Shortstroking method comparison

Hi guys. Like I promised, here's a quick comparison of the performance of the two shortstroking mods I tried out:
- DIY recoil buffer
- commercial extra recoil spring

Mod: commercial Shortstroking

Hi peepz, as promised, here's the post about the commercial shortstroke mod I bought.

The exact name is AIP Enhanced Recoil Spring and Shim - picture after the break.

Mod: DIY Shortstroking

So you bought a Hi-capa airsoft gun and you want to tweak it so it's better for IPSC?

That's where I am.

Read on for an explanation of my first ever mod to my hi-capa.