M1SURPLUS Quick Deploy 45 Degree Flip-Up Offset Front + Rear BUIS Aiming Sights Fits Weaver/Picatinny M1SURPLUS Tactical Quick Deploy 45 Degree Offset Backup Aiming Sights Fits most Weaver / Picatinny style rails. Quick deploy capability with push button locking mechanism Offset Mount Allows For Quick and Accurate backup aiming by just rolling your rifle on your cheek slightly and pepping the sights Made From 6061 Aircraft Grade Machined Aluminum With Steel Aiming Posts and Durable Anodized Matte Black Finish This item cannot be exported