Wheeler Professional Digital Trigger Pull Gauge
 
Wheeler Professional Digital Trigger Pull Gauge with 1 Oz Increments and Digital Display for Accurate Readings from 0-12 lbs
 
I bought 2 of these off of amazon awhile ago. I do not need this second one. Still new in the paclkage. 
 
Amazon current price: $57.00
BUy this one for $30.