Hi all .
After disassembling and reassembling the rifle in order to put a new T/B barrel a number of problems occurred , that puzzled me a lot since it is a brand new rifle and except that, everything else is still stock .
In particular , the gun jammed every second round (round chambered , piston perfectly held by the shear but when the I pull the trigger all I got was a "pffffft" sound and no round fired - I had to re-cock couple of times to properly fire the weapon. Of course I had to take out the mag as in a real gun to avoid double feed) , some times the rounds just fell out of the barrel and I noticed that they were marked as if they were rubbed in force against metal or when they eventually fired they followed a right hand trajectory and the range was worst than stock barrel .
Anyway after some experimentation I found the culprit to be the small screw that holds the hop-up into position .
It seems that if you tight it enough , it press the hop-up against the upper part of the receiver and makes the nozzle not to fit in properly when cocked .
I left the screw loose (it just holds into position) and "voila" everything works now as advertised . It even unleashed the full potential of the new barrel .
It seems to me like a design flaw (otherwise for an excellent rifle) and I'm trying to think of a better way to secure the hop-up into position than that horrible little screw .
I'm open to suggestions .
After disassembling and reassembling the rifle in order to put a new T/B barrel a number of problems occurred , that puzzled me a lot since it is a brand new rifle and except that, everything else is still stock .
In particular , the gun jammed every second round (round chambered , piston perfectly held by the shear but when the I pull the trigger all I got was a "pffffft" sound and no round fired - I had to re-cock couple of times to properly fire the weapon. Of course I had to take out the mag as in a real gun to avoid double feed) , some times the rounds just fell out of the barrel and I noticed that they were marked as if they were rubbed in force against metal or when they eventually fired they followed a right hand trajectory and the range was worst than stock barrel .
Anyway after some experimentation I found the culprit to be the small screw that holds the hop-up into position .
It seems that if you tight it enough , it press the hop-up against the upper part of the receiver and makes the nozzle not to fit in properly when cocked .
I left the screw loose (it just holds into position) and "voila" everything works now as advertised . It even unleashed the full potential of the new barrel .
It seems to me like a design flaw (otherwise for an excellent rifle) and I'm trying to think of a better way to secure the hop-up into position than that horrible little screw .
I'm open to suggestions .