This is what 2A Armament says:
The 2A Armament™ 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 2A Armament BL RAIL will ship with a 6AL-4V titanium barrel nut. An optional aluminum barrel nut is offered as a separate item for those looking to save maximum weight on a build. 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. See pictures for differences.
Made from U.S.A. Certified 6061 Extrusion
U.S.A. sourced 6AL-4V Titanium barrel nut as standard
M-LOK mounting solution
Mil-Spec hardcoat black anodized
Free floating design
1.3” Internal Diameter
7” Rail with Titanium nut (weight 5.7 oz)(2A-BLRML-7G2)
10” Rail with Titanium nut (weight 7.1 oz)(2A-BLRML-10G2)
12” Rail with Titanium nut (weight 8.4 oz)(2A-BLRML-12G2)
15” Rail with Titanium nut (weight 10.5 oz)(2A-BLRML-15G2)
1-5/16” crows foot tool or premium armorers wrench recommended for installation (Not Included)
$179.00 Regular Price