A5 threaded barrels are common amongst the Tippmann A5, X7 Phenom, Gryphon, Cronus and BT paintball guns. A5 threaded barrels are offer a perfect middle ground for quick barrel installment and a good air seal. You also have the choice to go with a New A5 Flatline Barrel that is specifically designed to fit your Tippmann A5s barrel adapter. A5 threaded barrels are easily found from brands such as Killhouse Weapon Systems, Tippmann, Inception designs and many more. 

Compatible paintball guns: A5, X7, X7 Phenom, TCR Mag Fed, TiPX, Cronus series, Gryphon series, Crossover series, BT-4 Combat/Slice, Omega series, Delta series, Killhouse Weapon Systems Omega series.