Suppressor Ready Kept Simple. The simple and accurate blowback design of the Buckmark pistol has remained fundamentally unaltered for over three decades. Adding 1/2-28 threads to the muzzle of a Buckmark isn’t a huge change the design of the pistol, but it will fundamentally alter your experience when you legally add a rimfire suppressor. Teaching the next generation of shooters is a lot more fun when you aren’t busy readjusting ear muffs and you aren’t required to yell your instructions so they can be heard.