Bought this as boneyard from here a while ago came with a cracked gearbox case which I have since replaced 

This is a TM Hk51, they made 2000 of these back in 1998 (and I still have one original one for myself) 

Unfortunately this came with the wrong lower, not sure if the previous owner or whoever had change the lower out but it should be black, the one that came to me was grey so I have since replaced that with an SEF black lower which is not originally correct but at least its black, I will throw in the grey one it came with but to be 100% original it needs a black 0/1/20 lower which you just cannot find, it's literally just the color difference, the lowers for the G3 AEG's are all the same, this doesn't effect how it works, just the the Hk51 came in all black with that distinctive rare front end 

As I've changed the gearbox shell from the 24 year old TM one it now has a black SB gearbox shell so I've also upped the spring to an M105 which has brought the power up to 330fps on a 0.20g BB, it cycles fine but I think it could benefit from a high torque motor 

Comes with 5x Metal high caps and an original TM scope mount 

Rear wired to dead with the fuse line left in 

£160, postage included