These are precision American made aftermarket replacement screws and picatinny clamps for the MaTech backup iron sights. The US Military uses and issues these mounting parts. Therefore, you can expect quality American made direct fit replacements.
The U.S. Department of Commerce controls this product under Export Administration Regulations (EAR) and the U.S. Department of State, Directorate of Defense Trade Controls Bureau of Political-Military Affairs, in accordance with 22 U.S.C. 2778-2780 of the Arms Export Control Act (AECA) and the International Traffic in Arms Regulations (ITAR). (22 CFR Parts 120-130).
It is unlawful to export, or attempt to export or otherwise transfer or sell any hardware or technical data or furnish any service to any foreign person, whether abroad or within the United States. You must obtain license or written approval of the U.S. Government in order to export this product.