Bottom barrel only without hammer spring. This trigger has had issues in the past, but all repairs have been professionally made. It has a replaceable shim to remove slack in the trigger and has no creep with a crisp 3 7/8 pound pull. The blueing has been polished off the guard to match my factory nickel receiver. The trigger works perfectly and if you are not satisfied with it, return it for a full refund less the shipping cost. $275 plus shipping. The first person that post on this site "I will take it" gets it.