This monkey-01 has several upgrades namely:
-adjustable trigger from nexxspeed
-Ctm stainless steel hammer and auto sear set
- stock of action army
- hopup bucking from maple leaf
- maple leaf Jett inner barrel
- new recoil spring and nozzle spring
- suppressor and grip
- red dot
The hpa drum is custom made with a 2500 round arp-9 drum attached to a glock magazine on hpa. Works perfect and shoots very fast on full auto
The inner barrel still goes partly in the suppressor and because of this it shoots 1.2 joule. At extra cost I also have a hpa tank with line and regulator.
Exchange proposals welcome.