Flip-up sight spring fatigue: warning signs

View FBUIS-B on Amazon

• Sight will not stay upright under light bump
• Slow or gritty flip after cleaning
• Asymmetric front vs rear snap on a matched set

If detents fail, do not trust the set as a backup—replace. New FBUIS-B units ship spring-loaded per listing.

• Model FBUIS-B · aircraft-grade aluminum matched front & rear flip-up pair
• Picatinny mount · hex screwdriver included
• Spring-loaded · dual rear apertures · windage/elevation dials
• Listed set weight 3.84 oz · ASIN B01AISP1KW · UPC 784672554763
• Seller Ozark Mountain Supplies (FBA) · lifetime guarantee noted on listing

Buy Ozark Armament Flip Up Iron Sights (FBUIS-B) on Amazon

Specs from the public Amazon listing for ASIN B01AISP1KW only. No false claims.