[m21sniper]

I would definitely use my AR(carbine) for CQB. It has far less over-penetration risk indoors than pistol ammo does. And Mk262 Mod 1 ammo is extremely lethal...far more so than pretty much any pistol round.

If you have a green laser you don't need a light, the laser will light up a room by itself. I personally would not light it up until i was ready to expose my position(probably to shoot) though.

You can get a good red laser for 100 bucks, and they are certainly quite capable of holding a 50 meter or closer zero. For green, you're gonna have to spend a lot more.

The one i got for $100 held it's zero just fine, it just had a problem where the beam got real dim for a few seconds for no apparent reason, and then bright again.

I tried cleaning the contacts, new batteries, etc. No good. Sent it back.