Slightly narrow entrance for better sealing to achieve more consistent power output. - C-Clip to enhance lip stiffness for further sealing.

Special pressure point geometry for improved long range performance - Suitable for Marui / WE / KJ GBB Pistols, WE GBBRs, VSR-10 compatible Air Cocking Rifles & Novritsch SSG10.

NOTE: Due to special pressure point geometry, this product is optimized for use with inner barrels with open type hop up slot. ( i.e. Marui original pistol inner barrel and most compatible inner barrels )

Recommended hardness/FPS combinations:

• 50 degree: Up to 360 FPS
• 60 degree: 295-390 FPS
• 70 degree: 360-460 FPS
• 75 degree: 425-490 FPS 80 degree: 490 FPS up