My DIY mag extension

guypanico

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Since nobody makes a higher capacity magazine, or mag extension, I machined my own today. My prototype is just made out of acrylic and bolted together to test function. It bumps my 8 round magazine to a 10 round. I can fit an 11th round, but cant get the magazine to push all the way into the mag well. So, i'll need to shorten it slightly so I cant fit 11 rounds on accident.

If it functions, it'll be made out of some impact resistant plastic, and contoured to match the grip. I wouldn't trust it with my life, but it would be nice at the range/idpa.
 

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Here's the mostly finished extension. Needs to be deburred and painted black. My nylon 6/6 is a deep navy or purple, not quite black.
 

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Nice job!!! I need to do the same to the Bodyguard 380. Looks like that will be my next project.
 
What about the mag spring? I know the Shield mag springs are long but adding that much more room for the spring may cause issues and I think you realize it due to saying it would be for range use only. Very cool concept and skill though. ;)
 
U mines well get the full size m&p! Haha. The purpose of the size of the shield is for concealment!
 
What about the mag spring? I know the Shield mag springs are long but adding that much more room for the spring may cause issues and I think you realize it due to saying it would be for range use only. Very cool concept and skill though. ;)

I think it will still be 100% reliable. Even extended, I dont really notice much pressure difference when loading the first round into an 8rd or 10rd magazine. But without doing longer term testing, I dont know about using it for defense.
 
The only thing I can say is WOW!! You can sell this. Have a patent and sell it dude.

With what material I have left, i'll make as many as will allow and sell them to whomever wants them. Not sure when I'll have the time to do that though. I dont plan on doing any production runs of them to sell. Of course plans always change. :p
 
U mines well get the full size m&p! Haha. The purpose of the size of the shield is for concealment!

I'm just using it at the range and matches. The 7rd magazine is my concealed mag of choice. With the +2 extension, the grip is as long as the slide! Maybe longer, I havn't measured it.
 
With what material I have left, i'll make as many as will allow and sell them to whomever wants them. Not sure when I'll have the time to do that though. I dont plan on doing any production runs of them to sell. Of course plans always change. :p

Man those are pretty cool. I call dibs on the first one you make. I will take two if you have enough. Let me know for real if you make some more and sell them I will buy some.
 
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