Problems with custom parts
Be aware that custom parts are not
guaranteed to fit and may require some
modification. If you decide to replace stock
parts with modified custom parts it can lead
to the AEG being altered in such a way that
the modifications cannot be reversed.
Barrels and hop units
Barrel performance is not necessarily related to
length. For example, an ICS CXP has a range
comparable to a full-length G3. If the barrel is
too long then the BB experiences more friction
which can reduce velocity and range of shot.
Fitting a tight-bore barrel can improve the
grouping of BBs and therefore improve the
accuracy of your shots. But this can also
increase the velocity, which can be a problem
on AEGs that alread