RFQ: Rear peep sight for rifle

[dotwx]

Hello,

I recently developed a rear sight for a rifle that mimics the A2 type sight on most modern day m16's. What motivated me to make one was what i found to be a lacking of compact, precise, and quality sight on the market that fits a weaver/picatinny rail and isn't bound to a 20" sight base. This sight measures just 1.25" long(the shortest adjustable sight i've seen is 1.69"), is accurate to the 1/8 moa(the most accurate i've seen is 1/2 moa), could be made out of high-quality aluminum in the USA( rather than mystery metal in China ), and is adjusted for a 30.7" sight base.

If the price is right i might order a prototype, But if i'm able to get some financial backing from a company(DPMS, POFA, BROWNELLS) there could be a possible future in it becoming a product. which means 100-1000 sights.


here are all the solid works files:
compact peep sight.zip

I would prefer for it to be made out of 6061 T6 aluminum and keep the tolerances as close or logical as possible.

However I am concerned if it will be feasible because of the small and deep cuts that i have specified.

Also i have a question about CNC machining since i only know a little about it. If a person wanted to get a rod threaded with a non-standard pitch can it be done without special machines that most cnc machinists or shops don't have? because i have a need for some pretty specific threaded rod that would be nice to have; such as 1/4-114 or 1/4-57.

thanks,
Sam

[jeffrey001]

Do you need all SolidWorks parts Machined?

I can't think how many hours this could take to machine all parts as a prototype

You will have to add some radius to your design or some cut out will have to be made on special machines.

0.004 end mill are not eay to work with and depth should be no more than 0.005

Engraving on an angle is not easy too.

Engraving on that angle at 66.32 degrees in not easy too, should try to made it more standard at 60 degrees.

Jeff

[dotwx]

All Solid Works parts would need to be created. As you can probably tell i don't know squat about machining, i'm only a software engineering major that likes to work with CAD.

Would the engraving be done more easily done with lasers?

Also when you say i have to add radius to my design you mean using the fillet tool on the corners right? If so where and how much because i don't really know much of anything.

thanks,
Sam

Do you need all SolidWorks parts Machined?

I can't think how many hours this could take to machine all parts as a prototype

You will have to add some radius to your design or some cut out will have to be made on special machines.

0.004 end mill are not eay to work with and depth should be no more than 0.005

Engraving on an angle is not easy too.

Engraving on that angle at 66.32 degrees in not easy too, should try to made it more standard at 60 degrees.

Jeff

[jeffrey001]

From the compact peep sight assembly, the 2 square cut out where the dial or knob is would be difficult to machine because it has square corner.


For the dovetail at the base, 90 degrees angle is OK but would be easier to machine if height was .125 instead of .110 because of the availability of the cutter which is 1/4 height.

113.68 or 23.68 degrees is not very standard for an angle to be machined, maybe if 30 degrees work for you, would be easier too.

Just my tought.

Jeff

[dotwx]

Ah, i see how the the cut out where the dial goes would be difficult because it's an inside cut, the smaller of the two cuts can have as much radius as possible. The larger of the two cuts can have as much radius as the dial allows it, and it that isn't enough radius than the dial can be angled at the corners to fit. I just have to know what kind of radius is being left behind by the cutter so i can adjust for it.

For the dovetail having the cut be .125 tall would work, i think, if not the space could always be filled with 1/8 shim stock

the angle where the engraving is done can deffinitely be changed to 60 with no problems.

thank you for your suggestions

From the compact peep sight assembly, the 2 square cut out where the dial or knob is would be difficult to machine because it has square corner.


For the dovetail at the base, 90 degrees angle is OK but would be easier to machine if height was .125 instead of .110 because of the availability of the cutter which is 1/4 height.

113.68 or 23.68 degrees is not very standard for an angle to be machined, maybe if 30 degrees work for you, would be easier too.

Just my tought.

Jeff

[dotwx]

here's the most recent design taking the interior cuts into consideration and the angle of engraving switched to 60

compact peep sight (2).zip