ICS MK5A5. I've had it for several months now and I really think this was a pretty good deal. ICS is known for making good quality MK5 models and this is a nice example. Feels great, nice and sleek, and mostly solid... Mostly, but not completely. There are some minor issues though, mainly with some loose screws, but if you have a nice set of various sizes of screwdrivers, you can correct these issues on your own and have absolutely no problem afterward.
This gun will only accept mini batteries due to the tiny size of the handguard... even an 8.4v mini NiMH will barely fit. I wouldn't attempt to put in a 9.6v mini NiMH battery since it has more cells than an 8.4v mini NiMH and is therefore larger. At first the battery might seem like a pain to get in, but with a bit of practice you should be able to get it in consistently. When putting in the mini battery, ensure that the end that the wires come out of points FORWARD, since it's significantly easier to put it in that way. If you put the battery in correctly, then the handguard should be able to slide into place with no resistance once it gets aligned properly.
I have not attempted a LiPo battery, so I don't know how that would fit.
-Nice and sleek looking, though all MK5 guns without front rails are nice and sleek looking, so that isn't exactly particular to the gun. It helps though.
-Feels very nice and comfortable to hold.
-Compact and lightweight.
-Functional Cocking Lever; for H&K slapping, making yourself look tacticool and BA, and the awesome sound it makes, though not really useful for much else since there is no imitation bolt to pull back. The cocking lever has a very smooth motion and will take quite a bit of abuse. It will stand up to quite a bit of H&K slapping and won't physically snap apart; HOWEVER, see below for its con.
-Retractable 3-Position Stock; there is a slight wiggle but it doesn't affect the gun's performance or the aiming. It's not really annoying at all, since if you have the gun properly shouldered then it won't wiggle one bit. I don't mind that it only has 3 positions since I only ever use the fully extended setting, but I guess this one is up to personal preference. Keep in mind though that the second position is only a couple of inches longer than the fully-in position.
-The iron sights are very nicely made, easy to use, easy to line up due to the concentric circle design, and very well built. The rear sight is extremely solid, and the different apertures rotate and click into place very firmly. The sight is adjustable via screwdriver for windage, though I'm not sure if you can adjust the elevation. There is virtually no difference between the different apertures though, but that's totally acceptable for airsoft purposes. If iron sights aren't your thing, then you can add an MK5 rail mount to the top for optics.
-Full metal, which means that everything that is supposed to be metal is made of metal. That does not include the lower receiver or the handguard, both of which are supposed to be polymer anyway. Makes perfect sense.
-Bullet style selector markings, which I personally think are cool. They're not just painted/printed on either, they're actually physically molded into the polymer receiver. Awesome.
-Perfect for CQB since it shoots at a good 330 or so FPS, and it's pretty much guaranteed that it won't shoot hot unless you upgrade the spring... but that pretty much defeats the purpose and CQB role of this gun so I don't know why you would bother trying if you want to play CQB with this.
-Comes with 2 hicap magazines. Useful and a good capacity, though I personally prefer midcaps. I use the hicaps as spares.
-Comes with 1000 good quality ICS 0.2g BBs. Unlike a lot of other companies that will give you crap BBs with their guns, these BBs are not bad at all and are totally usable, so don't be afraid to use them. They will only misfeed if you haven't lubed your magazines, which you should be doing anyway.
-Comes with a pour bottle; very very extremely nice and convenient for filling up both hicaps, and speedloaders for midcaps/lowcaps. Just use the bottle to scoop up BBs from a bag and pour using the nozzle. Quick and efficient.
-Relatively Affordable; compared to many other guns, at $215 this is a very nice deal. Plus, if you have an ASGI coupon code, it'll cost you even less, and you'll get free shipping. ASGI FTW.
1. The mag release button is quite difficult to press since the spring is pretty strong, and it's too far forward to be of any practical use unless your shooting hand has long fingers. HOWEVER, this is more of an ergonomics issue with the real MP5's design, so don't blame this particular gun for that. You can always use the mag release lever in front of the trigger guard with your non-shooting hand anyway, so this isn't really an issue, just a nitpick.
2. There are no increments for the hopup adjustment, although this could actually be a pro if you really want to fine-tune the hopup.
3. Range isn't exactly the furthest, but what do you expect from a CQB gun? It does exactly what it's supposed to do for its role. Not an issue unless you plan on attempting to go sniping with this thing.
4. The flash hider is an obnoxiously large and orange plastic, but hey, following the law requires some responsibility. If it really annoys you that much (and if you don't plan on taking it out in public, which you really shouldn't be doing), it can be replaced as long as you have the correct size allen wrench (very small, not sure of the exact size). Just remove the tiny screw below the flash hider and you should be able to replace it yourself if you want. Doing so could also allow for the ability to attach a barrel extension to add additional range, should you really want or need it.
5. There are some minor issues with the gun's solidity. For example:
-The finish can scratch if you abuse it. It's not really too noticeable though if you don't scratch it intentionally.
-The fire selector on mine was a bit loose out of the box. This caused my full auto shots to wiggle the selector switch to almost semi, and I had to kind of guess by touch where to place the switch when I wanted semi auto. It eventually fell off after a few long months of abuse and I had to put it on again, but nothing that a small screwdriver couldn't fix. No biggie, just don't lose the screw and you're fine. Once I put it back on and tightened it though, it worked like a charm, better than it came... and I no longer had to guess where to put the switch for semi auto since it started to give a crisp feedback after I tightened it.
-The screw that holds the mag release mechanism in place was slightly loose, which prevented the magazines from being held as tightly as they should have been in the magwell. It worked fine after I tightened the screw though, just like the selector switch, and I had no issues afterwards.
-As I mentioned before in the Pros, the cocking lever is solid and won't physically snap apart on you. HOWEVER, the screw that holds it in place CAN pop out eventually. If this happens, the cocking lever will fly off and the spring will snap forward all the way. This will require you to re-compress the cocking tube spring in order to put the lever back in, ASSUMING that you know where the screw flew off to. This is not an issue if you can find the screw, but when this happened to me, I couldn't figure out where the screw flew off to since it's pretty tiny. If you do lose it but happen to find a correctly-sized replacement screw, you should be able to put the lever back in with no problem, since the cocking lever itself probably won't physically snap in two or anything. If your cocking tube assembly does happen to somehow catastrophically fail (it really shouldn't since the only weak link is the screw, which is replaceable) ASGI does happen to sell replacement ICS front cocking tube assemblies for MK5 models. Just search for it on the website.
All of the notable issues here are simply issues with a bit of screw tightening. If you own a decent set of screwdrivers, all of these issues can be easily rectified; just tighten the screws up a bit. That's why I didn't bother taking off a star for this, since they're easily solvable by yourself. If you're lazy and don't want to even touch a set of tools ever in your life, then maybe that would be a different story. However, I'm only one person out of many and it's completely possible that the screws in my gun were just the result of a minor one-time manufacturing slip-up. I don't know if anyone else has encountered these particular issues with this gun.