Doesn't fit handgaurd cap. - Magpul Industries MOE SL Carbine Length AR-15/M4 M-LOK Handguard

I feel like optics planet is selling these as a "final sale" because they're flawed/out of spec. I've tried this with 2 different handguard caps and they don't sit flush. With molded items like this I assume the mold wore out and isn't in tolerance anymore. Waste of $40. Might bust out the dremel and see if I can shave it down enough to fit.