I don’t know anything about monofiliar mags, so use at your own risk. The OEM cyma p90 mags fed perfectly fine too, and if memory is correct…it’s around the 60 70 bb capacity. You may not care too much about bb capacity now, but if you plan to use it for cqb…that double in capacity will be a big deal. The P90 is a very unnatural reload and would often take a bit longer than a M4 platform. In cqb it’s all about speed.
As far as your links:
-I don’t know the double bell, stick with the cyma, it’s tried and true (unfortunately it’s out of stock atm):
Taiwangun ➤ Electric replicas of submachine gun of Weapons ✔️ Wide selection of replicas from leading manufacturers at attractive prices 📦 US & EU Shipping 🚚
Their mags (also out of stock):
68rd Low-Cap Magazine for CM.060 [CYMA] - Fit to: CM.060, CM.060A, CM.060BLow-cap magazines must be prepared in particular way before first usage. Steps that must be made:* during first usage, magazine *MUST NOT* be fully loaded with bb`s,* before first usage, magazine *SHOULD* be oiled with...
I heard good things about the kings arm p90, but I never used it. It’s also over double the price…
But you get a quick change spring system.
-I use shs gears and shs motor (which should be very cheap on aliexpress at half the price, but it would take a few weeks to ship). However I don’t feel upgrades in this department would yield any massive results other than a slight rps bump.
-Maple Leaf MR…but the 60 degree, you won’t be high enough on the velocity for the 70 degree to make sense. At SP85 spring, I would even say go with the 50 degree one.
-I’m a fan of guarder springs…so…that’s a go
-I have guarder steel bushings too…so that’s a go as well
As an aside, I would upgrade the barrel after the bucking (I would say do it together), before diving into gearbox upgrades. PDI or Laylax barrel
As I mentioned before, if you plan to do A LOT of upgrades, consider just getting the krytac P90, it’s way more expensive yes…but after you price everything out, the krytac P90 is clearly better at the same cost
Krytac P90 reviews:
You mention epoxy and sanding as a feed fix. Do you have the source or what needs to be done? Out of a matter of pride I want to get the Cyma P90 working with MAG P90 mag. I know we had a long conversation about this in private, but I get so distracted with projects. Plus, I left the gearbox stock so I can test it with the Krytac mag so I know for future reference (such as this post). I’ll fully upgrade everything soon thought.
At this point I’m a little confused where the problem is:
Cyma P90: Mag P90 mag – feeding problems
Krytac P90 mag – feeds fine
Krytac P90: Mag P90 mag – feeds fine
Krytac P90 mag – feeds fine
In addition to this, the Cyma P90 feeds fine with the Mag P90 mag if the bb count is low (70bb). Which leads me to believe there is something about the interface between the Cyma P90 and the Mag P90 mag, what I found online about too strong a spring is true, or Krytac is just a more robust system.