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  1. HK416 and HK417 HQ
    Hey folks, I recently got my MR223A3 and had previously ordered a Midwest Industries M-Lok handguard for it already (HK416/MR556 Handguard, M-LOK(TM) Compatible, 13.5-inch). I did not want to deal with the weird proprietary HKey mounting system, as all my accessories so far are M-LOK. After I...