The AirForce top hat

by Tom Gaylord, a.k.a. B.B. Pelletier

This report was requested by blog reader Rob 8T2 and seconded by a number of others. I reported on the spring piston forward spring guide that’s known as a top hat, and he wondered if I was also going to talk about the AirForce top hat. Though they share the same name, the two items aren’t connected in any way. One is a spring guide, and the other is an adjustable valve stem for a pneumatic valve. The adjustable valve stem draws its name because, like the forward spring guide, it also looks like a gentleman’s top hat in profile.

AirForce Airguns old top hat
The sliding breech cover has been pushed forward, cocking the striker and revealing the breech for loading. This is the original valve from a first-generation AirForce Talon without a power adjustment wheel. read more


What is a top hat? Exploring the guts of a spring gun

by Tom Gaylord, a.k.a. B.B. Pelletier

Last week, I made reference to a heavy top hat affecting performance in a spring gun, and blog reader Joe asked this question:

“You wrote ‘…weighted top hat inside the piston, or the piston itself is heavy. Either way, the rifle should shoot medium and heavyweight pellets better than lightweight pellets.’

What is a ‘top hat’? Why would a heavy piston or top hat shoot medium to heavy pellets better?”

Joe, thank you for asking this question. This blog is now in its 10th year, and I forget that the readership has changed over that time. If one person asks a question, it means that many other readers are wondering the same thing and not writing in. Today, I’d like to review the main parts of a spring-piston airgun powerplant and discuss how they affect performance. read more