Thanks for dropping in! It’s a Beeman break barrel with interchangable .177 and .22 barrels. I might pick up a chronograph later on, but honestly i don’t do enough shooting and tweaking of air guns to really justify one at this point. (Besides, I can probably build one – just have to put a second break-beam sensor in, some 12″ down the line. The oscilloscope and electronics are more than fast enough to measure the bullet speed.)

Mostly I just needed to convince myself that this sensor will pick up a speeding pellet.

I’ll have to look up GB Duct Seal…

I’ve had better luck making a trap that uses GB Duct Seal as the backing vs a phone book.