MDRX 16” Barrel & gas block
 
Barrel: CNC 6000 series aluminium series, black anodized.
 
Gas block: ADC 12 aluminium, black powder coating
 
For inner barrels up to 310mm with 7.62 Ratchet muzzle brake (and up to 330mm with 5.56 Raiden muzzle brake or 14mm Suppressor)