i have a dm8, pm7 and a newer dm14.
All are spool valve using virtually the same bolt (minor tweaks aside) the biggest issue for me coming back into the game was the fire modes, the older guns tend not to have the newer 10.5 bps cap or a method of achieving it without either a software flash or a new board.
A new board however has made my pm7 and dm8 as useful, reliable and near as dammit efficient as my dm14 for a fraction of the cost.
For my money i would buy an older high end that still has manufacturer support/spares available and that has either got the capability to be set at or has an aftermarket board. I chose Dye as the bolts still use the same o'rings, eye pipes etc from years ago and are easily found.
recently a friend picked up a dm9 with tadao board for £120, fantastic bargain of a gun compared to a newer but more basic pmr/gtek.
All are spool valve using virtually the same bolt (minor tweaks aside) the biggest issue for me coming back into the game was the fire modes, the older guns tend not to have the newer 10.5 bps cap or a method of achieving it without either a software flash or a new board.
A new board however has made my pm7 and dm8 as useful, reliable and near as dammit efficient as my dm14 for a fraction of the cost.
For my money i would buy an older high end that still has manufacturer support/spares available and that has either got the capability to be set at or has an aftermarket board. I chose Dye as the bolts still use the same o'rings, eye pipes etc from years ago and are easily found.
recently a friend picked up a dm9 with tadao board for £120, fantastic bargain of a gun compared to a newer but more basic pmr/gtek.