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Thread: AR15 lower pocket shape
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30 June 2017, 05:56 #1New Member
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AR15 lower pocket shape
Can anyone explain why the machined fire group pocket in an AR has to join the pivot pin section? Seems there are other shapes and workable dimensions besides the more common single pocket with the pinched offset waist plus two different floor depths.
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30 June 2017, 14:23 #2
Could the answer be, because apparently it works very well ? So why "F" with it? Just a guess.
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30 June 2017, 14:47 #3
The next "shelf" that is inline with the safety selector is actually for a DIAS. A lower receiver either has a low shelf which will accept a DIAS or a high shelf which will not, although it can be milled out. I only buy low shelf receivers in hopes that someday they will be declassified from the NFA and we all get to own one. Hope that's what you are referring to.
Last edited by Stone; 30 June 2017 at 14:57.
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30 June 2017, 14:55 #4
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16 August 2017, 10:04 #5New Member
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16 August 2017, 10:16 #6New Member
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Mr Stone, you obviously have a better understanding of the design than most. In my case I have been working on some 80% lowers. When trying to get the best info showing dimensions for my machining effort, I downloaded some AutoCad drawings off the AR15 website. One such set did not join the two pockets at all. The trigger pocket was one depth period. The forward pocket, on this drawing, mainly having the pivot pin post did not connect. Certainly less machining for an 80%.
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16 August 2017, 10:19 #7
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16 August 2017, 12:08 #8New Member
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