Good for limited use with caveats - BlackHawk S.T.R.I.K.E. TAC Picatinny Mount Kit - Replacement Rail Assembly

These rails are hard to find now (when I bought from Optics Planet I bought the last 2 at the time) as they are not recommended on the SERPA leg platform anymore. From what I understand they were pulled because the plastic rails broke easily and people lost gear. Now those reports were mostly from soldiers in highly dynamic situations. For casual users (civilians, Airsofters, etc.) these are just fine. You can attach other rail systems to the drop leg platform with some tinkering but it's nice to have the units that were meant for it.