The Parker Hale PH16M is a precision aperture (peep) sight designed specifically for use on .22 caliber BSA rifles. This sight features an adjustable aperture for windage and elevation, making it highly accurate for target shooting and small-bore rifle competitions. Made of high-quality steel, it has a durable finish with Parker Hale's signature design for ease of attachment and reliable function. The “PH16M” designation indicates its compatibility with specific BSA models and precision engineering for marksmanship.