I sold mine to use the money on the PVS 14 I bought. The ND3 is a ncie bit of kit but to be homnest £300 is a lot for it. Mine was an ND3 Sub zero, however when scope mounted and in temps around 0 the laser did take a good 10 or so seconds to warm up to full brightness. I asked the manuafacturers about this and they said its to be expected.