DESCRIPTION FOR AIRSOFT USE ONLY! For MIL-STD-1913 / Picatinny Rail spec. For AIRSOFT 20mm rail. Need rail section or adapter to compatible M-LOK or KeyMod rail interface system. Required to DIY ability. Specifications: ● Product Brand : VFC ● MADE IN TAIWAN ● SKU : VF9-BPD-G28-TN01 ● Material : Aluminum Alloy, Metal. Features : ● Compatible with all type MIL-STD-1913 / Picatinny Rail spec. handguard or rail system. ● It can be directly installed with VFC Duty Bipod.