| SDJA86 | 6.01mm X 590mm/23.23in length, Tight bore inner barrel for M4 & AK | $54.00 |
| SDJA87 | 6.01mm X 650mm/25.59in length, Tight bore inner barrel for M4 & AK. | $54.00 |
| SDJA84 | 6.03mm X 590mm/23.23in length, Tight bore inner barrel for MIL16 | $54.00 |
| SDJA85 | 6.03mm X 650mm/25.59in length, Tight bore inner barrel for M16+ & AK+ | $54.00 |
| SDJC01 | JBU "S" High Speed Motor, Long Type | $45.00 |
| SDJC02 | JBU "T" High Torque Motor, Long Type | $50.00 |
| SDJA50 | JBU 300mm Tight Bore 6.03mm Barrel for M4CQBR | $42.00 |
| SDJA51 | JBU 440mm Tight Bore 6.03mm Barrel for M14 SOCOM | $42.00 |
| SDJA52 | JBU 500mm Tight Bore 6.03mm Barrel for M14 | $42.00 |
| SDJA73 | JBU 6.01mm x 112.35mm, 4.42inch tight bore inner barrel | $26.00 |
| SDJA60 | JBU 6.01mm x 229mm, 9.01inch tight bore inner barrel | $54.00 |
| SDJA62 | JBU 6.01mm x 247mm, 9.72inch tight bore inner barrel | $54.00 |