Nordic Components High Quality Extension Magazine Tube Kits.
Includes the tube, Nut, Cap and Spring. The end cap screws on to the end for easy removal and cleaning. The Benelli comes in a +5 and +7 which will give you 8+1 and 10+1 respectively. The tubes will come close to being flush with a 21" and 26" barrel respectively. +++++++++++++++++++++++++++++++++++++++
We also carry the +4 for the Benelli Nova and Beretta Extrema.