I am really impressed with this MP5. The weight and feel are everything I was hoping for when I finally committed to buying a CQB. I was happily surprised to find that the stock is rock-solid when extended even to it's maximum reach. The polymer lower assmbly, as on the "real" H&K, feels solid and sturdy. After installing a Magpul shorty vertical foregrip to the rail on the handguard, I noticed a small amount of play caused by the barrel shroud/battery compartment that it's attached to being secured a little loosely. The wobble is minimal though, and not a cause for much concern. I understand that most shooters probably wouldn't bother putting a VFG on an MP5 anyway. Just a personal preference.
Speaking of the battery compartment, much has been written in blogs and reviews about the small space available. I found that seating a battery (I've had good luck with the 9.6v, 1600 mAh NiMH nunchuck-style) can be a bit tricky, but once you get the basic idea (batteries to the sides of the handguard, wiring in the middle) it's really not that bad. I can replace batteries in about a minute now that I understand the concept.
The biggest letdown was the supposedly quick-detach flash hider. After numerous attempts, I could not get it to fit over the orange-painted small barrel and 3-lug adaptor without not only damaging the paint but also causing significant worry that I may damage some metal parts. The close tolerances pre-paint cause it to be nigh-impossible to install the flash-hider with the heavy orange paint (I'm guessing that's why it didn't come pre-installed in the box). To circumvent this problem, I simply stripped all of the paint on the barrel tip and 3 lugs down to bare metal. Now, both the flash hider and my new, ultra-sexy, Gemtech Raptor II suppressor fit perfectly, with no wobble.
Overall, I'd highly recommend this gun not only for CQB, but also for a light and compact field weapon capable of accurate shots at both short and medium distances. I've skirmished with it 3 times now, and it has quickly become one of my two favorite guns.
*Solid build quality and feel
*Surprising accuracy for such a short barrel
*Nice H&K trademarks and markings
*The MP5 slap!
*Compact size for CQB
*Orange paint on barrel tip and 3-lug adaptor prevents proper installation of orange-tipped flash hider
*Handguard not rock-solid, causing rail-attached equipment to wobble slightly
*Somewhat tricky battery installation
Rating: [5 of 5 Stars!]