The standard issue RCMP gun is the Smith & Wesson 5946 9mm Double Action Only pistol.
M14 was standard issue military rifle before m16.
There are a lot of weapons which are standard issue. Assuming you're referring to the service rifle, it's the L85A2.
Austria, Australia, New Zealand, and Ireland use it as their standard issue rifle. Several other military forces issue it to select units.
The standard issue rifle of the Royal Australian Army is the F88 Austeyr. It is a variant of the Austrian made Steyr Aug, manufactured under license.
The standard issue rifle of the Italian military is the Beretta ARX160, which has been in service since 2008. It is a modular, lightweight assault rifle that can be configured for various roles and is chambered in 5.56×45mm NATO. The ARX160 features a gas-operated, rotating bolt mechanism and is designed for versatility and ease of use in various combat situations. Additionally, it has been adopted for use by various military and law enforcement units in Italy and beyond.
Unlike the rest of the British military (who use the SA80) the most common assualt rifle for the SAS is the M4a1 carbine. During the 1990's they used the M16
The standard assault rifle for the US Armed Forces is the M16, the Marines first created the M16A4 the newest version of the M16, before 2011 the US Army were using the M16A3 but now they are adapting the M16A4. Although the M4A1 carbine is being used more by the US military now then the M16. In about 10 years the M4 is to be replaced.
100-1000 or more USD
Commonly called the Carcano, this was a bolt action military rifle that fired a 6.5mm bullet. It was the standard rifle of the Italian military for many years. It was also the type of rifle reportedly used to kill President John Kennedy.
The Austeyr F88, imported from Australia. It's a licence manufactured variant of the Steyr AUG rifle.
M16A2 & M16A4 rifles and M4 series carbines.
Standard issue rifle for British Commenwealth troops (which included the Anzacs) was the .303 calibre Lee Enfield rifle.