Technical information

Practical A.E.G Upgrade 2006
Page 111 Copyright 2005,06 The AirsoftPRESS (Hong Kong). All rights reserved.
How can I increase the ROF while keeping the FPS at
near-the-stock-level?
What is the right type of spring and battery to use for this purpose?
As previously mentioned, a softer spring is usually less responsive in terms of its
“pushing back” movement. A harder spring is harder to compress, but when it is
released it extends much faster. High ROF is possible only when movement in
BOTH directions is fast.
One way to raise ROF while maintaining the current FPS is to use a harder yet
shorter spring. Roughly speaking, a harder spring that has 2/3 the length of a
stock spring as well as 2/3 the amount of active coils should make it. Another
way of doing this is to get a M110 or M120 spring and cut away three to four
rounds of the tighter coils.
Do remember that a harder spring in any case will increase the current draw, so
you may need a battery with a higher mah value (a small 600mah Sanyo may
not cut it).
A teflon coated cylinder has a smoother inner surface to allow speedier and
smoother piston movement, therefore making it possible to achieve a higher
ROF without increasing the FPS. Do keep in mind that you don’t want to use it
with an aluminum piston, or the coating will get worn out easily.