total capacity of 5 (4+1) The Mossberg 930 autoloader is a gas operated Semi Auto shotgun that handles the full range of 2 3/4" and 3" shotshells, including magnum field and low brass target loads. 930 models feature a "quick empty" magazine button for easy unloading and a cocking indicator that protrudes from inside the trigger guard.
Specifications and features:
Mossberg 85120
Model 930 Semi Auto all purpose field shotgun
Gas operated
12 gauge
26" vent rib barrel
4 +1 capacity
3" chamber
Ambidextrous thumb safety
Cocking indicator
EZ-Empty magazine button
Uni-Line stock and receiver
Walnut stock
Blued finish
Bead sights
Accu-Set choke tube system
Choke tubes interchangeable with Mossberg 500 models
Adjustable drop and cast spacer system included
13.875" length of pull
46.5" overall length
1.5" drop at comb
2" drop at heel
7.75 lbs.

Hi Hernan, You're good with this one buddy. 5 rounds.

Hernan, this shotgun has a 4rd tube and a capacity of 5rds with one shell in the chamber : mossberg.com/product/930-hunting-all-purpose-field-85120/

It has a capacity of 5.