Lambda Defence B&T Licensed GHM9-C Gen 2 Gas Blowback Airsoft SMG
(Color: Black)

"This SMG is pretty awesome with great FPS for indoor and great bb capacity and gas efficiency. A ton of fun and very accurate.

Would reocmmend.

"Not a bad gun until you notice the issues with it.

The nozzle stop is probably the biggest point of failure with this gun. The nozzle stop unfortunately stops the nozzle too early to vent residual gas left inside the nozzle, so you end up with a lower fire rate and can potentially lead to breaking your nozzle. To my knowledge this is both a problem with the G and the C. Fortunately you can just shave the nozzle stop down about half and inch and you fix this problem, however, done incorrectly and you break you're nozzle, I know from experience. You can also 3D print one with a model someone made on thingiverse.

The return springs are also not very good so you can get a generic 0.6x6mm 300(ish)mm compression spring on amazon and cut it in half and be done with it, or you can buy two and cut them a couple mm longer for a stronger return, but it's up to you.

The stock barrel is polycarbonate, as well as the threads, so getting the longer barrel and rail is a go to first purchase for this gun. The barrel is also loose, like too loose, so the whole hopup assembly ends up wobbling inside the gun, so there's that.

From what I know there's only two types of mags that actually works for this gun, and that's the Raptor mags and the KWA KMP9 mags. The raptor mags aren't bad, but they don't hold 48 rounds like they says it does, and they get cold really fast, but they come with the rubber cover which is nice. The KWA are probably is the best option considering they don't get cold too fast like the raptor ones and they actually hold 48 rounds.

The trigger pull is also really strong, not sure how you fix that, but I know there's a tutorial on youtube for it.

The gun itself isn't bad, it's definitely a fun first GBBR, but fixing these problems early on will definitely be the best move. Most of the issues related to the gun have to do with the Upper Receiver, which are exactly the same except for the nozzle, and the heavy trigger pull. So the only issues that the C has that it doesn't share with the G is the mags. So since you're going to have to fix these issues in the future anyway, I would just cut out one of those issues and get the Glock variant instead.