Repositioned Mass (RPM) technology - it removes weight from the crown of the club head and repositions it to the sole plate of the clubhead. This is to increase ball speed off the face of the club,...
The "A" stands for "Approach". The loft is in between a pitching (P) wedge and a sand (S) wedge. Approach wedges are used for short, precise shots onto the green and are the same as Gap wedges.