M60/PKM hop-up chamber [EPeS AIRSOFT]

A good alternative to a stock hop unit (the only realistic option if you want to replace the stock one). Nicely machined but a bit pointless. I inserted a inner barrel with a Maple leaf rubber and the barrel moves a lot in the unit. The 4 screws for securing the barrel do their job, but the stock hop unit secures the barrel also without a problem. The shimms for regulating the depth of hop rubber lips are a nice feature. The rotary adjustment wheel is also nice, but the stock unit has that as well. The nub is still positioned vertically; the stock unit has a “omega” style nub in it (hard plastic). I tried installing a O-ring on the end of the unit that’s inserted into the gearbox but I couldn’t push it in (too big o-ring). So, if you have a M60 with the new style hop unit…. You don’t need this one. But if you have the old style with a vertical nub…. This is an upgrade