lostinperiphery
Well-Known Member
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. I have 3d modeled the sight, and plan to use his CNC to mill the sight itself. If there is interest, I may try to talk him into doing a short run of them as well.
Design Details:
I’d like to try and make this as close to the original prop dimensions and design as possible, and was hoping to get some feedback on the design as it stands. I’ve modeled this using published original prop dimensions, however I had to make some estimations regarding the sight ramp serrations, as well as the tip of the sight itself. It would be simplest to machine the serrations in 90 degree ‘steps’ as shown here, but if we know they are different, I will do my best to replicate the original design. For example, I could machine the ramp smooth, and hand cut “teeth-like” serrations using a checkering file (which would increase cost in a run of parts).
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 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 re-blued…
Please let me know what you think of the design so far, or if you know of any better reference images or material [emoji4]
Renderings:
Reference image from Profiles in History Auction in 2012
Reference image from “The Complete Making of Indiana Jones”
Sent from my iPhone using Tapatalk
Design Details:
I’d like to try and make this as close to the original prop dimensions and design as possible, and was hoping to get some feedback on the design as it stands. I’ve modeled this using published original prop dimensions, however I had to make some estimations regarding the sight ramp serrations, as well as the tip of the sight itself. It would be simplest to machine the serrations in 90 degree ‘steps’ as shown here, but if we know they are different, I will do my best to replicate the original design. For example, I could machine the ramp smooth, and hand cut “teeth-like” serrations using a checkering file (which would increase cost in a run of parts).
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 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 re-blued…
Please let me know what you think of the design so far, or if you know of any better reference images or material [emoji4]
Renderings:
Reference image from Profiles in History Auction in 2012
Reference image from “The Complete Making of Indiana Jones”
Sent from my iPhone using Tapatalk
