The mags have worked in the Scar and L85 for 2 seasons now.. i can't imagine them being the issue. The previous owner 'may' have damaged the hop unit when he smashed a BB into it and continued to fire under those conditions... i did clean out all the BB debris so if it's off the tolerances are so small i can't tell by looking at it.
The nozzle guides are fine.. in place and not damaged at all.
i feel like i'll have to check this after every single shot to ensure there is no floating BB in the breech..