First of all, the best caliber for sound suppression is .45 because the round is almost subsonic at 900 fps or so, and with subsonic .45 round, all you hear is the slide action and champaign bottle "pop", there is no sonic boom to worry about. There is a reason why SOCOM demanded a suppressible offensive handgun in .45 caliber that is accurate up to 100 yards.
Regular 9 mm cannot be fully suppressed because of the sonic boom, and if you use subsonic 9 mm, the ballistic is simple aweful because you have a small projectile going at less than 900 fps. Yes, Holywood shows a lot of suppressed beretta and glocks, but in reality, 9mm is not good for suppression.
The best platform for suppression is a fixed barrel setup like Walther ppk or makarov PM. The next best platform is HK SOCOM and HK USP tactical, which is designed to function flawlessly with SUBSONIC .45 rounds... If you use regular .45 loads, you will have stove-piping and failure to return to battery in a HK USP.
Also Jarvis will make a threaded bull barrel for 1911 series, which will take the Gemtech USP suppressor, and with subsonic .45 ammo, it also would function flawlessly. Subsonic ammo powder burns faster because of a larger primer hole, which allows a more powerful recoil thrust allowing the 1911 locking mechanism to disengage and eject and chamber next round. Slower burning regular ammo powder does not have such a strong recoil for reliable cycling.
- Retro