RedRocket1647545505 Posted June 9, 2010 Report Share Posted June 9, 2010 Magpul has just filed a patent application (#20100126053) for a quad stack AR-15 compatible magazine. http://cdn1.thefirearmsblog.com/blog/wp-content/uploads/2010/06/tmp_magpul_quad_magazine-tfb.jpg The design is quite straight forward. A central partition separates two dual staggered round stacks. Two springs are used, a lower stronger spring and a weaker top spring, which are joined by spring slicer. The magazine has a constant curve geometry. Interestingly, the transition area (16) is asymmetric in order to stagger rounds correctly. http://cdn1.thefirearmsblog.com/blog/wp-content/uploads/2010/06/tmp_follower-tfb.jpg The follower The follower is very interesting. Two bails (58a and 58b) are spring loaded. When the follower is pushed against the central partition they part and reveal a hole which allows the follower to descend below the partition. The patent does not reveal what the capacity of the magazine would be. I would expect it would be around 50 rounds. The patent application comes on the heel of the announcement from Izmash that one of the major features of the AK-200 will be a 60 round quad stack magazine. It seems 2010 or 2011 may be the Year of the Quad Stack Mag! A quad stack magazine would be ideal for the M27 IAR. I have no doubt that Magpul will eyeing a lucrative contract with the USMC. You can read the full patent after the jump. UPDATE: Drake at Magpul said to me "Unfortunately I am unable to disclose any other info at this time on the product in question." http://www.thefirearmblog.com/blog/2...tack-magazine/ Too bad Ohio law still prevents 30+ round mags... Quote Link to comment Share on other sites More sharing options...
RyM3rC Posted June 9, 2010 Report Share Posted June 9, 2010 Too bad Ohio law still prevents 30+ round mags... yeah, no kidding. I don't understand how we can get drums, but not 40-round mags. WTF? Might have to get AK pouches for that chunky thing! Quote Link to comment Share on other sites More sharing options...
RedRocket1647545505 Posted June 9, 2010 Author Report Share Posted June 9, 2010 yeah, no kidding. I don't understand how we can get drums, but not 40-round mags. WTF? Might have to get AK pouches for that chunky thing! We can have drums? Quote Link to comment Share on other sites More sharing options...
stolen 5.0 Posted June 9, 2010 Report Share Posted June 9, 2010 my gun dealer down here sells drums, he is in ohio Quote Link to comment Share on other sites More sharing options...
unfunnyryan Posted June 9, 2010 Report Share Posted June 9, 2010 We can have drums? I'm buying a 50rd .22 drum. The magazine size limit does not apply to .22lr. Quote Link to comment Share on other sites More sharing options...
RyM3rC Posted June 10, 2010 Report Share Posted June 10, 2010 We can have drums? Oh geez, don't get me started on this. Under the shady ORC it's only illegal if you have more than 31 rounds loaded in the firearm. My understanding/interpretation is that a drum or 31+round magazine is legal until you load it with 31 rounds, then stick it into a SEMI-automatic firearm. It's still something that really had only ever been tacked onto existing charges. Most places will ship to an unrestricted area of Ohio, apparently AIM no longer will. Shame on them. Quote Link to comment Share on other sites More sharing options...
schmuckingham Posted June 10, 2010 Report Share Posted June 10, 2010 you know you can load 31 rounds into a PMAG, the cover wont clasp on though Quote Link to comment Share on other sites More sharing options...
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