Using an insert barrel has always been a compromise. Run a bored-out pump handle, let your UC kit run on the bottom edge, or bore the stock barrel and run a little loud.

This barrel back opens up your options. By using an 8" Freak XL insert and a standard Freak front, the threads are pushed forward three inches, clearing the pump handle. Bore down over the full 8" to maximize efficiency, while running a tip of your choice for better sound signature or ergonomics. Insert is retained by an internal o-ring.

Insert and front not included. Finished barrel is anodized black.

The small o-ring goes on the breech threads, and the larger o-ring goes in the internal groove, behind the barrel front threads.