1934-1951 pistol:
1951-2000 pistol: Uzi submachinegun.
Post 1960 assault rifle: M1960 rifle. It is a copy of a vz. 58 P that was stolen by spies. However, it had the addition of having RPK style sights, fold-up grenade sights, extended magazine release, a bipod mount, a threaded barrel for a grenade launcher muzzle brake combination (that was later used on the AK-74) and suppressors.
There are 3 variants: 7.62x39, 5.45x39 (this wasn’t officially adopted by any government), and .223/5.56x45mm. They respectively used AK-47/AK-M, AK-74, and M16/AR-15 STANAG magazines.
A variant of the Steyr AUG was also adopted in 1979, but with a magazine well for M16/AR-15 STANAG magazines.
2000-present pistol: MP7, with 3+ position folding stock and extended charging handle.
Revolvers from 1864-1888: Remington 1858 (in .46 rimfire after 1868), S&W Model 3 in .44-40.
Pistols from 1986-present: Glock 18, H&K MP7.
Both were short lived, with the M3 Garand being replaced by the Sturmgewehr 45 in 1946, and the M2 Garand being replaced by the FN FNAL-M in 1953.