It has a 22” VR barrel with ported improved cylinder choke tube. Currently searching for an 18.5” 5 shot Defender barrel. Just took delivery of a Nordic Plus 3 magazine tube extension, nut, and barrel clamp. Nordic stuff is pricey but top quality. Barrel clamp will accept the Streamlight
Pro Tac HL-X 1000 lumen light that arrived today.

I love the 1300 Defender. It’s my go to. Good luck in finding a barrel. Might be easier to find a parts Defender at a gun show, that’s what I did. Mine are a 7 shot magazine.

Would love one in 20ga as well, but that’s even more rare.