You can cut loops off of a Wolff spring down to 8"-10" longer than the tube and extension, if it will gain you room for another shell. Good luck, Slater
XTheOwl on another forum wrote:
I called Nordic Components who gave me the overall length on the +2 extension as 5.9 inches. I measured the distance from the metal ring on the barrel to its end and got around 6.25". I didn't see how I could go wrong, so I ordered the extension from Nordic directly (along with the cool rail clamp).
Sure enough, the mag extension is shorter than the barrel by 11/32" (as close as I could measure), which is around what I was looking for.
I know that it doesn't matter as far as functionality, but I hate it when the extension goes past the barrel.
I was going to post a pic, but this forum will not let me. There are some pics in the Benelli photo album over at ShotgunWorld though. Only two under XTheOwl...
I forgot to mention, [with the Nordic +2 extension], it now holds 7+1 with 2-3/4" (+3); 6+1 with 3"; 5+1 with 3-1/2", with spring cut approximately 14" past the tubes...
Nordic Components Inc.
EXT-BR-12-02 EXT TUBE BERETTA EXTREMA 12GA +2
and the clamp in the pic (which you don't need unless you want the rail...)
BCT-XX-12-00 - BARREL CLAMP W/ TAC RAIL 12 GA