KWA QRF Pistol Caliber AR w/ Adjustable FPS AEG 2.5 Gearbox (Model: MOD.2)

"Solid build quality and a great first gun if you want to modify it. Needs a new fuse or mosfet if you're running 11.1v lipo or else the fuse will likely blow. Gate Titan is drop-in, but I suggest you thread the mounting screw hole with one of the trigger board screws as it makes it easier to drop in. MAXX and Speed triggers drop in without any additional work. The 2.5 gearbox helps as it makes the gun indoor and outdoors viable with the adjustable fps. Currently, my MOD 2 shoots at 30 rps at 350 fps with new gears motor in addition to the mods listed above. With a little fine-tuning on your end, you too are able to shred on the field any day of the week.

"Ight so it's a pretty good gun, the information is all accurate about the gun. Has a fairly high rate of fire but it seems to hold more rounds than what's listed.
The mag is kind of loose in the mag well, but that seems intentional as there a couple mm of gap. I wish the hop up had more range, but over all to teir gun.

"For reference: I'm an Infantry Vet. I will break anything that isn't well made and detest it the whole time I'm breaking it. Right out of the box, the externals of this QRF have that high quality, attention to detail, real steel, right color, right finish, right feel in the hands type of appearance and tactile quality. The quick-change and adjustable spring innovation is well thought out, and well executed. It's easy to access and change out the spring, taking only minutes without the need to disassemble most of the rear end of the gun. Or, even less time to simply turn the spring guide adjustment with a tool to fine tune FPS. The brilliance of the gearbox design incorporates many things we 'builders' have hoped a company would do, such as putting a notch in the bottom of the gearbox to allow the ambi selector shaft to remain intact when removing the gearbox. The internal parts themselves are simple and robust, as has always been the case with KWA; there was good air seal and performance out of the stock gun without the need to buy it a new wardrobe. However, if you feel that overkill is underrated (I do) and want to upgrade, the gearbox is completely V2 compatible with the exception of the proprietary nozzle, but fortunately it's an excellent nozzle with an o-ring and good seal. I replaced the barrel, Hop Up bucking, the type 0 cylinder to a type 1, the piston and head, and an SHS high torque motor. Cylinder head was sorboed and I re-wired with a Gate AAB mosfet, which fit fine in the battery compartment along with a Matrix 1400mah 11.1v brick lipo mentioned in the product page video by the lovely Matt. The KWA Mod 1 mags feed perfectly and keep up with the resulting high rate of fire of this build. With the stock spring, mine is shooting 1.35 joules, a very respectable FPS for such a short and maneuverable gun. With the stock hop up, a modify soft flat bucking and a 10 1/2" custom 6.03 barrel (stock barrel is about 9" long- I added a small barrel extension), I'm easily hitting the gong at 125 feet. The bolt hold back function to access the rotary style hop works well and is cleanly released by the 'bolt release' button. The sliding buttstock adjustment is solid and smooth, although it takes a moment to get used to the unique design of the release mechanism. The m-lock rail is good looking and solid and feels good in the hand. My only meh on this gun would be the grip. The forward tilting modern pistol grip design of the QRF feels good ergonomically and looks sexy, but doesn't allow wires to be easily fed through the rear hole, the preferred route for mosfet-built guns. The motor is pressed up against the back of the grip and is in the way. I solved this by running both wires through the front hole, which is difficult but worked. All in all, this is one of my new favorites. It's good looking, feels good ergonomically, took so easily to modification I know it will be completely dependable on the field, and best of all, fits under your pillow. If you're itching to fill that PDW niche, get one. Good job on this one, KWA.