adding 2" to stock of GPR

[Misfit-45]

Hello,
I have a GPR Hunter that I'm starting to like. I have the Lyman 57 peep sight and in order to get the proper "circle" picture, I need to back up about 1 1/2" to 2". I need to lengthen the stock.I have an idea of how to do it so it could be reversible. I would place a block of wood contoured to the butt, screw it to the stock, and cover the whole thing with a leather, lace on butt pad from Buffalo Arms. It would look "period" enough in my opinion and extend the stock.
However, before I get started....Someone out there must have done this before. How did you do it? Thanks.
Marv

 

[hawkeye2]

I don't know how long your arms are but that is quite a bit to add to the pull. Lengthening the pull will also increase the drop and may position your eye too low for the sights requiring the comb to be built up. Have you considered different sized apertures and/or larger or smaller outside diameters?

https://www.vintagegunsights.com/Results.cfm

Your method should work specially if you wish to change the stock back later.

 

[necchi]

hawkeye2 makes a good point, that is a lot to add.

I'd also be more concerned with proper fit and be changing the sight aperture before messing with the stock.
Lyman has two aperture sizes for the 57 and you can always use a drill bit,,,

 

[BrownBear]

I'd also be more concerned with proper fit and be changing the sight aperture before messing with the stock.

Same here.

How tall are you, Misfit-45? I'm 6'4" with orangutan arms, and adding a 57 to one of my GPR's didn't inspire me to lengthen the stock.

 

[Misfit-45]

Hi again,
I'm only 6'2" with a dress sleeve of 36". What I am trying to accomplish is to get the rear peep small enough to see a small crack of light around the 17AEU hood of the front sight. The aperture is about .041, I don't know if a smaller one is available. I am using the post insert with the ball on top. Moving the sight is not an option since it would have to be moved forward (to make it appear smaller)which would interfere with the hammer.
I think I could use a longer stock anyway. When I hold the rifle in a natural position, the thumb on my trigger hand is about 1/2" or less from my nose. Not sure if that's bad or not, but my thumb pops me in the nose when the rifle goes boom. One other thing, if you notice, by filling in the "cut out" of the butt, it would give me an inch or more right there. Another inch beyond that wouldn't change the drop too much. Thanks.
Marv

 

[BrownBear]

Interesting line of thought- Never wandered down it myself (on either end of the rifle), but I'm interested in hearing what you work out.

One thing you might do in the interim is determine the thread size on the rear sight inserts. There are inserts around with really tiny apertures, even if the disc itself is larger than those on the 57. Easiest thing in the world for your trials would be to pick up one of those and turn down the OD if needed.

Another "angle" just occurred to me for your messing around. How about using some black poster board to make a blocker for the front sight rather than the rear- kind of like a black paper donut that extended around the front sight. Idle thoughts, but I'm trying to figure out how to test your ideas without spending a lot of money or hacking on a gun for the time being.

 

[Ed Wingenroth]

Change your front sight to an "open" apiture by cutting/filing it into a V shape opening... Nest your target into the saddle and fire !!! Good for bad eyesight too !!!!

Luck; Ed...

 

[Misfit-45]

Hi Folks,
I'd like to thank you for your ideas on how to change the sights, but my question was, has anybody tried to lengthen their ML stock? If so, how. As far as proper fit goes, how is it that shooters will shoot a half a day with a Thompson Center Hawken, then switch to a Pennsylvania rifle which has a totally different stock configuration, and shoot just as well as with the other one. It seems to me that proper fit is usually a concern for those who are making or buying a custom gun, not for those with an "off the rack" Muzzle loader.
Yes, a smaller aperture would help quite a bit, but I looked at the Lyman 57 site and apparently the sight I have has a .40 hole, which is the smaller of the two sights offered. One other sight disc from another company has a .28 disc, but it was $90. Too much.
Besides, I still think I could use more length anyway. I guess I'll have to take pictures of my new project. Thanks again.
Marv
As

 

[necchi]

Hi Folks,
As far as proper fit goes, how is it that shooters will shoot a half a day with a Thompson Center Hawken, then switch to a Pennsylvania rifle which has a totally different stock configuration,

:haha:
For me the Lyman GPR just don't fit,(period), it's even uncomfortable to shoulder let alone shoot.
The TC Hawken will slap my cheek so much that after shooting 20 rounds I feel like I've been in a bar fight with a lefty.

As far as folks switching, well some gys are just plain good shooters.

Be patient, I know I've seen some photo's here of guys that have done just what your talking about, someone will be along with the right answers soon, :wink:

How? take the butt plate off, trace the back of the butt stock out on paper, lay it out on a piece of wood and cut it out. Use a rasp and sandpaper to get it into better shape and fit, then screw it down and cover it with leather,
Oh wait, someone said that part already.

 

[ohio ramrod]

Here ( I hope )is my extension to my pedroseli sxs

I screwed the extension on where the origional butt plate was, put masking tape on the origional stock, and then formed the extension and sanded down to the masking tape and then used 400 grit sandpaper to blend to the origional stock sanding through the tape. While not perfect it handles well and can be removed to restore to origional diamensions. :idunno:

 

[Archie]

Fitting the new extension to the crescent stock will be another matter. Screwed the extension on then filed to shape.

 

[ZUG]

You have received many good ideas and pictures depicting add-on extensions. I would proceed thusly : remove butt plate and scribe profile of butt contour onto your extension piece of wood, band saw it out, file/sand to fit the the curve of the butt stock, screw it on and shoot it - if it works then proceed as you originally planned if not leave it as is or get a plank and make your own .

 

[bubba.50]

most slip-on pads add an inch or more & don't mess up yer gun. you can also get a Merrit eyepiece that adjusts from wide-open to completely closed. two models are available for target or huntin' situations.

 

[Misfit-45]

Hello again,
My challenge was to add to the stock, but make it totally reversible. No sanding of the original stock. My intent was make the addition more utilitarian than esthetic, hence the leather coverup. It turned out well enough. If it bugs me too much, I'll have a strip of leather sewn to the butt pad to cover the part of the add-on that's still visible. Overall, I'm happy with the result.
Marv

 

[necchi]

Nice job of fitting that wood, I can see you did some work there, :thumbsup:

 

[BrownBear]

Great job! Howzit fit you now?

 

[Misfit-45]

I won't know how it really feels till I take it to the range, but as for shouldering and pointing, it feels pretty good.
Marv

 

[hawkeye2]

Looks good, let us know how it works for you.

 

nice work!

i do wonder though how it might have looked had you fitted the rear or the extension with the buttplate and left the wood blonde

it might have been pretty cool indeed.

sometimes making no effort to hide something but to showcase it turns out really interesting to me.

sort of like a pretty woman with a prosthetic leg, that wears it proudly.

but thats maybe just me, and i am a bit strange.

bob g

 

[Birddog6]

Marv: Just out of curiosity...... :hmm: Do you have a shim plate under the base of that Lyman rear sight ? It is supposed to have a tapered shim plate to raise it & get the sights to where you have full adjustment. That is why that Lyman sight has a special number on the end of it so it has the shim & longer screws for the GPR. This could also get your head up away from your thumb.

Keith Lisle