Chokes:
The 301 uses Winchester Winchoke/Browning Invector pattern chokes. These are widely available from retailers such as Midway USA or Brownells. We also suggest Trulock or Carlson's Choketubes.
The 410 Gauge 301 specifically uses "Short Invector" pattern chokes. Carlson's offers a full line that fits this firearm.
301 and 301 Turkey models are capable of firing slugs, if the factory choke tube is replaced with a cylinder constriction choke. NEVER attempt to fire a a slug through a Turkey choke!
Stocks:
As the 301 is an imported firearm, we do not have alternative stocks (compact, thumbhole, etc) available for purchase.
Barrels:
301 barrels are fitted and serialized to the firearm receiver at manufacture. Savage Arms does not sell alternative or extra barrels.