The IMI Defense Drop-In Quad Rail handguard is machined out of aircraft-grade aluminum, designed specially to easily drop in on the rifle. This ultra-lightweight Battle 2 piece Quad Rail is a perfectly tight fit, ultra-slim cross-section,  T-marked 1913 Picatinny rails at 3,6,9 & 12 O’clock for perfect mission adaptability  – for civilians and special forces personnel.