Jacky Chan of MILSIG Paintball Canada at the 2009 Paintball Extravaganza. MILSIG stands for Military Special Interest Group. 13CI HPA Tank Air through Stock System. Houses 13 Cubic inch high pressure air tank directly inside the stock so that you don't have to carry a remote line or extra tank. But you can directly plug a remote line via the nipple if you choose. Available for the Tippmann A5. Created a Tactical A5 concept for people to add MILSIG products/accessories to the A5. Paradigm Marker - Very limited release, received positive feedback. Made with high grade, aircraft grade aluminum, fully machined receiver and front shroud. Dry weight is 3.1 milligrams, sames as a loaded, real A1 rifle. Also make custom camo paint jobs by certified technician,plus engrave custom call signs or team names on markers. CQB hand guards, plus other hand guards of high quality. MILSIG Marksman barrel - 3 piece barrel, A5 threaded, triple polished and rifled inside. Markers are magazine and hopper fed convertible. Takes 2 minutes to switch. MILSIG Pro Connect 3 remote line that is fully pressurized, always and ready to go. Easy to depressurize with the push of a button.