GHK Colt Licensed M4A1 SOPMOD Block 2 Gas Blowback Airsoft Rifle w/ EMG Daniel Defense RISII Rail by Cybergun (Length: 10.3" Mk18 MOD.1)

"Stock this airsoft gun is fantastic. When I received it i lubed up the gun and went to my local airsoft store to test the fps. It was shooting .2g green gas pretty hot(475fps).
Each mag i could get easy 2-3 bb refills on semi. Full auto mag and a halve.
The guts are all metal except the guts in the bolt.

My major gripe Is the hop up access is difficult. Have to take off bottom of rail to adjust.
also the stock buffer wears down over time

I highly recommend looking into bolt and buffer upgrades if you want to tinker with cycle speed ,fps, and recoil. With upgrades it will get expensive. If you do it will effect gas efficiency depending on bolt and buffer weight.

Finding upgrades and making sure they are in stock is difficult.

This is my first airsoft gun since 2007 and I am very happy with it. Been through at least 2000 rounds in my yard and it has been good so far.

"Best airsoft purchase I've ever made (and potentially the best purchase of anything in recent years).
Like so many others, I found myself on the infamous fence between a GHK m4 and the TM mws system. I'm certain that either would have been a great choice but in the end, the added realism of the GHK platform won me over. I've been away from airsoft as a whole for the past four years. I got away from it largely because there's virtually no airsoft community in my area of Michigan AND dealing with the inner workings of my aeg's was more like my days of rc car racing than any kind of milsim. Enter GBBRs. All I can say is "unbelievable". The satisfaction of a brisk recoil, the realistic number of rounds and the superb simplicity of the field stripping makes maintenance nearly as much fun as shooting. As mentioned by so many others, probably the only truly wonky bit of the mk18 is the stock but even that is negligible and you forget about its slop once you start firing. No BS, I'm hitting 50 cent sized targets 75% of the time at 50'+ with the stock inner barrel and no adjustment to the hop up whatsoever. At 100', it's a piece of cake to hit a 7" diameter target with a simple red dot sight with zero magnification. The gas efficiency is far better than I would have imagined. We're talking almost no discernable loss of performance in 35° weather (that's about 3° celsius, far lower than the recommended operating temp). Beyond the questionably sub-par stock, my only real concern with this little beasty are the mags. They're solid as a rock and super efficient but the 40 round capacity is a stretch, at best. Maybe it's because the 3 I bought are so new, they are just tight but so far the most I can get into them is maybe 26 rounds. When I bought it 3 weeks ago, I could barely get 12 in them so I'm hopeful that as I continue to use it, they will break in to the point of full or at least nearly full capacity. Almost 2500 rounds later in just a few weeks, the platform as a whole is just starting to truly break in and that, to me anyway, is a sign of true quality. I LOVE such tight tolerances. I highly recommend this rifle to anyone who is looking for realism, moderately few headaches and out of the box excellence.

"Perfect replica. I wanted an airsoft rifle for force-on-force training that would replicate my real rifle in every possible way. An AEG wouldn’t cut it because I wanted the trigger to be as responsive as the trigger in my real rifle, breaking the shot immediately, not a few milliseconds later after activating a gearbox. That meant basically any GBBR. What impressed me about the GHK version is that everything is... well, perfect. On the outside of the rifle, it is indistinguishable from a real rifle. Grab a magnet, and it is still indistinguishable. Every part of the rifle that is supposed to be steel is steel, including the barrel and bolt carrier group. Now break the rifle down. This is where GHK stands above all competition. It is still indistinguishable except on very close inspection. The trigger group looks like a real trigger group. The BCG looks real. It all feels real. It acts real.

The only things that are noticeable, on extremely close inspection, are that the bolt face is actually a hidden nozzle, there is a brass barrel inside the outer barrel, the bolt catch sticks slightly further into the mag well, and there is a small hammer that strikes the gas valve attached to the hammer. I am completely blown away. Functionally, the only thing that this rifle doesn’t do that my real rifle does is to eject the round in the chamber if I drop the magazine and pull back the charging handle. Considering that this is a limitation of airsoft and not of this particular design, I’m willing to overlook that.

The function of the rifle is flawless. I haven’t had a chance to hit a chronograph or out many rounds through it, but I will try to update this review after I have.

If you’re looking for the ultimate in realism and showroom quality, this is the rifle (or at least the brand) for you.

The only negatives so far:
The stock is loose and feels cheap. I’m replacing it with a Magpul CTR anyway, but it should be noted that this stock is garbage.
The flashhider is glued on, so after breaking it loose, you have to scrape hardened super glue out of the threads before you can attach a different muzzle device.
The fit and finish is phenomenal, but that means that you’ll need a punch to get the pins out. Don’t punch them further than they’re supposed to go because they are captive.
This rifle’s attention to detail and realism may make you feel inferior and undeserving of its awesomeness. Right away, you’ll start looking at throwing a working PEQ 15 on it, and there’s no end to that rabbit hole. I recommend throwing a coat of camo paint on it right away to show it who’s boss.