Umarex Glock 19 Issue

[Haphazard]

Hi everyone! I’ve got a fresh out the box Umarex Glock 19.

Full mag, filled with green gas. Emptied the mag twice with no issues and shoots like a dream.

Tried it again the next day and it literally fired twice then nothing. There was no jamming of the action, so I’m putting it
down to either

A) It needs stripping and cleaning/oiling

B) The O-rings need either silicone oil or grease applying as there may be gas escaping preventing the action from cycling?

What type of lubricant do people recommend for metal on metal working parts and O-rings?

I’m relatively new to gas blow back pistols so any help with the above would be appreciated.

Many thanks

 

[Felinis]

Return it.

 

[MikeVV]

Is the cylinder empty (no pressure) ? You don't mention this.

All...moving parts can benefit from lubrication. I use Lucas Gun oil, exclusively on all of my co2 and PCP guns moving parts. If it rotates, rubs or slides, lube it.
Most use Pellgun oil on the top of the cylinder before...installing it into the gun. Your instructions may have noted this.

Mike