Pump Assist Modification
This modification by Airchanics to the classic Benjamin
397 and 392 Airguns reduces the pump force by
2/3rds compared with the factory version with no loss
in velocity.  
The Pump Assist Modification is temporarily out of
production. Production is expected to restart in the winter of
2009. Sorry for any inconvenience.
To read reviews of the Pump Assist Mod by noted airgun
expert and writer, Tom Gaylord, follow this link:
Pump Assist Part 5, Jan 11, 2008
To see this Pump in action, click on Demo. Notice the gun is
easily pumped by the pistol grip, allowing the use of a real
scope on a Benjamin. Pyramyd Air now sells an intermount by
Air Venturi specifically for this purpose. Goto Benji Scope
Intermount