Airsoft M4 Front Sight Block

Stock FSB on my M4 was visible on the optic even after raising my eotech, so I removed the FSB. Doing this will leave your handguard loose as a plate is used to hold the upper and lower receiver on some models, so this design holds them in place and serves as an aesthetic low-profile extension with 3mm metal rods and 4x short M3 screws with heat set inserts.