The IMI Defense Carbine Drop-In Quadrail is machined from hardened aircraft aluminum, these lightweight Battle handguard  2 piece quad rails is a perfectly tight fit, ultra-slim cross-section, 4 full T-marked 1913 Picatinny rails at 12, 3, 6 & 9 O’clock and 5 QD sling swivel ports for perfect mission adaptability  – this is the ultimate battle rifle rail system.

IMI Defense Aluminium Quad Rail Rifle Length Drop In for M4 / M16 Series
Machined from hardened aircraft aluminum
All sharp edges removed
Finished in MIL-SPEC hard coat anodizing.
No gunsmith needed for installation
5 QD sling mount ports, 2 on each side plus 1 on the front of the bottom rail
Ultra-slim – Only 2.22″ wide
Overall length: 12.40″.