Technical information

Practical A.E.G Upgrade 2006
Page 73 Copyright 2005,06 The AirsoftPRESS (Hong Kong). All rights reserved.
Why (and why not) should I use a Bore-Up Cylinder?
Why should I replace the stock cylinder on my MP5K / G3 SAS?
A Bore-Up cylinder is a cylinder with extra capacity for storing pre-compressed
air. You may consider the use of a Bore-Up cylinder if:
 you have switched to a very long barrel (refer to the high accuracy upgrade
section).
 you are going way beyond 400FPS. The marginal gain in performance
brought by the use of Bore-Up cylinder is less significant when you go below
400FPS.
 you are ready to shell out extra $ for buying a new piston set that can work
with the bore-up cylinder.
If you are upgrading your MP5K / MP5K PDW or G3 SAS with a longer barrel, you
will want to change the stock cylinder because the stock one was designed in
such a way that just-enough compressed air is produced to get the bullets out of
the short barrel. If you install a longer barrel, the amount of air held by the stock
cylinder will become insufficient. The type of replacement cylinder to use
depends on the length of the new barrel (refer to the next section).
When you use a Bore-Up Cylinder, you may also need to use a widened air nozzle
in order to take full advantage of the extra air volume accommodated by the
cylinder. The problem is that a widened nozzle is usually built with thinner plastic,
which is very easy to break.