U.S. made Arsenal Inc. Floor Plate. The MA7-004U is produced using a high tech progressive dye. With the saying, "We don't cut corners!” This was made using 100% of the original technology. It is heat treated and blue finished and best of all, it bears the Arsenal Logo, the trademark for perfection and high quality products. Will fit 7.62 x 39 mm, 5.45 x 39 mm, and 5.56 x 45 mm bulgarian polymer mags.