Bolter Conversion for M4 Airsoft

Bolter conversion for m4 Airsoft gun
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UPDATES: Aug 2017
Fixes: July 2017 !
2 parts have been updated:
Boltergrip3.stl and BolterOuterBarrel4.stl
This now allows the handguard to lock in the outerbarrel :)
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The donor used for this was a G&G Raider Polymer bodied airsoft M4.

The inner barrel, front iron sight, metal reinforcing bar and bushing from inside the rail system were disposed of.
If you choose assembly 1 or 2 also remove the stock and the stock protrusion from the receiver sawn off. The Charging handle was also removed.
(Included pictures show the result).

There are 3 ways to use this kit:
1: Front wired using all parts with a QD attachment at stock end.
2: Front wired using all parts without a QD attachment at stock end.
3: Rear Wired ( in which case do not use the Stock End parts)

Using other models of airsoft gun.
Some modification of these parts may