Limited Run Indiana Jones m1917 “Bapty” sight **RUN SIGNUP**

[KramStaar]

A stunning result, I also saw your post on FB.

Many thanks for doing this run. You knocked it out of the park and I know you have a bunch of folk who are extremely happy....!

High regards,
MARK

 

[skipcress]

I’ve had a couple of people contact me that they would prefer a version of the sight that was similarly “zeroed” as the factory M1917 sight, as the screen accurate sight is expected to shoot about 8” high at 15yards.

So, I’ve attempted to design a “ballistically accurate” variation of the sight, that would (in theory) not have the zero shift that the screen accurate version likely will. Due to costly setup fees involved in CNC, I can’t offer this as an option without also having a handful of people committed to this one as well. But just in case there is also demand for a “ballistically accurate” sight that is inspired by the screen accurate design, here it is. It is .100” taller and the proportions are obviously different.

Note that individual guns will have different point of impact, so even with this taller sight, results may vary from gun to gun.

Perhaps when expressing your interest, clarify one of the following (if not, I’ll just assume you mean screen accurate)

“In only if screen accurate”
“In only if ballistically accurate”
“In for either (but preferably____)”


View attachment 860630


Sent from my iPhone using Tapatalk

Sorry I’m late to the party, but I’m helping my dad on a project to build his own Bapty gun (I’m building the Stembridge), and wanted to clarify a point made in this post. The screen accurate front sight is expected to shoot 8” high at 15 yards, I’m assuming that’s with a M1917 in .45 ACP, correct? I ask because, as I’m sure you all know, the actual Bapty gun was actually a second model hand ejector in .455 Webley, and I’m wondering if it’s conceivable that the Bapty gun was sighted correctly for that round.

 

[lostinperiphery]

Sorry I’m late to the party, but I’m helping my dad on a project to build his own Bapty gun (I’m building the Stembridge), and wanted to clarify a point made in this post. The screen accurate front sight is expected to shoot 8” high at 15 yards, I’m assuming that’s with a M1917 in .45 ACP, correct? I ask because, as I’m sure you all know, the actual Bapty gun was actually a second model hand ejector in .455 Webley, and I’m wondering if it’s conceivable that the Bapty gun was sighted correctly for that round.

While my only “live fire” testing was done with 45ACP, I rather doubt there would any significant difference with .455. The original HE2 sights aren’t much different in height than their m1917 counterparts, and I doubt the prop makers would’ve had any need or desire to attempt to zero the sights on a movie prop firearm.

 

[szkoda1974]

I’m soon planning to cut the barrel of my m1917, and with the help of my knifemaker/machinist friend, mill a new “Bapty” style front sight. If there is enough interest, we will set the part up to run multiples via CNC.

*I've marked this as a 'limited run'. The run can be as large as we wish it to be, however this will likely be a one-time run.

Pricing:
I’m expecting the part cost to be around $60 (which is still much less than a gunsmith would likely charge to make one), but may be able to reduce the cost the larger the run. I’d need to commit to around 20 parts to make this worthwhile, and while I likely won’t require any down payment, I do ask that you only commit if you are serious about purchasing one.

Dimensions:
-I’ve modeled this using the published original prop dimensions wherever possible. I’ve then overlaid my model onto existing prop photos, and confirmed everything lined up as it should.

Details:
-sight ramp serrations- Originally, I had to make an educated guess at the serration style (“stepped” vs “toothed”), but with the recently posted Prop Store auction images, I’m fairly confident that these are toothed design, approximately 30 lines per inch. (16 “valleys” appear to be present on the prop).
-sight “tip” – again, the propstore images revealed a lot about the nuances of the tip’s shape and roundness, and by overlaying the model onto prop photos, was able to dial it in as close as possible.

Sight Height vs Point of Impact:
-.355 height (as measured from the ‘edges’ of the site block) would result in a sight that is 0.644 above center of bore
-My factory m1917 sight measure around 0.75 above center of bore (will vary from pistol to pistol)
-Through simple trigonometric calculations, this difference would move the point of impact up about 8 inches at 15 yards. However, the reduced muzzle weight and decreased “dwell time” of the bullet in the barrel may change the trajectory in other ways that are hard to predict without live fire testing.
-I feel it better to make the sight accurate to the prop dimensions, rather than do what a typical gunsmith would and make it oversized to allow the site to be filed down for individual zeroing. Filing after the fact would likely change the overall aesthetic of the sight, which is contradictory to the primary objective of having a screen accurate design.

Construction:
-I plan to mill these from 4140 steel, which would need to be thoroughly degreased and re-blued (either with cold blue, or hot)
-The underside contour will be milled using a uniform 5/8” diameter. To create the precise taper fit to the barrel, you may wish to lap it against sandpaper wrapped around the barrel, though this would likely be optional, as solder would fill the small void.
-the underside of the sight block will be milled with two 1/16” pin holes to accommodate locator pins between the sight and barrel during installation. These should help minimize the chance of the sight shifting during soldering, ensuring it remains centered and vertical. Alternatively, I’m considering attaching the sight using JB Weld in order to save from having to have the barrel reblued…

Anyway, here are the renderings and design as it stands!

