Excellent for 12-o'clock mount on sbr or ar pistol - Olight PL-2 Valkyrie Rail Mounted CREE XHP35 HI LED Weapon Lights

Like the other reviews have stated, it is indeed very bright (a bit too much for pistol use imo). Build quality seems excellent and stands up to AR recoil just fine (not a big ask). What I really like about this light is the position of its switches and their pressure function (hold for momentary and quick tap for constant). Absolutely perfect at the 12-o'clock position on the front of an 11" rail (12.5" barrel). Super easy to manipulate the pressure switches with either thumb so switching from strong side to support side poses no problems for light activation. The 12-o'clock position works great around barriers as you get no splash back from the light regardless of which shoulder you're shooting from (think 3-o'clock mount with gun on left shoulder clearing a doorway or wall corner). You also don't need to worry about light clearance when shooting over cover (e.g car hood) or through openings. Also very nice to not need an additional pressure switch or have to monkey with another light mount. My front BUIS is mounted directly behind the light and doesn't interfere with switch manipulation in the least. Light is pretty low profile and doesn't disrupt sight picture at all.