B&T APC 9/10/40/45 buffer end assembly

B&T APC series rear buffer/receiver end assembly marked "APC 9/10/40/45". Includes recoil spring and buffer components as shown. Designed for B&T APC platform variants in 9mm, 10mm, .40 S&W, and .45 ACP (model compatibility should be verified by buyer). Finish appears matte black with normal handling marks visible. Great spare/replacement part for APC owners or builders needing the correct factory assembly.