AAP-01 Short stroke kit, including a Hadron Designs specific 300% upgraded spring.
We tested 150, 200, 230% variation springs with most leading buckings.. But our 300% gave 100% feeding consistency in most SS (shortstroke) applications.
The shortstroke segment, is made from a bouncy material, effectivley taking the impact of the bolt, and bouncing it back. Hence why we nickname this kit, the "Bouncer".
This material property lessens the shock to the rear sight assembly.
PLEASE NOTE - The small round spring stiffening guide / tiny bumper for the nozzle spring assembly is no longer supplied or available with the bouncer kit. This will be removed in the images shortly.
As used by numerous YouTube airsofters across the globe. Install, and welcome to the BRRRTTT.
