Armed Ops Tactical AR15 Quick Deploy System Micro Series Military Grade Flip Up Iron Sights Precision Machined from High Strength Aircraft Aluminum, Automatic Deployment Front and Rear Combo Set Flip up Backup Ar15 Flattop A2 Post Back up BUIS Iron Sight Picatinny & Weaver Mount AR-15 M4 M-4 M16 223 308