Red dot on a 22 conversion

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Red dot on a 22 conversion

Post by 38Super!! on Wed Feb 25, 2015 10:33 am

Can a red dot be mounted directly onto the rear strap of a 22 conversion such as the Marvels/Nelson/etc.?

Wondering if the strap is strong enough to mount a red dot such as the Aimpoint Micro or UltraDot Micro.  Both scopes have removable bases.  

If holes were drilled into the strap and recessed longer screws used, it appears that the scopes would be quite a bit closer to the boreline.

Concern is if the strap is strong enough to prevent breaking or vibrating when the unit was fired or fired over time.

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Re: Red dot on a 22 conversion

Post by Jerry Keefer on Thu Feb 26, 2015 2:28 pm

Here are a few pics.. The only popular bullseye gun I haven't done is the AW.. Never saw one..So I can't say.
Top pic is a Kart with an Ultra Dot... next a Hammerli with a Micro, and last a Marvel with a Micro.



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Re: Red dot on a 22 conversion

Post by Rob Kovach on Thu Feb 26, 2015 2:40 pm

Nice.

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Re: Red dot on a 22 conversion

Post by 38Super!! on Thu Feb 26, 2015 5:49 pm

They are nice indeed.

What I am wondering about is removing the base mounts of the Aimpoint and/or Ultradot Micros themselves, drilling the appropriate holes as far back as possible in the very back edge area of the existing conversion mount, and then mounting the scope (with the base mount removed) onto the very back edge of the conversion strap so that the scope is about an inch further back than current weaver mounts allow and directly in front of the trigger.  I am referring to that area on the conversion mount from immediately above the chamber to the rear of the current mount.

Doing it that way would drop the scope down about 1/4" and would negate the need for a different or modified mounting base.  No new parts would be required. It would simply require drilling the appropriate number of holes in the existing conversion mount.

What I am concerned with is whether that area of the very back of the strap/mount on the conversion is strong enough to do so.  The existing mount of the conversions do not move so it would seem that there would be no, or very little, stress on the screws and, in reality, no more that on the scope as initially configured with the integral mount.

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Re: Red dot on a 22 conversion

Post by Jerry Keefer on Thu Feb 26, 2015 7:39 pm

38Super!! wrote:They are nice indeed.

What I am wondering about is removing the base mounts of the Aimpoint and/or Ultradot Micros themselves, drilling the appropriate holes as far back as possible in the very back edge area of the existing conversion mount, and then mounting the scope (with the base mount removed) onto the very back edge of the conversion strap so that the scope is about an inch further back than current weaver mounts allow and directly in front of the trigger.  I am referring to that area on the conversion mount from immediately above the chamber to the rear of the current mount.

Doing it that way would drop the scope down about 1/4" and would negate the need for a different or modified mounting base.  No new parts would be required. It would simply require drilling the appropriate number of holes in the existing conversion mount.

What I am concerned with is whether that area of the very back of the strap/mount on the conversion is strong enough to do so.  The existing mount of the conversions do not move so it would seem that there would be no, or very little, stress on the screws and, in reality, no more that on the scope as initially configured with the integral mount.
When planning this initially, there had to be a method to change out a defective optic in a reasonable amount of time..On the 1911 mounts, the extension tubes are removed to provide access to the base retaining bolts.  I use #12 counter sunk bolts, which extend into and thru the slide. The base is a light press fit into the rib which absorbs the recoil.

The next two pics are for the Hammerli. There is no need to remove the base plate. It is secured with 6 Torx heads.. The entire scope mount is removed from the gun, and the four small Trox Micro retaining screws are removed..  


Notice the inside contour of the  base plate.. These internal dimensions are super critical. The sides are 20 degrees. The small recoil stud in the center must fit into the scope base with absolute minimum tolerance to insure the scope remains secure. Its position is key to the screw hole C/L s and the tapered sides must be cut to create a very light press fit  between the scope and the base. So, to answer the conversion rear rib question.. There is not enough material to machine the Micro into that area.

This Marvel base is about as far back as you can get it, and retain max strength. The pocket the base fits into is a friction metal to metal tap in fit for maximum strength.

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Re: Red dot on a 22 conversion

Post by Jerry Keefer on Thu Mar 05, 2015 11:05 am

I should add to this, that I feel the optic should be mounted mid point. This places it in a near neutral plane regarding motion. Ideally, the muzzle area would seem the optimum position. Because the two C/Ls would be closest in that relationship, but that would be physically, difficult to control..

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