I looked but didn't find a direct answer.
I'm guessing I already know the answer, but the basic difference between them is that the Express has the grooves on the inside of the cap and smooth lips while the Wingmaster/Police has grooves on the outside to mate with the ball on the barrel ring?
I ordered one for the Police/Wingmaster but I think I was sent one for the Express.
I'm guessing I already know the answer, but the basic difference between them is that the Express has the grooves on the inside of the cap and smooth lips while the Wingmaster/Police has grooves on the outside to mate with the ball on the barrel ring?
I ordered one for the Police/Wingmaster but I think I was sent one for the Express.
