The 2A Armament(TM) BL RAIL Gen 2 M-Lok series has styling changes in the picatinny pocketing to match with the Balios Lite Gen 2 or Aethon receiver sets. By utilizing a titanium barrel nut, and an innovative 45 degree mounting system, the BL RAIL achieves a solid lockup with the upper receiver. The BL RAIL Gen 2 is a great fit with the new styling on any quality forged or billet upper receiver offered from other manufacturers.Note: If you have an earlier Balios Lite receiver set you will want to use the first generation BL RAIL M-LOK series.
