AIRLITE NI-138
1 3/4" diameter aperture

Features:

• Exclusive 20 inches of light gathering fiber optic
  
  
• Exclusive Duel track slide

• CNC machined aluminum components

• Exclusive 3 adjustable markers

• Single lock down knob

• Patent no. 6601308

Optional Accessories

• NI-036 Level

• NI-051B Blue Light

• NI-084 or 085 Lens Adapter

• Glass & Polycarbonate Lens 2X, 4X, & 6X

Instructions:
Changing the sight pin