





Originally Posted By knarc:







Originally Posted By diluted:





Originally Posted By knarc:





Originally Posted By JedYonkers:



Does the mag function?







Yes it does. Right now, am I going to take and use this mag if my life is threated? Nope, I will pick all of my other mags before this one. I have not proven the lifespan of the mag. Plus, the ABS spring has some cyclic fatigue and stress relaxation which was expected. I wanted to make a completely printable mag which is why I went with the ABS spring. However, I could roll my own metal spring from 1/2 or 3/4 hard stainless wire or modify an existing magazine spring to address the issue. Yes it does. Right now, am I going to take and use this mag if my life is threated? Nope, I will pick all of my other mags before this one. I have not proven the lifespan of the mag. Plus, the ABS spring has some cyclic fatigue and stress relaxation which was expected. I wanted to make a completely printable mag which is why I went with the ABS spring. However, I could roll my own metal spring from 1/2 or 3/4 hard stainless wire or modify an existing magazine spring to address the issue.







Are you concerned with the mag melting? I have no knowledge of printed plastics so I'm just curious... Are you concerned with the mag melting? I have no knowledge of printed plastics so I'm just curious...







Well to be honest, if my life and/or my family is threatened would much rather use a more battle proven mag if I could. If I am out target practicing I would use the printed mag with no hesitation.







I would feel much better with a stainless steel spring mag spring. First, the polymer is a viscoelastic so the spring does not "react" as fast, due to internal damping within the polymer and second the stress relaxation and stress fatigue of the polymer spring in order to get enough force to to get it to overcome it natural damping becomes a problem. However, maybe with further testing a nice balance could be found







The next issue is the feed lips on the mag. Those are going to wear(I don't know that limit yet) and it is a high stress area when the mag is loaded which leads to stress relaxation. That is one of the reason I keep it at 5rds. To minimize the stresses and also the heat generated, imagine 30rds and the heat generated. ABS is a thermoplastic so it may start to melt with those higher temps seen in 30rd magazine. However, it maybe a worthy experiment



Well to be honest, if my life and/or my family is threatened would much rather use a more battle proven mag if I could. If I am out target practicing I would use the printed mag with no hesitation.I would feel much better with a stainless steel spring mag spring. First, the polymer is a viscoelastic so the spring does not "react" as fast, due to internal damping within the polymer and second the stress relaxation and stress fatigue of the polymer spring in order to get enough force to to get it to overcome it natural damping becomes a problem. However, maybe with further testing a nice balance could be foundThe next issue is the feed lips on the mag. Those are going to wear(I don't know that limit yet) and it is a high stress area when the mag is loaded which leads to stress relaxation. That is one of the reason I keep it at 5rds. To minimize the stresses and also the heat generated, imagine 30rds and the heat generated. ABS is a thermoplastic so it may start to melt with those higher temps seen in 30rd magazine. However, it maybe a worthy experiment



How much does it cost to make them? If they are very low cost the mag itself could become a true disposable product. If they are a Buck a piece and they work out of the box then they can become a true throw down.







How much does it cost to make them? If they are very low cost the mag itself could become a true disposable product. If they are a Buck a piece and they work out of the box then they can become a true throw down.