MI Benelli M4 M-LOK Handguard This anodized aluminum rail is compatible with Benelli M4 and Clones such as Military Armament Corporation from SDS Imports. Specs: 12" overall length 8.7oz installed M-LOK Compatible 6061 Aluminum Type 3 Hard Coat Anodized 5-Slot Polymer M-LOK... MSRP: Was: Now: $194.00 Add to Cart