SPF This came out of my Colt 9mm A-2 carbine and was set up by JP Rifles. I pulled it when I sold the rifle. Small pins, single stage and broke up front at 4.5 lbs. The hammer is Rock River and is unused. I'm including a new set of springs. May need to be re-timed depending on your need. $75 shipped priority mail. Paypal (you cover fees), MO or cash in NOVA. Thanks for looking, Wolf.