This is the gen 3 version, not gen 2 - MDT Gen 2 M-LOK Exterior Forend Weight - 2 Pack

This is the Gen 3 version. It is thicker than the Gen 2 version which has the QD Sling Mount. The QD Sling Mount version is lower profile but this version feels more comfortable to grab although it makes the handguard much thicker to grab. I tried both and settled on this one over the one with the QD Sling Mount. Both fit on my MPA ESR chassis without any internal weights. Not sure if these will fit with MPA internal weights.