There is a piston in the LPR with an o-ring. If it is leaking from the front, then the o-ring is bad. -015 urethane. Same as you tank o-ring. If it is leaking around where it screws in to the body, then remove it and replace the 2 o-rings on the LPR.
My WTB/Trade thread
For God does speak—now one way, now another—though no one perceives it. In a dream, in a vision of the night, when deep sleep falls on people as they slumber in their beds, he may speak in their ears and terrify them with warnings Job 33:14-16