I've seen a few listing on gunbroker for MR223 (in RAL-8000). Did a small batch come in through some special arrangement? I heard some black 223s came in through Arms Unlimited before I started collecting HK stuff. Just trying to get educated on the market I'm still sort of new here

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...