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)

"best gbbr rifle that i have ever shot i LOVE this thing it is so fun to use and the bolt is super smooth in my opinion the only thing that it just a little eh about it is the loading the mags i had at first was using just regular speed loaders with the gbb adapter but it became very finicky so i looked more for a better solution and i bought this 3-D printed speed loader price it attaches on the mag and it feeds your bbs in great i got it from COMRADEQUICHE AIRSOFT i would definitely recommend buying one of these for an amazing experience with your gbbr mk18.

"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.