Optic Centerline Height: 1

This hi capa recoil spring has a special heat treated finish

250 Lumen max output

Full length 5

Short rail covers 1½ M-LOK® slots or 3 KEYMOD™ slots

NcStar Picatinny Riser .625Cantilever Guarder Optic Centerline Height: 1Cantilever 1913 Picatinny Rail 0. 625H riser X 5. 5"L. 5. 5 long cantilevered riser rail. Cantilever design, allows rail to bridge over the handguards Allows the user to raise their optic 0. 625 above their receiver height Picatinny rail for the desired optic height. Great for a better heads up shooting with night vision equipment. Height: 0. 625" Length: 5. 5" Weight: 3. 7 oz.