The LSFA, or Low Snag Forward Assist, for AR-15s is collaborative design brought to market by Forward Controls Design (FCD). The advent of the ambidextrous charging handle, along with other ambidextrous controls, is a boon for AR-15 users, but it is not without unintended consequences. The forward assist rim is in the path of the user's fingernail or knuckle if he uses the right handle of the charging handle to load/reload, the user can easily snag on the rim. FCD solution is a rimless forward assist (LDFA), available since 2015. LDFA does away with the rim found on the A2 forward assist. As the FA isn't an often-used control, the design forgoes the surface area offered by Mfg: Forward Controls Design Llc
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