Spyders are simple to work on and pretty dependable as long as you lube them up once in a while.
Reasons for a full auto spyder:
Not enough gas pressure. You'll need CO2 or an air tank with an 800psi output for the gun to cycle properly. Medium or low pressure air tanks won't work.
Needs oil. Without lubricant, the internals will bind and not cycle fully.
Striker oring is damaged causing a pressure loss, which prevents the gun from cycling fully.
Sear return spring is missing or damaged, preventing the sear from catching the striker when the gun cycles.
ETEK 3LT, with 14" Ti boomstick and cure 3 + bolt F/S
Vanguard creed eyes, membrane, bolt pin, detents, gaskets, schraders, orings and more F/s[/color]
Old school angel poppets/cup seals(LCD and A4/speed), spring detents(not sure which models) F/S