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-only .435" high-with radiused edges and a smoothly curved front surface to prevent snagging on foliage, gear, or clothing. Crossbolt and side bar provide solid attachment to MIL-STD 1913 Picatinny or Weaver-style rail systems. All-aluminum construction is lightweight, yet plenty strong to handle the hard knocks of tactical operations, with a durable, Mfg: Yankee Hill Machine Co., Inc. SPECS: Aluminum, hardcoat anodized, matte black. All models 1" (2.5cm) deployed length, 1A 1/4" (3.2cm) wide, .435" (11mm) folded height. Front Sight w/Ears - 2-1/8" (5.4cm) folded length, 1.420" (3.61cm) deployed height from top of base to top of blade.&n