Hoping someone could help me with my problem

My loading nozzles are breaking at the point where the (return spring?) sits.
The pistol in question is a TM G18C
Just installed a PGC Slide + Barrel, Guarder Enhanced loading nozzle, SA 150% Hammer Spring
After installing everything and dry firing to see if everything works, i noticed the nozzle was still in a forward position, not stuck in the hop up unit. Thinking I fucked up, I installed the stock nozzle and the same thing happened after the first shot.