These gun were always know to be electrical head aches.And till today avanix makes junk guns nobody wants.I bought a 45 cal rex because i bought it for 150 dollars from someone who took it in partial trade for automotive repairs.If i would have paid 800. for this gun i would be depressed about my not doing research on this heap.What i will do with this gun is install a 30 cal poly barrel.regulate the gun and then we will see what i have .At 150 dollars i guess ,i can always get my money back.i hope.