The Lee-Enfield No.4 Mk 1* is the rifle seen carried by the majority of the British troops, mostly the Grenadier Guards in the Armored Column as well as the British 1st Airborne Division when they were trapped in Arnhem. The Lee-Enfield No.4 Mk 1* rifle was also seen in the hands of the Polish Airborne brigade troops. Colonel John Frost (Anthony Hopkins) was also seen using a No.4 rifle during the later stages of the battle for Arnhem.
M1 Garand
The main rifle used by US Airborne troops in the film is the M1 Garand. A gas operated clip fed semi-automatic shoulder weapon, it served as the primary American weapon from 1942-1957 and notably used by Major Julian Cook (Robert Redford) of the 82nd Airborne while leading his men to capture the Njmegen bridge.
M1 Carbine
The M1 Carbine is also seen used by US Airborne officers and NCO's in the film. Most notably seen when Sgt. Eddie Dohun (James Caan) pulls one out of its Jeep mount when he is hiding from a German Patrol in the forest. Also used by Col. Stout (Elliott Gould) when leading the charge to capture the Son bridge.
M1A1 Paratrooper Carbine
A Folding stock version of the M1 Carbine, this should have been more prevalent among the US Airborne troops, however only a few samples are ever seen in the film, most notably during large scenes of massing troops.
M1911A1
The M1911A1 is used throughout the movie, especially by Sgt. Eddie Dohun (James Caan) when threatening an Army combat surgeon (Arthur Hill) in order to get him to treat his wounded captain (Nicholas Campbell). The handgun is also seen, albeit briefly, holstered amongst American officers, NCOs and Military Police.
M1911
Apparently, the widespread issue of Browning Hi Power pistols (the iconic handgun of elite British Military units in World War II) to British Airborne units, only started after Operation Market Garden, so it is appropriate that they are seen using another handgun. A likely candidate in this case is the M1911 chambered in .455 Webley, issued to members of the R.A.F. In the film, the British M1911 is used by British 1st Airborne General Roy Urquhart (Sean Connery) and several other Airborne officers as they try to evade capture by Waffen SS forces.
M1A1 Thompson
The M1A1 Thompson is seen only briefly in the hands of US Airborne troops during the drop into Holland. Strangely, the Thompson is not prominently featured in the film despite being one of the primary weapons carried by the US Airborne along with M1 Garands and M1A1 folding stock Carbines.
M1928A1 Thompson
At least one M1928A1 Thompson is seen being carried by one of the US Airborne troopers.
Browning Automatic Rifle
The Browning Automatic Rifle is carried by US Airborne troops in the film, notably by 82nd Airborne troops during the assault on the Nijemegen Bridge.
Browning M2 HB
The Browning M2HB is used by British Armored troops mounted to their Lend Lease Sherman Tanks.
Sten Mk5
The Sten Mk5 is the standard submachine gun for British and Polish Airborne units in the film, most featured had the forward pistol grip removed as was the case for operation 'Market Garden'.
No2 Portable Flamethrower
A No2 Portable Flamethrower is used in the attack on the German bunker on the Arnhem bridge this weapon, known as the "Lifebuoy" for its resemblance to a lifesaver, was the standard British flamethrower.
PIAT
The PIAT (Projector Infantry Anti-Tank) spigot mortar is seen throughout the movie being used by British and Polish airborne units (who were similarly equipped). This weapon fired a 3 lb. hollow charge warhead via means of a powerful spring which ignited its propellant. The weapon had a powerful recoil, which necessitated it being fired prone since any other position would knock the user flat down. Seen especially during the repulse of the initial German assault on the Arnhem bridge.
Bren gun
The Bren gun is also used by the British Grenadier Guards of XXX Corps.
Vickers Machine Gun
The Vickers Machine Gun by British Grenadier Guards of XXX Corps.
The most commonly seen machine gun used by German troops in the film is the MG34.
Allied and Axis Armor
Leopard I Main Battle Tank (mocked up as a German Panther)
1960s Vintage Leopard I tanks were mocked up to resemble the World War II German Panther tank. The Leopard 1 tanks had 105mm main guns and two 7.62x51mm machineguns (FN MAGS). What is interesting is that supposedly all of the original cast hull Leopard 1 tanks were converted into the newer Leopard 1A1 during the 1970s (with upgraded armor, track skirts and thermal jacket on the gun barrel), however, despite the 'movie' modifications to make it look like a Panther, this is an original and unconverted Leopard 1. Since the film was mostly shot on location in the Netherlands (where many of the original battles took place), this is a Dutch Army Leopard, purchased from West Germany in 1969 (when the Netherlands officially adopted the Leopard as its' main battle tank).
Sherman Tanks
In order to add more tanks to the XXX Corps' column, several of the Shermans are actually mockups that were placed over Land Rovers.