With AEGs now coming with quick spring change features as standard, we just need how each manufacturer do theirs and in this video 2 Tall Airsoft shows how to do it with the KWA TK45c AEG... "How to change an airsoft KWA TK45c Spring in under 5 minutes.

Unadjusted Spring FPS Results:

• Stock Spring = ~385 fps
• M105 Spring = ~345 fps

This is seriously a cool advancement in AEG design and quite possibly the only AEG I will never consider HPA'ing. I got stuck shooting too hot for an indoor field, but luckily they sold springs. I was able to quick swap this thing in 10 minutes with not ever having taken it apart before. You don't even need to take off the upper receiver which is amazing."