Project Appleseed

Hello All!

I have to admit that up until recently I have been a Ruger guy. However, with the Marlin LTR release, I went out and purchased two of them. One of them has worked well but I am having an issue with the second. After a few rounds on the squares target and an internal review of IMC, it is determined that I need to make a sight adjustment to the left. The problem is that I have the rear sight adjusted as far to the left as it will go and still need to go another 3-4 MOA. I have double checked to make sure that the rear sight is properly seated on the rifle's dovetail and the front sight is not bent or otherwise out of place.

Has anyone experienced a similar issue or have a potential solution? I have kept my eyes open at the last few shoots and it appears that many of the 795s on the line have the rear sights adjusted more to the left but none have "maxxed out" their horizontal adjustment.

Thanks in advance for reading my post!

Jim P.

Jim,
I had a very simalar problem at a recent event. Two brand new AS LTRs never fired, one was fine,the other student was unable to get enough windage adjustmet. After we bottomed out windage I began to  look for other problems, rear sight was fine, all the screws were tight,everything appeared normal, until I checked sight alignment. The entire front sight was mounted off center, point towards one o' clock, (exaggerated), but it definitly wasnt correct and the groups matched the error. The manufacturer either drilled the front sight off TDC or the barrel as not indexed in the reciever properly. Either way  we recommended the student return the rifle to their dealer, and inevitably back to Marlin.

Hope This Helps,
Jon

This is a fairly common problem with these rifles. It happened to one of my  795s a few years ago and it prompted me to cure the problem by putting on a scope instead. And that produced another problem. The scope mount kept sliding back slowly, even after several attempts to prevent it. Finally the solution to that was to drill and tap the receiver. It works fine now.

Quote from: dond on August 18, 2014, 09:22:29 PM
This is a fairly common problem with these rifles. It happened to one of my  795s a few years ago and it prompted me to cure the problem by putting on a scope instead. And that produced another problem. The scope mount kept sliding back slowly, even after several attempts to prevent it. Finally the solution to that was to drill and tap the receiver. It works fine now.

I recently encountered the sliding scope mount problem on a Marlin 795. 
A solution eluded us during the event.

Is there a solution to the sliding scope mount problem on a Marlin 795  that can be implemented on the line?

It's the front sight, Jim. All you have to do is bend the barrel a bit and it all works out. Put your knee just in front of the receiver, and pull the muzzle and stock butt towards you. It should center fine.

Alternately, find a fire hydrant (those are the things that grow out of the ground that you hook up the trucks to for water), grasp the rifle firmly by the barrel, and gently whack it over the hydrant until it's trued up. Just make sure that you're hitting it on the right side. And of course, make sure that the rifle is unloaded first.

Of course, as my cardiologist friend says, "prescription before diagnosis is malpractice."

I have heard of problems with the rear dovetail being machined at a cant, and of the front sight mounting hole being drilled at a cant also. If you remove the front sight, and put a straightedge from the center of the aperture (adjusted to the center of the rear sight assembly) to the muzzle centered exactly along the receiver and barrel, it should go straight over the centerline of the front sight's mounting hole.

I have not heard of any instances of Tech-Sights being out of spec.

There are several tales of woe on rimfirecentral and the marlin owners' forums about 795s with the front sight hole drilled at a cant.

Once you find the problem, or if you can't find it, the best solution is to return it to Marlin - but some guys have received equally canted barrels from their warranty returns. Marlin's QC, which was outstanding until 2008 when they were bought by Remington, plummeted afterwards.

A quick, temporary fix for the sliding scope mount, which is due to the dovetail being slightly undersized, is a paper shim. Figure ten minutes for the fix, then re-zeroing the scope.

I would think that just tightening the screws as tight as they will go would suffice for a day or two at an event since the slippage is so slow. However, repeats may be necessary.

I have a Ruger 10/22 carbine with Tech Sights TSR-100 sights.  As it arrived, I had a problem with needing to adjust windage all the way to the left.  It turned out being that the spring under the front post was too short.  I replaced it with an AR-15 spring, with more spring tension and the front sight then righted itself instead of being always slightly tipped.  With this change, the rear windage then needed to be centered mechanically.  Problem solved.  I don't know if the front post on the Marlin sometimes has this same problem, but it wouldn't hurt to check.

-gb

Quote from: dond on August 18, 2014, 09:53:32 PM
I would think that just tightening the screws as tight as they will go would suffice for a day or two at an event since the slippage is so slow. However, repeats may be necessary.

The last one I experienced (brand new Appleseed Marlin 795, brand new scope, rings provided by the scope manufacturer in the box) slipped .25 inches after 10 rounds of 22LR. 

The obvious problem was that the installer had failed to properly tension the rings where they connect to the receiver dovetail, thus I acquired a large screwdriver and applied reasonable torque.

Following 10 rounds the scope had again moved...

Solution:  Acquire larger screw driver and increase the torque.

Following 10 rounds the scope had again moved....

Solution: Exceed reasonable torque but don't break anything.

Following 10 rounds the scope had again moved, but movement was now down to 1/8th of an inch per 10 rounds.  Still unacceptable.

The front sight post on the Marlin sights (TSM-200) isn't click adjustable, rather it's fixed in place by a set screw.  You perform all your elevation modifications at the rear sight. 

One could make very course adjustments with the front sight if necessary, but it certainly wouldn't be repeatable.

Quote from: Guntuckian on August 19, 2014, 02:13:37 AM
I have a Ruger 10/22 carbine with Tech Sights TSR-100 sights.  As it arrived, I had a problem with needing to adjust windage all the way to the left.  It turned out being that the spring under the front post was too short.  I replaced it with an AR-15 spring, with more spring tension and the front sight then righted itself instead of being always slightly tipped.  With this change, the rear windage then needed to be centered mechanically.  Problem solved.  I don't know if the front post on the Marlin sometimes has this same problem, but it wouldn't hurt to check.

-gb