Rifle Accessories - AR15 / M16 & AR10 - MFI - 4.75" Long Lug MFI HK G28 DMR Style Muzzle Brake / Flash Enhancer for any weapon with 5/8 X 24 threaded barrel. For 300 Black Out Only (NOT .308).  No Longer In Production. / Being Replaced with New Product. ETA 10-15-2020.