The following guns can be seen used in the film The Newton Boys:
Single Action Army
Willis Newton (Matthew McConaughey), Jess Newton (Ethan Hawke), and Herbert "Slim" Holliday (Charles Gunning) each use Single Action Army revolvers during their bank and train robberies. Jess sometimes carries two.
Cavalry Model (7.5" barrel)
Willis (Matthew McConaughey) carries the Cavalry SAA with a 7.5" barrel.
Colt Single Action Army w/ 7.5" barrel known as the "Cavalry" model.
Willie points his Single Action Army at the bank teller during his first robbery.
Willis points his SAA at a bank guard after a brief struggle.
Willis backs away in shock after having to shoot the guard in the arm.
Willis aims his SAA at the train while preparing to throw a "poison gas" bomb.
Willis threatens a train guard.
Quickdraw Model (4.75" barrel)
Jess (Ethan Hawke) and Slim (Charles Gunning) use Quickdraw SAA revolvers with 4.75" barrels.
Colt Single Action Army w/ 4.75" barrel, case colored and blued, referred to as "Quick-Draw" or "Civilian" model.
Slim with his SAA outside the first bank.
Jess grabs his SAA when there is a knock at their hotel room door.
Jess fires his Single Action Armys akimbo.
Jess holds an SAA on a Canadian bank guard during the street robbery.
Jess keeps his SAA on a train engineer during the Roundout robbery.
Jess checks his SAA when the gang prepares to split up.
Winchester Model 1892
The Boswell sheriff who double-crosses Willis and Slim fires a Winchester Model 1892 at them, hitting Slim's horse.
Winchester 1892 -.32WCF/.38-40/.44-40/.25-20.
The sheriff aims his rifle.
Colt New Service
The crooked banker from Boswell (Gary Moody) fires a Colt New Service when he and the sheriff are chasing Willis. Brentwood Glasscock (Dwight Yoakam) also carries a Colt New Service during the robberies, notably using it during the Roundout train robbery with a lanyard attached.
Colt New Service M1917 in moon clipped .45 ACP.
The banker shoots his New Service at Willis.
A New Service and a smaller revolver can be seen packed away in one of the gang's suitcases.
Brentwood runs after the train with his New Service.
Brentwood aims his New Service at Dock.
double-barreled shotgun
Joe Newton (Skeet Ulrich) carries a 12 Gauge Double Barreled Shotgun during many of the gang's bank and train robberies.
Joe nervously watches the street during the Omaha bank robbery.
Joe and the rest of the gang prepares for the double bank job.
Brentwood and Joe threaten an old man on the Roundout train.
Joe orders the train passengers to help them move the sacks of money.
Winchester Model 1897
Jess Newton (Ethan Hawke) carries a Winchester Model 1897 during the gang's bank robberies. Slim also carries one during the Roundout robbery.
Jess threatens an old lady watching their robbery from her apartment.
Slim watches the train robbery in progress.
Smith & Wesson M1917
Dock Newton (Vincent D'Onofrio) can be seen cleaning a Smith & Wesson M1917 while riding in the gang's getaway car.
Smith & Wesson M1917 Revolver - .45 ACP
Willis spins the cylinder of the M1917 to show Dock just how many zeroes are in one million dollars.
Winchester Model 1912
Dock Newton (Vincent D'Onofrio) carries a Winchester Model 1912 during the gang's bank robberies. Joe (Skeet Ulrich) carries one during the Canadian heist.
Example of a Winchester Model 1912 Riot Gun used in film
Dock prepares to show Willis the "two-step" method for entering a bank.
Dock holds his Model '12 on a Canadian bank guard.
Dock threatens the guards with his shotgun.
Joe aims his Winchester '12 on a Canadian bank guard.
Joe's finger moves to the trigger.
Browning Auto-5
Dock Newton (Vincent D'Onofrio) carries a Browning Auto-5 shotgun during one of the gang's bank heists. Willis later attempts to use the gun during the Canadian street robbery, but it jams on him.
Browning Auto 5 (pre WW2) - 12 gauge
Dock ducks as a safe explodes inside the bank.
Willis threatens the bank guards with his shotgun.
A shell jams in Willis's shotgun after he fires a warning shot.
A bank guard grabs the shotgun from Willis and points it at him.
Colt Police Positive
The Canadian bank guards in Toronto carry Colt Police Positive revolvers that they draw on Joe and Dock.
Colt Police Positive - .38 Special.
A bank guard sticks his revolver into Dock's chest.
A bank guard threatens Joe, who distracts him with a shotgun blast into the newspaper stand.