M2 slug gun upgrade/ modifications

[Deer slayer]

Going to buy. A 20 gauge m2 slug gun but I have some questions that hopefully you can help with.

Question #1 can I buy a magazine extension for the slug gun? Any recommendations?

#2 can I buy a combo gun or a field smooth barrel to interchange with slug barrel for coyotes and turkeys?

#3 is there a thumb hole stock available for the m2

[truckcop]

1. Sometimes, if you can find them. Benelli OEM (rare find, GunBroker, Numrich), Nordic Components (when they have them in stock). 2. Yes, you could buy a smoothbore barrel for that shotgun. (pricey). 3. Never seen such for a 20.

[Scout_21]

Pardon my ignorance but what would a thumbhole stock give you that a pistol grip one wouldn't...assuming you can get one for the 20 gauge. Good luck with your upgrades!

[BM4robbins]

Pardon my ignorance but what would a thumbhole stock give you that a pistol grip one wouldn't...assuming you can get one for the 20 gauge. Good luck with your upgrades!

Perhaps legality where he lives. Only a guess but seems to be common.

[remarkable]

Question #1.  Magazine extension:  Personally I would not install a magazine tube extension on the M2.  If you do I would only use it as little as possible.  The result of the magazine tube extension will be a bent carrier latch.  I replace several carrier latches per year, as well as removing them from every Benelli I service.  The majority of the bent carrier latches come from magazine tube extensions.  You are placing a tremendous amount of pressure on the carrier latch when compressing the magazine spring with more than the factory magazine capacity.