MEC-GAR magazines meet or exceeded the tolerance guidelines, stringent testing and exacting requirements of military and law enforcement customers around the world. MEC-GAR incorporates the highest level of quality control measures during the manufacturing process and critical dimensions are regularly checked to maintain tolerance specifications. Features : Heat Treated Precision Stamped Strengthened Feed Lips MAGAZINE CAPACITY NOTICE This magazine exceeds 10 rounds of capacity and may be restricted or prohibited in CA, CO, CT, DC, HI, IL, MA, MD, NJ, NM, NY, RI, VA, VT, WA, and select municipalities. It is the buyer's responsibility to verify local, state, and federal laws before purchase. Orders that cannot ship to a restricted address will be canceled and refunded.