Spyderco Delica 4 FRN Knife Color:Black A large mechanical jacket to core InterLock® 07650122641 A large mechanical jacket to core InterLock® band works to keep the bullet and core from separating for maximum weight retention •Low cost color injection molded folding back up sight •Adjustable for elevation & fits most 1913 Picatinny railed hand guards but is specifically tailored to the AR15 M16 platform •Front sight tool & all mounting hardwware included •NOTE: Not compatible w railed gas blocks This version of the popular Delica 4 has a non reflective VG 10 blade that is coated with black titanium carbonitride and is flat saber ground Inside the handle dual skeletonized stainless steel liners make the knife stronger without adding weight and make an anchor for all external and internal components to attach through adding sturdiness and rigidity