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Old 07-10-2018, 01:52 AM   #1 (permalink)
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Milsig Squarehead Mag and 10-Round Tube Speed Loaders

Update:

I've uploaded my models to Thingiverse for non-commercial use.

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I've completed my first working version of a speedloader for Milsig Squarehead magazines. When used with a force fed loader like my VSL, I can load a mag in a matter of just a couple of seconds (most of which is spent winding back the follower). When engaged, the loader will fully load the magazine in about one second. If I want to refine the design farther, I may want to devise a means of blocking the flow of paint. As it is right now, I just have to turn the hopper upside down to stop the paint from coming out. I designed the speedloader to hold onto the hopper using an old Viewloader thumb screw.

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Last edited by JonM; 07-27-2018 at 11:39 PM. Reason: Additional designs
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Old 07-10-2018, 01:55 AM   #2 (permalink)
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Nice, that's awesome! Functional designs are my favorite

What are your ideas on blocking paint flow?
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Old 07-10-2018, 09:59 AM   #3 (permalink)
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Quote:
Originally Posted by Rainmaker View Post
Nice, that's awesome! Functional designs are my favorite

What are your ideas on blocking paint flow?
Thanks! If I decide to refine the design further (I'm sure curiosity will get the best of me), I'm thinking about adding a middle section with a sliding plate (spring loaded?) and a paintball sized hole to release the paint.
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Old 07-11-2018, 01:14 AM   #4 (permalink)
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You just had to go and tempt me, didn't you?

I haven't printed it yet, but here's what I've come up with. The button is designed to lock into grooves in the loader and work using the spring from a ball point pen. I suppose I'll have to try it out sometime soon and see just how well it works in real life.

https://a360.co/2KZRh0k
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Old 07-11-2018, 01:36 AM   #5 (permalink)
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Cool, I like it! So is it normally spring loaded to the open position? Like, do you have to hold it down in order to block the ball flow?
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Old 07-11-2018, 08:06 AM   #6 (permalink)
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Yes. The spring holds the gate open and the tabs keep it from flying out. When pressed, the holes line up and allows paint to pass through. My biggest question right now is whether or not the plastic will have enough give to insert the tabs on the gate into the channels without cracking the speedloader during construction (note to self: fillet the sides of the hole to allow easier insertion of the gate). I'm also thinking that I may want to add a second hole for a spring on the other side to add more tension and even out the pressure. I also want to add a peg on the other side to keep the spring(s) in place. I want to make sure that the springs stay put because I suspect that once the gate is installed, I'm not getting it back out to replace springs.
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Old 07-11-2018, 09:22 AM   #7 (permalink)
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Update:

The changes above have been made.

https://a360.co/2KZRh0k
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File Type: jpg Capture.JPG (27.0 KB, 166 views)
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Old 07-11-2018, 10:07 AM   #8 (permalink)
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Update 2:

I've increased the thickness of the walls of the loader to make it a more solid piece. I'm also including a view of the gate to better show the inner workings.
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File Type: jpg Capture2.JPG (34.3 KB, 163 views)
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Old 07-11-2018, 10:42 AM   #9 (permalink)
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Nice! I will be stealing some of the design for a 10 round tube loader... Unless you'd like to modify this design.

Ty
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Old 07-11-2018, 10:48 AM   #10 (permalink)
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Nice! I will be stealing some of the design for a 10 round tube loader... Unless you'd like to modify this design.

Ty
I may just have to do that. I'm also working on an alternate version of the gate with flexible tabs to allow easier insertion during construction (so long as they don't crack). Once I get the design refined, I'd be happy to work on a 10-round tube version. If you want to take a crack at it yourself, I can share the design with you too.
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