The First Strike 3K aluminum air systems feature a robust design and high quality 3000psi adjustable output regulator. The First Strike regulator is the lowest profile 3000psi paintball regulator in the industry measuring just .75 inch from the tank to ASA. The FS regulator features the FS Pro Low Profile burst disks, the PRO Fill Nipple with allen key removal, and high quality micro gauge. The regulator is 100% user serviceable using only two allen keys for all maintenance. Coupling the 800psi output pressure and multiple sizes makes the First Strike 3K aluminum air system a true winner. FEATURES/SPECS 360 Degree Rotation – Multi-position brass thread collar enables custom set-up without sacrificing reliability, convenience, or adding length Brass Threads – In addition to rotation 360 degrees, the brass collar eliminates the excess wear and galling common with aluminum threads Pro Fill Nipple – Featuring an exclusive conical strut that increases life of the fill nipple o-ring and reduces maintenance Pro Burst Disks – Exclusive flush brass pro burst disks with quad vent technology offer regulator safety without sacrificing low profile design Low Profile Design – Lowest profile regulator design in the market measuring just .75? from tank to ASA ISO Certified with 5 year Hydro test date