And the Model 12 is the Caterpillar Dozer of Pump Guns!! I've got both 2&3/4" guns and a 3" gun...all have Simmons Ribs. The 3" I opened to Modified Choke. They are made from machined STEEL....even have adjustments for any possible wear. If one has problems with ejection...it is due to short shucking or needs a long needed cleaning!! And if you can shoot FAST....with the trigger held down it will fire every time you slam the bolt shut!!!