WHAT DOES 30RD MAG FOR SALE MEAN?

The UBR GEN2 encompasses a fixed cheek piece which presents a reliable cheek weld in any of its eight positions.AR-9 higher receivers, out there through Arm or Ally, are very important parts intended to full the assembly of AR-9 pistols or rifles, noted for their compatibility with the 9mm caliber and good quality construction to make sure reliable