Here’s a precision and economical solution for a Flip Up Sight Set for all AR15 / M16 rifles. The A.R.M.S.® #71L-F and #71L-R Flip Up Polymer Precision Sights fit Picatinny rail platforms, and feature durable, metal-reinforced polymer construction. The Front Sight is adjustable for elevation and includes a Steel Front Sight Post. The Rear unit features Dual Steel Apertures (same as utilized in the A.R.M.S.® #40L® for CQB and long range shooting applications). Both are .600″ in height from the top of the receiver when in the folded position and are spring loaded to deploy quickly when their locking latches are pressed.