Progress report : Sorry guys, it’s a bit of a marathon read… I hope there’s some useful info in it
Pretty easy take down. 16 screws, into nylon which is a bonus. Been apart a few times and no signs of stripping screws. Recommend a gentle hand however.
Once the shell’s split the barrel and t piece come out easily. The cover for the priming switch comes off to remove the switch. The motor cage is two screw removal, I decided to drop the trigger switch wires to leave me with just the box with no loom. The motor cage is two screws to remove, simples. Nice clean gearbox.
Suprised to find a 1.3mm spring in this… more suprised to find about 1mm clearance between the factory o ring and cylinder, zero compression, hence the low initial FPS. One green o ring later, full compression. Standard spring back in, average 230FPS… respectable for it’s age.
Cylinder and nozzle are one piece plastic.
Nothing under spring pressure jumps out when the box is opened. The anti reverse latch was twitchier than a belly dancer with Tourettes, particularly at 11.1v, sometimes failed to latch . I relocated the tensioning leg to the screw lug directly above it to give it a bit more oomph… worked a treat.
Mag catch and release is janky, no location for the spring against the shell
Tried a longer spring but it bound up and felt worse
Back to standard setup for now but will be addressed.
To reassemble, once the motor and loom are back in place and trigger wires resoldered (putting plugs on these next take down) locating the box correctly into the shell is a bit tricky because of the fire select assembly. The selector switch on the body actuates this little puppy which lifts up the trigger mech to break contact for safety setting.
As the shell comes apart you’ll hear an audible click which is the back of the selector switch disengaging from the pin. On reassembly this lever
has to be depressed by levering it down via the aperture holes in the gearbox shell on the right hand side.
Push the gearbox into the left shell with the switch in semi auto… depress the internal actuator and you’ll here it click in and the box kind of locks in. Be careful at this point, a slight knock will dislodge it. Drop your other shell half on and do up those 16 screws.
Now that it’s performing as it should have OOTB and I’ve kind of got a baseline, next job is getting that FPS up around 280 -290. May be a bit of a strech with that plastic cylinder / nozzle, but it’s going to get there.
Oh, knocked up a scope for it inbetween fettling too