The SBD22 Suppressor is Pewnitions Factory's answer to the .22 LR question. 
Made from 3D Printed Carbon Fiber Nylon. The SBD is a lightweight design that has excellent sound suppression. 
 
SPECIFICATIONS: 
Material: PA-6CF Carbon Fiber Nylon
Baffles: 5
Thread Pitch: 1/2"x 28
Weight: 4oz
Overall Length: 6.375"
Caliber Rated: .22 LR Only  *NOT Full Auto rated
 
*This design is inspired by the FTN and has been adapted. Anyone can print this at home with a form 1 and the proper equipment. If you wish to print your own, the file is linked here.
 
Recommended use:
This is a carbon fiber-reinforced nylon printed suppressor.  It is rated for .22 LR only on pistols or rifles using a reasonable firing schedule.  It is not full-auto rated.  Please allow a cool down period of 10 mins after aggressive firing (30-40 rds in under a minute) before resuming firing.
When installing the suppressor onto your firearm, rotate clockwise until it is snug.  There is no need to use any tools to tighten the suppressor.  Hand-tight is sufficient to keep the suppressor attached to the barrel.  Use care to not cross-thread the adapter when installing onto the barrel of your firearm.  Periodically check the tightness after installation when the firearm has been idle for 10 mins or more.
Do not attempt to handle the suppressor without hand protection.   It will be hot!