AR-15 Receiver dimensions

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Telperion

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I have a pair of Lauer lowers that have a small variation in the thickness of the right wall in the fire control parts area (pics below). The folks on calguns said I should not worry about this; any AR experts here want to respond? I looked at a machining drawing for the AR-15 receiver, and I could not find dimensions listed for this wall. Is it true that this is not tightly specified? The difference in width is about 1/32 " and accounts for an 11 g difference in mass between the two lowers.

90433396_01553ed58b.png

90433369_cbae331a2d.png
(note the difference in relief around the takedown pin area)
 
relax about it.

Its not a critical dimension, its only cosmetic.

actually I take that back, its pure junk. It is not in spec and thus useless. I will buy it off you for $20 since I need a good paper weight.:)
 
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