Originally Posted by
taekwondopreacher
Anybody had problems with tolerance stacking using the Magpul M-LOK polymer rail sections and WMLs? I just assembled an upper using a 13" DDC M-LOK EMR and my X300 is loose on the polymer rail section. At first I thought it was the Universal adapter plate, but after switching to the Picatinny adapter plate, the problem is still there, though not as bad. I'm thinking of ordering an aluminum rail section at some point for a second piece to try the X300 on. The X300 has been snug on both M&P pistols and the Surefire MR07 1911 adapter rail.
my x300 fits very snug on all my pistols, but has slop on my kmr and mlok 1913 rails. I just shimmed it with little cuts of electrical tape. Not ideal, but the x300 lives on my hd rifle so I don't move it around much.
Tactical Nylon Micro Brewery
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