A considerable technology and the
knack are necessary to take M4 faction apart. The maximum problem
is "Difficulty of taking the around the neck apart. Whether
this "Barrel lock ring" can be removed is a point. Though
it is unconfirmed, it seems to be easy to remove the M4 series since
second lot comparatively. Though we make and opened a special wrench...
Then, the ring came to come off. However, it is not possible to
be relieved still for a while.
If power is put too much, it is transformed because the lock is
forcibly released.
The important one is "Barrel lock ring" and "barrel
base".
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"Barrel lock ring" |
"Barrel base" |
These influences the strength of the main body and the barrel directly.
When these are transformed, strength around the neck is lost, and
It becomes impossible to return to original as long as parts are
not exchanged. Please do carefully. It might be transformed even
if it does carefully.
Because there is no strength in the material.
Especially, because barrel base is made by zincky and has no thickness,
it is transformed indeed often. It produces it later because it
is thought that the custom parts are necessary for this.
Next, please note "barrel nut" related to the fixation
of the hand guard.
The M3 screw to fix the nut of the real outer barrel that PDI made,
the position is adjusted.
As a result, the hand guard side is cut down because it rubs against
the nut when the hand guard is set.
However, trouble is not caused by this wear-out. It was able to
become easy to insert.
When there is no strength on the neck:
When there is no strength on the neck by the transformation and
damage, the method of placing a thin spacer between barrel base
and barrel lock ring is effective. Some shaking can be decreased
by doing so.
When you cannot install the front sight well:
The ditch for the site is cut down a little shallowly.
Please cut down thinly with round stick file when feeling that tightness.
It is more effective that the inside diameter of the front sight
is cut down with the emery paper.
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