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For .177 and .22 caliber Regulated rifles – lower power. 


Inexpensive way to get more shots per fill by keeping the hammer from opening the valve more than once during the same shot cycle, and wasting air – the rifle shoots quieter too.


*Rated a bit lower (less stiff) than the hill 262 hammer spring.  For lower powered applications using the stock hammer and/or for medium to lower powered regulated applications.



The Easiest air saving hammer spring system to install and the easiest to adjust.


Some of the features include:

+  Simple  “drop in”  installation.

+  Can be adjusted  “on the fly”  for more or less power.

+  Nothing sticks out the back of the rifle.

+  Can be used with all stocks.




 *   The hill 255 hammer spring has a .360 inside diameter and is compatible with gen 1 or gen 2 hammer spring guides.
 Note:  For the best air saving results, set the hammer throw (1/8″ hex wrench) to fully counter clockwise and leave it there always.  Then set the hammer spring adjuster (1/4″ hex wrench) to fully counter clockwise, then no more than about 2- turns clockwise – leaving at least a slight gap between the hammer and the valve stem. 


Package includes:   1- hill airgun 255 hammer spring, and shipping within the USA



Price: $9.98