hey man, i cut a square of aeg hop rubber the width of the hop window and maybe 5mm long and put it below the hop arm where it contacts the rubber.
it's a right pain to put the assembly back together, i found if you put the hop/barrel together then set the square on it in-position then if you take the hop arm and put one of the hinge sides in one hole then sort of twist it to get the other in while holding the 2 halves together to stop them falling apart worked quite well.
then there's the usual twiddling of the barrel to make sure it's square. you can swap to a maple leaf style hop at the same time if you want to lift anything heavier than .3's although the stock hop with the rubber square can lift .3's just lovely this time of year.
Getting it apart is easy, just pull the slide off and towards the back of the barrel you'll see a tiny pin, punch that out and give the barrel a yank and it should come off the front, then you take a knife/flatblade screwdriver to help pull the hop/barrel out of the back of the outer barrel, it spontaneously dissasembles itself from there.
Re-assembly is the reverse just remember to turn the hop adjustment all the way off before sliding the unit back in and sometimes you might need to pull the trigger to get the barrel to slide back onto the frame.
All in its a very slick system, much more robust design than your run of the mill 1911/glock/sig style of hop unit imo.
One of the maple leaf ones, dunno the specific name but it's the same rhop style of shape as the stock we one but a longer contact patch and slightly better rubber.
Tbh the stock one is pretty good, just not quite long enough of a contact patch to lift .4's but will easily send .3's far enough to shame some rifles once tweaked, this time of year its too cold to get enough velocity on .4's for even the maple leaf.
it's a right pain to put the assembly back together, i found if you put the hop/barrel together then set the square on it in-position then if you take the hop arm and put one of the hinge sides in one hole then sort of twist it to get the other in while holding the 2 halves together to stop them falling apart worked quite well.
then there's the usual twiddling of the barrel to make sure it's square. you can swap to a maple leaf style hop at the same time if you want to lift anything heavier than .3's although the stock hop with the rubber square can lift .3's just lovely this time of year.