I just fitted a photon xt 6.5x50 with doubler on the HMR, I haven't zeroed it yet, had to be back, but I got a little bit of footage of some rabbits with and without the doubler fitted, around 10pm tonight just gone dark, no IR used. I must be honest they are excellent with doubler and rock solid fitting, this will be getting left on the HMR now, for the money they are very good. I'll post some more footage at the weekend with IR and dropping some rabbits, the mag range, together with how light and low profile it is, makes it a winner. Like I say the only downside is there not great in daytime