The 6310XE AND 6315XE (Xeno) are Dead Air Xeno compatible muzzle devices. Based on the successful designs that feature smaller and shorter 3 o'clock and 9 o'clock ports and provides 15 to 20% better compensator performance over TDP spec A2 compensator (Army designation), all without incurring additional concussion, noise and flash suppression, both are a closed bottom flash suppressor that reduces dust signature when shooting from prone. The Xeno Flash Hider and Adapter mate together with left-handed threads, eliminating your worries of the adapter unthreading from your silencer when removed. This also lets you verify your mount is still tight when installing on your firearm. Mfg: Forward Controls Design