Q Q-SERT Adapter 2.6in. The Q-Sert 1913 Adapter 9 Slot (4.5in) gives you a Picatinny interface where you need it without committing your entire setup to it. It mounts directly to Q-Sert and provides a solid repeatable platform for accessories that still live in the 1913 world. Clean integration. No extra bulk. Just the rail section you actually need. Specifications for Q Q-SERT 1913 Adapter 9 Slot 4.5in: Manufacturer: Q Color: Black Finish: Black Fabric/Material: Aluminum Gun Rail: Picatinny Length: 4.5 in Quantity: 1 Package Contents: Q Q-SERT 1913 Adapter 9 Slot 4.5in Q RAIL-1913-4.5-QSERT: Q-SERT 1913 Adapter 2.6in