01-26-2023, 07:20 PM
Personally - When the magazines work in 1 firearm and not another I start to think its the new item introduced - this case the new lower. Seems like mag seating issues could be out of spec lower tolerances - though typically I haven't heard of that with BCM.
Try the upper on the other lowers? Might help narrow down if it is an upper or lower issue. Alternatively, try the other uppers on this lower? By process of elimination, you could find the culprit to be one element rather than all of the new firearm being suspect.
All of my various magazines (E-Lander, ASC, Duramag, C-Products, Amend2, Uni-Mag - disclaimer I honestly do not recall exactly which all are different and may be listing one twice between manufacturer/product name) fit my particular lower about the same, with very very little difference in fit/feel and slop. Though I think the Amend2 are slightly tighter fit than the others - polymer/bulge issues.
Try the upper on the other lowers? Might help narrow down if it is an upper or lower issue. Alternatively, try the other uppers on this lower? By process of elimination, you could find the culprit to be one element rather than all of the new firearm being suspect.
All of my various magazines (E-Lander, ASC, Duramag, C-Products, Amend2, Uni-Mag - disclaimer I honestly do not recall exactly which all are different and may be listing one twice between manufacturer/product name) fit my particular lower about the same, with very very little difference in fit/feel and slop. Though I think the Amend2 are slightly tighter fit than the others - polymer/bulge issues.