AR15 Forward Extension Spacer (fits QRP2/TNP/LRP) Air Purifiers The weatherproof case makes this

The weatherproof case makes this kit ideal to be on a jobsite while keeping the contents protected from dirt and debris

The CompM4 has a top-mounted battery compartment while the CompM4s has a low battery compartment - this is the only difference between the sights

ANSI/ESD S20

Steel Clip Mount

- Features 12" take-up adjustment range

AR15 Forward Extension Spacer (fits QRP2/TNP/LRP) Air Purifiers The weatherproof case makes thisSpacer for CompM4, CompM3 and PRO in conjunction with Base and Top Ring, Item No. 12194. Mount raises height of optical axis from 30 to 39 mm and brings sight 40 mm forwards. Screws and Allen key included.