"I ordered this using store credit from a big return.
This thing is an absolute beast, and the externals are rock solid. Be careful where you put your hand though, because when I slid my finger along the charging handle path, I got a pretty deep cut from the steel.
The externals, as I said, like all other owners of this rifle can vouch for, are rock solid. Nothing wobbles, and everything has perfect fitment. The trigger wobbled a little bit, maybe ~2mm, but I fixed that with a couple gear shims. Also, the externals we're lubricated perfectly for shipping, and the stock was fit extremely tight on the receiver. The only polymer parts being the pistol grip, hand guard, charging handle end, and stock, were all very strong and sturdy. If you're looking for an extremely sturdy, perfect dmr base like me, this is the perfect option.
The internals are nothing "premium", but they're definitely above average for a stock aeg. Nothing really needs to be upgraded and should push 200 foot shots no problem.
Gearbox shell- good build quality and finish, not radiused.
Cylinder head- aluminum with sorbo pad pre-installed (good AOE, but should be corrected,) double o- ring, great air seal.
Cylinder: ribbed and highly polished steel, good volume.
Air nozzle- strong polycarb with good air seal and an o-ring.
Piston- no removed teeth for AOE and will have to personally remove any teeth, full steel teeth, tooth strip is a tight fit in the piston, piston is a very strong and durable polymer.
Piston head- aluminum, steel ball bearing, great air seal and good porting.
Gear set- the gears are actually quite good and are a tough and low friction steel. The sector gear has a steel or aluminum delay chip. Shimming was ok, but you should double check yours. Ratio is probably close to 16:1.
AR latch- again, steel, and with a relatively strong spring.
9mm bearings- the steel bearings are tough and have low friction.
Trigger assembly- the trigger assembly seems high quality and showed no wear after a couple hundred shots.
Wiring- the wiring is 16g and seems to be very efficient.
Motor- the motor is sort of torquey, but it's not going to be pulling an m130 above 12 rps. The pinion gear is a steel D type, and the magnets are pretty strong, long type.
Cut off lever- I don't know the build material, but it's most likely steel as well.
Tappet plate- a strong and pretty flexible polycarb.
Selector plate- a strong polycarb.
Safety latch- a strong polycarb.
Spring- steel, irregular pitch, ~m115- m120.
Spring guide- steel, steel ball bearings.
Hop up- the hop up is very effective, strong and very durable polycarb, loud and audible adjustment clicks.
Hop up bucking- nothing out of the ordinary, good air seal, good bb contact, effective with the stock hop up unit, good material.
Hop up nub- nothing special, good even pressure, good material.
Inner barrel- 515 x 6.02mm, brass, pretty smooth and good trajectory, average size hop up window.
My personal upgrades:
Gearbox shell- stock, I radiused it and sanded down 4 nubs to make room for the Gate Titan's wires.
Cylinder assembly and air nozzle- Guarder M16A2 bore up set. (WILL WORK WITH LC3, BUT AIR NOZZLE IS WRONG LENGTH.)
Piston- Angel Custom Kratos piston with steel teeth, I partially sanded down the 3rd to last tooth.
Gear set- Laylax/ Prometheus High Seed Steel Gearset, I put the stock delay chip on the Prometheus sector gear.
Bushings- FLT 9mm steel bushings, kept original bearings on sector gear.
Trigger assembly- removed for Gate Titan.
Wiring- removed; Gate Titan includes wiring.
Motor- ASG Ulimate Upgrade U-35000 Long Type Motor.
Cut off lever- removed for Gate Titan.
Tappet plate- kept stock.
Selector plate- kept stock, slightly modified for FLT bushings.
Safety latch- removed for Gate Titan.
Spring- kept stock.
Spring guide- kept stock, I put an m4 screw in the spring guide with a washer on the gearbox to keep the spring guide steady.
Hop up- Prometheus Wide Use Rotary Hop Up, I had to modify it slightly by dremeling down the outer barrel guide arms to about 19mm long (from the back to the front.)
Hop up bucking- Modify Flathop Bucking
Hop up nub- Modify Flathop Nub
Inner barrel- Prometheus 509 x 6.03mm Stainless Steel Inner Barrel with Flathop Installed by Umbrella Armory.
Mosfet- Gate Titan, fit pretty easily in gearbox.
Sorbo pad- 1/32" 70d Neopad.