I've decided to sell the nitesite rtek viper, I've give it 6months and I can't get on with it, cannot get use to the shooting position needed to use it, it's a shame as it's a great tool for rats, rabbits at airgun ranges, so the decision is what to go for to replace the rtek... I've got two in mind but both a lot dearer than the rtek, one is the atn 4k pro or the pulsar n355, n355 is probably the better model out of the two but is it worth the Xtra few £100 more for what I,ll be using it for as I dont have lots or permissions and it's more of a past-time than full on pest control....