SAI Small Arms Industries
The  SAI Shotgun Suppressor / Silencer is originally intended for use at  shooting ranges where the environment is disturbed by noise. The shooter  can easily wear hearing protection, but you cannot expect people living  next to shooting ranges to do so. Also, it is designed to protect the  shooter, bystanders and hunting dogs from hearing damages, and also to  disturb game as little as possible.
The SAI shotgun suppressor is  developed over a long period testing many different models and set ups.  The model SGS12 presented here, is developed having our mind on balance  of weight, size, effect, handling, price and mode of fit to gun, in  order to find the essence of a practical solution to a difficult  challenge.
Can be taken apart for cleaning
 
Caliber:           12 gauge, shot or slug. Subsonic and super sonic.
Gun type:        Use on single barrel, semi auto and pump action shotguns with removable chokes.
Baffels:           SAI pat. pend. 6-stage system and V-shaped baffels.
Fit  to gun: *)   Remove choke and fit suppressor using choke thread inside  barrel (pat.pend. mode of use). No need to make alterations to gun.
Sights:            Fixed sights can be used as normal, due to the build form.
Specifications: 
Lenght:                        330 mm ( extending barrel )
Diameter:                      50 mm
Weight:                        475 g
Material:                      Carbon fibre, steel and aluminium
Surface:                       Matt black, hard coat on metal surfaces