Anyone interested in a trade for a gbbr or something hpa if it’s different not an m4, has F2 engine, has a maple leaf barrel and also come with a shorter pdi one, max hop unit and also a different max hop unit that’s in a box, cannot remember for the life of me what hop rubber is in but will be a maple leaf of some variety, i do have a spare hop rubber knocking about too, comes with the hex suppressor,  it’s locked to semi at the min as I was using it places like goal and killhouse, it’s half metal half polymer body.