Desert Eagle jamming

Hi guys,
I’ve done the SA RnD upgrade on my Desert eagleand it doesnt seem to fire consistantly.
I am still just using the gels that came with the blaster so i don’t know if that can be the problems, but the blowback slide seems to get jammed too. when I pull out the mag there is a few gels just sitting in the mag cavity like they haven’t been drawn up into the firing barrel properly.

what should i look at in trying to fix this?