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The 870 upgrade that changes everything
high-impact polymer construction handles duty conditions without complaint
5–4 lb — tune both character and weight
set the weight
Magpul MBUS 3 Sight - Rear - MAG1167 Colour:Olive Drab Green The 870 upgrade that changesDual apertures, constant tension deployment and tool less windage the MBUS 3 Rear is the smartest polymer backup sight made. The Magpul MBUS 3 Rear Sight (MAG1167) pairs the classic dual aperture combat configuration a large ring for speed, a small aperture for precision with third generation refinements throughout. The strengthened housing resists crush and impact, the slimmed profile stays out of the way of optics and hands, and the constant tension