This is a BX Trigger replacement for the 10-22 rifle. it lowers the trigger pull down to around 3 pounds. It is a geniune Ruger accessory. It is a drop in replacement. I used it for 100-200 rounds . Sold the gun it was in and kept the trigger assembly . Price is $50.00 plus $8.00 shipping, paid in a postal money order. I do have the instructions for it. First I will take it.... then send me a PM.