellent effect.

Regards,

Josh
 

· Premium Member
Joined
·
2,304 Posts
Discussion Starter · #17 ·
I still haven't had time to address the issue, life getting in the way and all.
Going to try different things suggested here and see what happens.
 

· Son of the South
Joined
·
546 Posts
Hey Jess,heres the web site for my local guy!He has Everything Mosin Nagant!!Family Owned and Operated.Stoped by yesterday and told him I was moving and the wife ended up buying a New 9mm!Shes as Bad as I am..LOL.Anyway he has All you need to get your 91/30 Right again and his $$$$ are Good!

Mark Kubes >

https://www.buymilsurp.com/mosin-nagant-parts-accessories-c-2.html
 
1 - 20 of 24 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top