Cybergun Colt Licensed CAR-15 Model 607 Airsoft AEG Rifle by G&P

"TLDR; Good externals, with a few quirks. Probably the best option for the 607. Basic hop, but it performs well. Standard internals that don't beg to be replaced, but a few parts could stand to be updated.

I got this specific one because there aren't many other options. I could do a metal one without trades, a polymer one with trades, or this G&P one. The alternative is the much-more-expensive route of buying multiple parts to Frankenstein one together. I had a hard time finding furniture on hand, so it'd result in my buying one of those other guns anyway, just for the furniture.
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EXTERNALS.
G&P's usually take 14mm POSITIVE threads. Ares is the only other brand (that I know of) that heavily uses this. Other brands have guns that use 14mm+, but it depends on the models. Would be cool if they didn't.
I also don't like that G&P never had "functional" dust covers. The nub on the dust cover always interferes with the mock bolt. Last M4 I tried, a new dust cover alone didn't work. Perhaps it is possible to change both the mock bolt and the dust cover so it can stay shut?
Not all G&Ps use weird pins, but this one does - the front pin is THREE pieces all shoved into the receiver hole and screwed together. Each has an angle cut on them so that when you screw them together, it squeezes the middle part out, forcing tension on the receiver holes. Why? Why couldn't they have just made good receiver pins instead of relying on that method to force a tight fit of upper and lower receivers? Some use actual pins, some use screwed-in pins, and they can work!
They also don't ever seem to really utilize bolt catches. Since they don't use a bolt catch, they also opt to use a spring on the bottom of the mock bolt catch, which is accurate to my real AR, but it presses against the receiver. You know, the AIRSOFT receiver that doesn't have the same quality of finish as my real gun? You can even see in the Evike picture that the upper has a small scratch along the upper from the mock bolt. I'd be fine if it had wear from a part that gets used, but this thing is purely cosmetic. So when you adjust the hop, you have to hold the charging handle back with one hand while adjusting it with the other.

However... the engravings and feel of the gun are (as is usual IMO for G&P) nice. The body feels good and the plastic they use doesn't flex or make sounds. The handguard halves fit together nicely. Other than the most annoying quirks of not being able to lock the bolt back, not being able to close the dust cover, and being limited to 14mm+, the externals are great on this. I have faith that I'm much happier with the feel of this than the feel of my 2 other options.
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INTERNALS.
Alright, so the price is probably higher on this for the licensing and the niche externals. I understand that. However, most G&P rifles I've owned, not all being licensed and not all having niche furniture, seem a tad outdated. CYMA Platinums really gave a new bar for guns these days, IMO. You can even get those with Colr trademarks!
With this, which is quite similar to my other guns from them, you get a polymer piston with 3 metal teeth, a rudimentary piston head (BUT in their defense, the o-ring on it gives a good air seal), an AL cylinder head, standard brass cylinder (mine was unported which is incorrect for such a short gun), an AL nozzle with o-ring (that doesn't make a great air-seal, unfortunately), a very basic trigger unit without any MOSFET, basic quality 18:1 gears, standard poly tappet plate, standard 8mm bearings, and a non-QCS spring guide with a metal ring to act as a cheap "bearing." Oh, also mine came with a 150 motor. I can't say it's a bad motor, but I threw in an ETU (which uses standard motor pins instead of the screw-on that G&P uses) and a ZCI motor which is still (IMO) a better motor.
Overall, nothing that causes great concern for me, but also just seems outdated. Not even a basic in-line MOSFET that other brands have switched to stay competitive? I am happy that the air seal is good. One good thing I must say is the hop is more effective than I would have expected. It's a standard mound with a standard round nub. However, at 100ft, I was able to hit a 12"x12" square with 0.3g BBs with minimal need to arc my shots.

"I got this airsoft gun, it's great and i always wanted an old school AR replica. but I can't close the dust cover because there is this big thing in the way. Unless that in on purpose.