Flagaway&reg; Tactical Micro Low profile Precision Machined Anodized Aluminum Automatic Deploy Weaver Picatinny Rail Rifle Shotgun Front And Rear Combo Set Flip Up BUIS Backup A2 Post Back Up Iron Sights 20mm Mount Military quality push button automatic deploy flip-up front and rear sight towers complete with A2 square post assembly with locking retention and precision elevation adjustments for greater accuracy. Mounting Decks designed to be used with handguard & Flattop rails and both will fit all 7/8" Picatinny/Weaver style rails. QD Automatic Flip Up Deploy Button Release At The Push Of A Finger And Locks In Place When Deployed Or Folded. Easy Quick And Secure Installation -Allen Screw Locking Clamp Rail Base Retention For Maintaning Zero Under Heavy Conditions. Material : Anodized Aluminum Finish. Front Sight: Weight: 1.5 oz Height: 1.7" Width: 1.5" Length: 1"/ Rear Sight: Weight: 1.9 oz Height: 1.74" Width: 1.5" Length: 1".