There is beginning to be some chatter over Abrams Airborne Manufacturing’s (Vltor) lawsuit against Magpul alleging that the ACS design violates their Modular Firearm Buttstock patent. Both stocks feature removable battery storage compartments. However, it is important to note that this occurred last October and this isn’t a new action. Additionally, this is the second of three suits filed over the last year against Magpul concerning patent issues. The initial suit was from A.R.M.S. (imagine that) over their dual aperture rear sight. Then, right before SHOT Show Robinson Arms brought suit against Magpul as well as a slew of others.
Abrams Airborne Lawsuit Alleging Patent Infringement