No Country for Old Men
The following weapons were used in the film No Country for Old Men:
Colt Government Model
Colt Series 70 Combat Government Model
Sheriff Ed Tom Bell (Tommy Lee Jones) carries a Colt Series 70 Combat Government Model. This was the only model in that time frame that would have had black grips with the gold medallions, and combat style hammer. The Series 70 Combat Government Model was the forerunner to the Combat Elite. It is notable that in the novel, Bell remarks in an internal monologue that he still likes "the old Colt's .44/40" and that if that fails to stop an attacker the best one can do is throw the gun and run. Later in the book he draws, but does not fire, a single action revolver presumably loaded with tried and true .44/40s.
Smith & Wesson Model 13
When Anton Chigurh first goes to the trucks with the "mind riding bitch" guy, he executes both him and his partner with what appears to be a Glock 19 pistol. A Glock would be an anachronism as they were not produced until 1983.
Star Model P
When Llewelyn first finds the trucks, he opens the door to a red truck, and beside the driver you can see a Star Model-P.
Heckler & Koch SP89
A Heckler & Koch SP89 is picked up by Llewelyn Moss at the scene of a drug exchange gone wrong. If this film takes place in 1980, then the SP89 is anachronistic, since the gun was not manufactured until 1989.
Anton Chigurh (Javier Bardem) uses a suppressed Intratec TEC-9 pistol when he is chasing Llewelyn Moss in Eagle Pass. This is anachronistic because the TEC-9 was not manufactured until 1985 and the film takes place in 1980.
A MAC-10 can be seen next to the dead drug dealer on the left.
When Sheriff Ed Tom Bell and Deputy Wendell are checking out the drug deal gone bad. An Uzi is seen lying next to a drug dealer.
In the motel a drug dealer is seen using a Cobray M11/9. As with numerous other guns depicted, the M11/9 is an anachronism for the film's date of 1980, as it was first manufactured in 1983.
Norinco Type 56
Several Norinco Type 56 copies of the AK-47 assault rifle (both the fixed stock Type 56 and folding stock Type 56-1) can be seen on the ground next to dead drug dealers at the site of the failed exchange.
According to the novel , the rifle Llewelyn uses to hunt Pronghorn is a "heavy barreled .270 on a '98 Mauser action with a laminated stock of maple and walnut. It carried a Unertl telescopic sight of the same power as the binoculars [10x]". This description closely matches the Parker Hale 1200 series rifles , although the movie prop is a Remington 700 variant, based on the appearance of the action and the placement of the safety.
The stock appears to be that of a 700VLS and the rifle is most likely chambered for .243 Winchester or 308 Winchester, though for pronghorn a .223 Remington or .22-250 Remington could work. The 700VLS is anachronistic, as it was first produced in 1995.
Winchester 1897 Field (Sawed-off)
Llewelyn Moss (Josh Brolin) uses a 12 gauge Winchester Model 1897 pump shotgun for a large part of the film, and uses it to wound Anton. He originally buys a long barreled 'Field' shotgun, and subsequently saws off the stock and saws down the gun barrel to roughly the length of a 'Riot' version.
Winchester no longer makes this model, and those still in circulation are considered collector's items. The actual firearm used in the film was a clone of the Winchester 1897 made by Norinco. In the DVD special features, the armorer mentions that the fact that in the book it says that Moss cocks the hammer on the shotgun, clued him into the fact that it was a Winchester Model 1897.
Anton Chigurh (Javier Bardem) uses a sound-suppressed Remington Model 11-87 Semi-Auto shotgun with a short barrel in four shooting scenes in the movie. As with many other firearms, this gun is also anachronistic because the Remington 11-87 was not designed until 1987 and the film takes place in 1980.
Captive Bolt Pistol
Chigurh seems to prefer to use a Captive Bolt Pistol on his victims when he can. He also uses it to blow out door locks. The Captive Bolt Pistol is a pneumatic gun that fires a bolt into the brains of cattle to stun them before slaughter. Like the name suggests the bolt never entirely leaves the gun, it is shot out by air (or a blank) and then retracts back into the gun by return springs. Though not a "firearm" it is a gun and does play a big role in several scenes. Anton most likely chose this weapon because it requires no ammunition, is almost completely silent, and leaves no physical evidence (bullets and/or empty casings).