Silverback SRS Pull Bolt Ultralight Conversion Kit

Silverback Pull-back conversion kit for the Silverback SRS-A1 is a reverse mechanism: with the original bolt, the main spring is compressed while you push the front the bolt. With this kit, you will compress the main spring by pulling back the bolt, like most of the spring powered airsoft bolt action rifle. The volume of air is increasing from 28 cc to 41 cc (+46%), and this huge volume of air will allow you to reach high power with easier priming of the gun. 

Silverback SRS Pull Bolt Ultralight Conversion Kit 
Full Metal Construction 
Make your SRS Sniper form push cocking system covert to pull-back cocking system 
The Spring Provided with this kit develops a muzzle energy of 1.8 joules 
Suitable For Silverback SRS A1 Bullpup Sniper 

Package Include: 
Modified fibred nylon buttplate spacer 
Steel bolt head (welded) and steel cylinder 
Steel spring guide 
Aluminium light piston with synthetic rubber damper and steel piston end 
Synthetic rubber dust cover filled with foam (dust protection and noise reduction) 
APS M140 spring (13 mm outer diameter)