I took mine apart (naturally that’s what boys do) and discovered how it worked.
I then used 3-In-One Oil to lubricate the inside of the the barrel AND the Air Pump chamber and piston.
By doing this I was able to increase the pressure that launched the BB to the point it would go through a tin can..................
'twas no "I shot you --- no you didn't" arguments at the not so OK Corral.