i plan on getting the nordic extension the end of this week. i also just found this mount that on mesa's website says it fits benelli pistol grip stocks. the website selling it says for m2 and m4 only but it looks like it should fit. i emailed mesa to find out and will post the response when i get it.
Glock 22 27 31 OD, Springfield XDM 9mm, Rock Island 1911, Benelli SuperNova Tactical, LCW15 M4, POF AR22, Aero Precision/Stag 7H 6.8 SPC, Taurus Magnum Judge
Tactical Shotgun Club Member - 676
Black Rifle Club Member - 676