I was down to choosing between the Matrix and the Cosmic sight and I guess these 43 year old eyes just needed the extra light that the Cosmic offered. I purchased the battery operated light and looking back I wonder why. I haven't needed it yet. Granted, you do have to adjust the slide which you don't with the Matrix but the 'pin' is just so much brighter. Also, I was concerned that there may be a halo effect but as of yet I haven't noticed it. Seems to be well built enough too, not as tough as some I've seen but it should suffice.