In:
1.Mechanized2400 (SA) --SHIPPED
2.SMK1917 (BA only) --SHIPPED
3.Scottjua (SA)--SHIPPED
4.RoyDeckard (BA preferred)
5.whoever--SHIPPED
6.RobertMuldoo (SA)--SHIPPED
7. asavage (SA)--SHIPPED
8.justinian--SHIPPED
9.Halliwax (SA)--SHIPPED
10.KramStaar (SA)--SHIPPED
11.el toro (SA)--SHIPPED
12.Trebor (SA)--SHIPPED
13. Veektohr --SHIPPED

EDIT NOTE: THIS PHOTO IS OF THE FINAL, MACHINED SIGHT. ITS DESIGN IS SLIGHTLY MODIFIED FROM THE EARLIER IMAGES BELOW. YOU CAN READ MORE ABOUT THE ADJUSTMENTS LATER IN THIS THREAD
View attachment 944302


EDIT NOTE: THE FOLLOWING IMAGES ARE MY FIRST ATTEMPT AT THE DESIGN, AND ARE NO LONGER CURRENT AND ARE CONSIDERED INACCURATE. LEAVING THESE HERE FOR POSTERITY
View attachment 860456

View attachment 860457

View attachment 860458

View attachment 860459

Hi not been on RPF that long and have original smith and western and I see this tread is very old but do you have any sites left. Ps great work.

 

[szkoda1974]

I’m soon planning to cut the barrel of my m1917, and with the help of my knifemaker/machinist friend, mill a new “Bapty” style front sight. If there is enough interest, we will set the part up to run multiples via CNC.

*I've marked this as a 'limited run'. The run can be as large as we wish it to be, however this will likely be a one-time run.

Pricing:
I’m expecting the part cost to be around $60 (which is still much less than a gunsmith would likely charge to make one), but may be able to reduce the cost the larger the run. I’d need to commit to around 20 parts to make this worthwhile, and while I likely won’t require any down payment, I do ask that you only commit if you are serious about purchasing one.

Dimensions:
-I’ve modeled this using the published original prop dimensions wherever possible. I’ve then overlaid my model onto existing prop photos, and confirmed everything lined up as it should.

Details:
-sight ramp serrations- Originally, I had to make an educated guess at the serration style (“stepped” vs “toothed”), but with the recently posted Prop Store auction images, I’m fairly confident that these are toothed design, approximately 30 lines per inch. (16 “valleys” appear to be present on the prop).
-sight “tip” – again, the propstore images revealed a lot about the nuances of the tip’s shape and roundness, and by overlaying the model onto prop photos, was able to dial it in as close as possible.

Sight Height vs Point of Impact:
-.355 height (as measured from the ‘edges’ of the site block) would result in a sight that is 0.644 above center of bore
-My factory m1917 sight measure around 0.75 above center of bore (will vary from pistol to pistol)
-Through simple trigonometric calculations, this difference would move the point of impact up about 8 inches at 15 yards. However, the reduced muzzle weight and decreased “dwell time” of the bullet in the barrel may change the trajectory in other ways that are hard to predict without live fire testing.
-I feel it better to make the sight accurate to the prop dimensions, rather than do what a typical gunsmith would and make it oversized to allow the site to be filed down for individual zeroing. Filing after the fact would likely change the overall aesthetic of the sight, which is contradictory to the primary objective of having a screen accurate design.

Construction:
-I plan to mill these from 4140 steel, which would need to be thoroughly degreased and re-blued (either with cold blue, or hot)
-The underside contour will be milled using a uniform 5/8” diameter. To create the precise taper fit to the barrel, you may wish to lap it against sandpaper wrapped around the barrel, though this would likely be optional, as solder would fill the small void.
-the underside of the sight block will be milled with two 1/16” pin holes to accommodate locator pins between the sight and barrel during installation. These should help minimize the chance of the sight shifting during soldering, ensuring it remains centered and vertical. Alternatively, I’m considering attaching the sight using JB Weld in order to save from having to have the barrel reblued…

Anyway, here are the renderings and design as it stands!

In:
1.Mechanized2400 (SA) --SHIPPED
2.SMK1917 (BA only) --SHIPPED
3.Scottjua (SA)--SHIPPED
4.RoyDeckard (BA preferred)
5.whoever--SHIPPED
6.RobertMuldoo (SA)--SHIPPED
7. asavage (SA)--SHIPPED
8.justinian--SHIPPED
9.Halliwax (SA)--SHIPPED
10.KramStaar (SA)--SHIPPED
11.el toro (SA)--SHIPPED
12.Trebor (SA)--SHIPPED
13. Veektohr --SHIPPED

EDIT NOTE: THIS PHOTO IS OF THE FINAL, MACHINED SIGHT. ITS DESIGN IS SLIGHTLY MODIFIED FROM THE EARLIER IMAGES BELOW. YOU CAN READ MORE ABOUT THE ADJUSTMENTS LATER IN THIS THREAD
View attachment 944302


EDIT NOTE: THE FOLLOWING IMAGES ARE MY FIRST ATTEMPT AT THE DESIGN, AND ARE NO LONGER CURRENT AND ARE CONSIDERED INACCURATE. LEAVING THESE HERE FOR POSTERITY
View attachment 860456

View attachment 860457

View attachment 860458

View attachment 860459

Hi I know this is a old post I have a smith and western and would love to add this to it any help would be great thanks.