![]() On the other hand, the 113-gr Sellier & Bellot TC FMJ produced the loudest noise of 113 dB without a silencer. This was achieved with the GECO FMJ TC (157 grs). With subsonic ammo, we were able to reduce the shot noise with silencer to the quietest value of 85 dB. Depending on the tested load, between 1.96”/50 and 2.75”/70 millimeters. ![]() The suppressor a lways caused a shift in the point of impact. An early example from the Vietnam War was the Smith & Wesson Model 39, which was supplied to the US Navy Seals as the MK 22 with a slide lock – but this pistol became a single-shot gun. A quicker way to reload is to place a catch between the slide and the grip, which is manually operated like a safety. The tinkering with the cable tie creates a single shot gun. The sound with the slide blocked and with unprotected ears is more reminiscent of a short, high whistling sound than a "bang." The whistling sound probably comes from the highly compressed gases exiting the suppressor with the bullet. The gun shoots more quietly with the slide locked by cable ties. The measuring device was placed one meter away at a right angle to the muzzle. We determined about 73 dB for the slide noise only. Under hearing protection, the slide noise seems louder than the shot itself. In addition to the acoustic ones, the differences in kinetic impulses when shooting also stand out, i.e. Without slide noise is significantly lower. Up! Not pretty and not functional, but test-locked M9A3 slide.
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