The two kits were awesome and the mags work great!
This kit along with the other internals kit, (plus other upgrades like, spring, o-rings, reinforced stock/grip, etc.) can turn a nexus pro into a heavy hitting dmr/sniper blaster.
Like others have said, the plunger tube and telescoping pusher tubes can be alittle annoying to seal. The worker plunger tube is slightly larger than stock, so the original plunger o-ring wont give a consistent seal. The best solutions I found after some trial and error was to just use slightly larger o-rings on the plunger and telescoping tubes with a thin layer of ptfe tape under the plunger o-ring. And a generous lubing with a good quality silicone grease like super lube. Then finally, after adding a blowout guard my nexus has been 100% consistent and reliable. For o-rings, get the metric and standard large o-ring assortments from Harbor Freight. With those 2 you'll probably be covered for any other future projects.
Solid kit for the most part. Except for the recurring theme I keep seeing about the plunger tube being just a little too big. I mean you can tape it up but for the money it cost it should be snug...other than that, great kit
Great product and great service
got both metal upgrades, the only two problems. since the original plunger is about 2 - 3mm smaller than the tube, I had to wrap the plunger head with teflon then reinstall the oring to get a decent seal. The other problem was more telling, for some reason (i don't know what it's called" the small conical part that connects the push rod and the plunger tube, wouldn't seal at all. I actually had reduced fps compared with a stronger spring. I replaced it with the original orange bit and got about 220 to 250 fps. I've since been told that before you put the orings on you need to again wrap some teflon around the ring seats and then put the orings on. Either that or get slight larger orings. other than those two tweaks, this was a great upgrade.