FPS aeg spring m105+ for electric gun

New model made steel burnished and pre-hardened carbon steel with addition of silicon and chromium
irregular spring pitch with ideal air flow release
tested and certified with 363mm inner barrel and related cylinder
the performance may vary according to barrel and different cylinder use
ball bearing piston head and spring guide best match
max 105 m/s speed with 0.2bb
fits marui asg and compatible electric guns