As much as l like it, l will reduce my collection. I am an MP5 fan, had them all.
This is made by G&G, steel body not pot metal or plastic,with thick stock slide rails (most of the other brands made them thin).
I am the 3rd owner, the previous ones modified it. You can slap it as you like as is steel. The hopup can be accessed by opening the bolt door with the finger and slide it back. Internals are stock with a maple leaf hopup bucking. 
Comes with a top rail mount, 3 hicaps (2 of them have lost the small door but u can use it puting a tape after u load your bbs) and 1 midcap, a classic handguard and a railed one, no battery. Will be sending u a video proof in working condition if interested. Not perfect for the perfectionists but good to go.
Price doesn't include P&P. ( About £15)