A heavy duty riser connector assembly for joining together and sealing sections of pipe, having an upper connector housing, a lower connector housing and grooves and ribs formed circumferentially on an outer diameter each housing. The assembly having a locking sliding sleeve to slide over and lock together the connector housing and a locking detent ring adapted to pop out and lock the locking sliding sleeve in place so the permanent locking sliding sleeve is not effected by vibration when the locking sliding sleeve has been slid over at least one flexible collet. The assembly can simultaneously seal a riser bore against internal and external pressure while additionally carrying heavy tensile and bending loads without deforming while engaging a riser for both drilling and production or any other application requiring rapid makeup of pipe.