FG-Airsoft sent in news about their new LFS rings that they claim will give you stable FPS values... "We are very proud to introduce our new LFS rings (Low Flow System). These rings are compatible with both VFC and WE Open Bolt GBBR Platforms.  There are 3 versions available, each one reduces the velocity by approx.: -10, -15, or -20%.

Installation is easy and reversible, this system will not add any cool down and most importantly provides very stable FPS values.

• LFS 1 Reference 50015: 20% FPS decrease (approx.)
• LFS 2 Reference 50078: 15% FPS decrease (approx.)
• LFS 3 Reference 50016: 10% FPS decrease (approx.)
• LFS 4 Reference 50017 : 3 LFS ring pack, reduces velocity of 10, 15, or 20% (approx.)

Testing and installation tutorial video for WE nozzle:

Testing and installation tutorial video for VFC nozzle:

Best regards,

François
FG-AIRSOFT
www.fg-airsoft.com"