Sightmark Ultra Shot M-Spec FMS Reflex Sight COSTA #2 it may not be as

it may not be as durable as a Japanese or Taiwanese Airsoft Rifle

Unlimited field of view

This M870 installed a medium barrel with the mormal shell tube and the fixed stock which have a realistic outlook of the classic M870

Steel Slide with P-Processing  Real Type Slide Mount

magwell and lower frame) can attach on the rear stock

Sightmark Ultra Shot M-Spec FMS Reflex Sight COSTA #2 it may not be asFixed mount design fits weaver picatinny rails Advanced, true color anti reflective lens coating improves low light and night vision performance Motion sensing auto on feature Cast magnesium alloy housing with protective shield IP68 Waterproof rating submergible to 40ft Low power consumption Digital switch controls Variable reticle brightness with night vision modes Interlok? internal locking system Scratchproof lenses Lightweight Shockproof (. 50cal)