I got a Camp 9 at a local gun show that was in nice condition but I felt it needed a few tweaks. I asked the seller if it had the original buffer in it and he said yes and it shoots real well. I put in a new Blackjack buffer and 16 pound spring from the Blackjack folks. On dis-assembly I found the buffer had started to crack apart. I had also put a new buffer in my 922M I had bought earlier for my prairie dog hunt. I want to put a fibre optics sight on the muzzle end and keep the aft sight as is. My question is what is the best color to use, green or red or something else? I don't have any color blind issues.