+.001 Oversize for a perfect tight fit, (factory B-5). BossArms’ OverSize (B-5) pins solves the age old problem of the B-5 Receiver Cross pins “falling out”; PLUS , removes sponginess between Trigger Group and Receiver for a crisp and consistent trigger pull. Hardened – Bright with Black Ends. **Comes package of one pair (2 pins), [...]