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Well it was raining today and the shoot at the range was cancelled, so I headed out to the garage/workshop to see what I could do about my current bullet buttons. I greatly appreciate the vendors who have come out with new compliance alternatives, but I wanted to see what I could with what I had.. and on the cheap.
Anyway, came up with a way, I think, to adapt my current bullet buttons to meet the current definition of fixed mag. As you can see in the attachment, I put the normal mag release spring under the bullet button, which was inserted the way it normally is. Then the nut was screwed in by pushing the bullet button down on the spring. I drilled and tapped (all threads were 10-32) the bullet button. I then took some 3/16 rod I had laying around and cut it with a dremel, stuck it in a vise and bent it, and then threaded each end. On the top end that rests against the upper receiver, I cut a small piece of delrin and drilled and tapped that as well. Then I assembled and... it didn't work. My design (if you can call it that) was for the rod to screw down into the bullet button and the side of it would rest against the bullet button nut. However, I had a gap and needed some type of spacer. So, looking around the bench where I do my reloading I realized I had a million spacers in every corner of the garage... spent primers. So I found an appropriate one, a spent small rifle primer, dropped it in on top of the nut, and then screwed in the rod and success.
I can't unscrew the delrin pad unless I lift the upper. Because of that delrin pad, I can't unscrew the rod unless I lift the upper. And I can't unscrew the bullet button nut without first unscrewing the rod. So, I think this works from a compliance perspective.
Still have to shape the delrin pad, but I'll do that if it rains tomorrow.
Total cost - $0.00 since I had everything in the garage already. Also, it is environmentally friendly since I'll be recycling a bullet button and a spent primer.
Anyway, came up with a way, I think, to adapt my current bullet buttons to meet the current definition of fixed mag. As you can see in the attachment, I put the normal mag release spring under the bullet button, which was inserted the way it normally is. Then the nut was screwed in by pushing the bullet button down on the spring. I drilled and tapped (all threads were 10-32) the bullet button. I then took some 3/16 rod I had laying around and cut it with a dremel, stuck it in a vise and bent it, and then threaded each end. On the top end that rests against the upper receiver, I cut a small piece of delrin and drilled and tapped that as well. Then I assembled and... it didn't work. My design (if you can call it that) was for the rod to screw down into the bullet button and the side of it would rest against the bullet button nut. However, I had a gap and needed some type of spacer. So, looking around the bench where I do my reloading I realized I had a million spacers in every corner of the garage... spent primers. So I found an appropriate one, a spent small rifle primer, dropped it in on top of the nut, and then screwed in the rod and success.
I can't unscrew the delrin pad unless I lift the upper. Because of that delrin pad, I can't unscrew the rod unless I lift the upper. And I can't unscrew the bullet button nut without first unscrewing the rod. So, I think this works from a compliance perspective.
Still have to shape the delrin pad, but I'll do that if it rains tomorrow.
Total cost - $0.00 since I had everything in the garage already. Also, it is environmentally friendly since I'll be recycling a bullet button and a spent primer.
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