Check the listing for details. 45 Degree Offset Micro Flip Up Rapid Transition Sight System BUIS. Condition: New. Listed at 18.85 USD. ♦ These sights (sight set Front & rear) are removable sight that sets on a 45 degree offset with push QD button flip up style sights. You can utilize the scope on your rifle and your sights without having to remove, fold or add any sights since the irons are at the offset. ♦ Mounts to all picatinny rails. Dual apendature on the rear sight with sight adjustments for sighting. Front sight adjusts up and down for sighting. Front sight is used for rail height applications (not gas block height). ♦ Spring-loaded sights deploy at the push of a button to provide instant backup sighting. Quick Deploy System locks securely and requires a firm, positive press of the button to deploy or retract the sight, so it won’t accidentally activate when bumped—these sights stay where you put them. ♦ Minimal profile when folded with radiused edges and a smoothly curved front surface to prevent snagging on foliage, gear, or clothing. Cross bolt and side bar provide solid attachment to MIL-STD 1913 Picatinny or Weaver-style rail systems. Features ► Polymer Body ► Attaches To A Milspec 1913 Picatinny Rail ► Thumb Nut With Locking Retention ► Model 4/15 Front Sight With Adjustable Post ► Model 4/15 Rear Sight With Adjustable Windage And Two Appertures ► Flip Up Feature ► Canted At 45 Degrees For No Obstruction