• Prevents damage from bb impacts!
• Fits all genuine and clone airsoft T1 red dot sights
• Also works with Holosun HS403A, HS403B and Vortex Crossfire red dot sight
• Has been tested to withstand 500fps sniper rifles at less than 10 feet

*Completely clean lens

Installation is quick and easy:

• Step 1 : remove protective film from lens protector
  
• Step 2: insert lens into ring cap.
• Step 3: see 2 grooves on the inside of the ring cap, carefully insert one o-ring in each groove (4 o-rings included in case you mess up)
• Step 4: Insert ring cap onto sight, fit should be firm and snug