Twod Gun Sight Laser Red Dot Quick Release for Gun Rifle Pistol P-i-c-at-i-n-n-y Mount Laser Sight can be easily and quickly mounted on a Weaver or Picatinny style rail with the knob Allen Keys provide easy adjustment of windage and elevation for the laser beam It fits most full and mid-size pistol rails.It makes your handgun more accurate with this setup Red Dot Laser delivers precision aiming for your pistol for unbeatable accuracy Compact Low Profile Pistol Red Laser Sight is the perfect accessory for home defense or sport shooting