The Perfect Brass Catcher.

I am still searching for the Perfect Brass Catcher (R).  But not finding one, and not wishing to wait for industry to do it for me… I did it myself.

To start out, I needed to study the mechanics of how brass ejects from my AR-15.  I figured a high speed camera and a few hours of range time would do it.  OR I COULD JUST GANK SOMETHING OFF YOUTUBE THAT SOMEONE ELSE ALREADY DID.

As you can see from the pattern, AR brass flips out of the ejection port shoulders first, slightly upwards and then strikes the brass deflector on it’s side.  Then bounces out around  3 O’Clock.

So, unlike my other brass catchers, the one I need will have to have sufficient upward clearance.

My material of choice is Kydex.  I bought a couple of sheets off Ebay.  Image

So first I Cut off a piece to practice with and see if it will have the grip I’m looking for.


I cut it several ways.  The Razor knife is slow but smooth.  Coping saw also worked.


Then I got this ides that it would be really bed if I messed up my only two sheets of Kydex.  So I built a prototype first out of paper.Image

Then I cut it apart to lay it out flat.


Then I made another pattern out of light cardboard.


Fortunately I just happen to have some old boxes around that were perfect for this.


Then I lay that out flat too and add some “assembly tabs” to the edges.


Then I cut my sheet of Kydex using that pattern.  Then, I heat it gently with a propane torch set on low and make the bends I need by folding it between two straight edges of steel.  I also clamped the Kydex to an old piece of rail.  Once the Kydex cools, It will maintain this shape and hold onto any rails.


Then I drilled a bunch of holes to attached on old piece of zippered net.




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About Professor Hale

Currently living in Virginia
This entry was posted in Arts and Crafts, Guns. Bookmark the permalink.

5 Responses to The Perfect Brass Catcher.

  1. AmStrat says:

    Wow, same laptop as I have…

    I know it was likely, but still, surprises me all the same. Good craftsmanship on the brass catcher!

  2. That’s the laptop I recently installed Win 8 on. It runs like a champ now.

  3. doomfinger says:

    Your boomstick looks scary-assaulty now!

  4. You are right. Maybe I should paint the flash hider day-glow orange, so that police will think it is an airsoft gun and not be afraid of it.

    But that particular gun doesn’t have a flash hider. It has a bull barrel with a non-threaded end.

    My scary assaulty-looking carbine has a flash hider. I could paint that orange, But you wouldn’t see it… being inside the sound suppressor.

  5. Giraffe says:


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