Installing a Scout Style Scope on a Mosin Nagant

By CTD Blogger published on in Firearms, How To

One of the most common questions customers have after purchasing a Mosin Nagant is, “How do I mount a scope on there without altering my receiver?” Generally, scopes are installed on to a receiver that is drilled and tapped to take scope rings. This presents a problem on the Mosin Nagant, as the straight handle bolt would interfere with the scope’s eye piece. The only viable alternative is to install a scout style scope, but the wooden stock and fore grip of the Mosin make such a proposition a bit complicated to properly execute.
DCAM0002
S&K Manufacturing stepped up to the plate with its Mosin 91/30 scope mount. It utilizes existing hardware on the rifle and replaces the original iron sight with a Picatinny-style rail to which virtually any scout style scope can be attached.

The most difficult part of installing the scope mount is driving out the pin that holds the rear sight in place. You’ll need a few simple and inexpensive tools that aren’t included with the scope mount to accomplish this: a punch and a brass hammer. If you use a steel punch (which we recommend, as brass punches are too soft and may bend or break) be very careful to make sure that it is perfectly lined up with the pin before striking it so as to avoid marring the sight. On most Mosin Nagant rifles, this pin is held very tightly in place and takes a while to carefully drive out.

Once the pin is most of the way out, the spring pressure on the leaf sight will push the sight up and partially trap your punch. Carefully remove the punch and then the leaf sight and spring before continuing to drive the pin out. With the pin completely driven out and the spring and leaf sight removed, carefully place the flange nut into the rear of the sight holder. Placed properly, it should appear as shown in the image to the right.

Next, place the actual rail in place into the sight box and place one of the screws through the hole where the pin once was and gently thread it into place but do not tighten it. Using your punch, ensure that the flange nut is lined up with the countersunk hole in the top of the rail and then screw it into place with the countersunk screw and an Allen wrench until it is just snug and then loosen it 1/4-turn. Then, turn the screw through the other side of the pin hole until both sides are snug before backing out 1/4-turn.

At this point the rail should have some play and be able to be wiggled ever so slightly. Remove the bolt and place your scope on the rifle and gently snug the rail mount rings onto your rail. Bore sight the rifle by and adjust the set screws on the rail until the scope’s cross hairs are near the center of the bore. For this process, you may need to remove the scope, adjust the set screws and then place the scope back on the rail. Once you have a decent bore sight, tighten up the counter sunk screw into the flange nut and then the pivot screws where the pin used to be. With the rail tightened up, reinstall your scope and continue to sight it in as you would normally.

Tags: , , , ,

Trackback from your site.

The mission of Cheaper Than Dirt!'s blog, "The Shooter's Log," is to provide information-not opinions-to our customers and the shooting community. We want you, our readers, to be able to make informed decisions. The information provided here does not represent the views of Cheaper Than Dirt!

Comments (8)

  • brian

    |

    I’ve modded hundreds of mosins. The ati is the worst mount , my favorite is the bullseyexpress, no bent bolt and you can still use stripper clips. I’m working on a tactical sportster, I’ll post a link when its done.

    Reply

  • alex

    |

    please respond ASAP!!!!!!! What is the nut looking deal in picture 5????? Where can I get one??? Plus… the hole for the pin is not lined up w/ the one on my scope rail mount… WHAT TO DO?????????

    Reply

  • Jean

    |

    What about the M44 version, does the kit fit that model?

    Jeanp1948

    Reply

  • Sailorcurt

    |

    Good point.

    I will say, though, that regardless of their numbers and relative inexpensiveness today, they won’t last forever.

    Even if the prices only go up to a couple hundred bucks someday, it still would be worth it to have the original bolt in original condition for the added value.

    Anyway, different strokes for different folks. As I said, I wasn’t trying to be critical.

    Reply

  • Alex

    |

    Hmm… you do have a point there – I must agree. But with Mosins being sooooo mass produced and costing about ~80 bucks (if we’re talking Russian / USSR made, a Finn will cost at least triple that in good condition) its more of a “Alex likes to have his numbers match regardless of a bolt handle being bent” statement thing than a true “gun collector” advice. Like I mentioned before – I was just sharing my thoughts and not trying to sound like I’m preaching, hence YMMV :)

    Reply

  • Sailorcurt

    |

    I’m confused about something Alex said. I’m genuinely curious, not trying to be critical:

    Isn’t the point of keeping matched number parts to keep the rifle in original condition and thereby hold its value better?

    If that’s the case, then doesn’t modifying the bolt handle defeat that purpose?

    I would think the better bet would be to keep the original, numbered bolt so that you can restore the rifle to original condition if you want to, and use a replacement bolt with the modified bolt handle for use with the scope.

    I would think that once the bolt is no longer in original configuration, any added value for having original, matched parts goes right out the window.

    Am I wrong?

    Reply

  • Alex

    |

    This is an excellent way to have a scope mount installed on a Mosin, much like my UTG mount except that UTG has 3 rails (top, left and right) so you can mount a laser target designator and / or tactical flashlight on the same mount as your scope. Most of the conversion bolt on kits suck. They get loose after a couple of hundred cycles even if you use thread lock compound. You can buy the so called “sniper” bolts from places like buymilsup, however if you want to keep your rifle with… all matching numbers I would suggest contacting Michael Battersby of http://www.mosinparts.com/, he has done great work for me in the past and my friends on their Mosin bolt handles. Last I checked he charged $45 + shipping to modify a bolt handle properly and thus keep your numbers matching. One more thing is to avoid the ATI scope mount (often sold as bolt handle and scope mount kit bundle) – it wont fit with most “sniper” bolt handles unless you use ATI’s bolt-on kit, which, as I mentioned before, are pieces of garbage (sorry ATI, you do make a great stock for this rifle though). UTG makes a much more reliable scope and accessory mount rail. You want a long eye-rest scope for this rifle anyway. Hell, I wouldn’t let anything well within of a few inches near my eye that shoots a 7.62 x 54R round. Just my thoughts and experience I had with quite a few Mosins I own(ed) and/or helped build up into scout rifles for my friends. Now what I would really like to see is a Dragunov (SVD) style stock in production, for now ATI Monte-Carlo stocks are the way to go if you want to get rid of an (almost) century old wood paperweight. I do have a Dragunov style stock which was custom cut from a walnut stock blank for me which cost an arm and a leg and is still heavier and more bulky than a composite or plastic stock. YMMV :)

    Reply

Leave a comment

Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. Please be respectful of others. We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. All comments are held for moderation and will appear after approval.


five − 2 =