I was on the fence with the purchase of a front clip on between a CNVD-LR, PVS-22 and PVS-27. They're different price points (and intended uses), but it's tough to swallow spending a minimum of $8,000 on a device I use infrequently. I ended up buying a 30 SNR Pinnacle-tubed CO-LR from Delta 4-3, and have never looked back. My unit was half the price of most of the ones I've listed, and it truly has to be seen to be believed. When I say that the CO-LR is one of the best values in clip-on night vision, I truly mean it!