M5A2 Folsom Carbine

"In December of 1951, SRPA adopted the M5A2 Folsom Carbine as the standard-issue weapon for its Sentinel program. The carbine is the most dependable on the market, firing .303 rounds with an underslung M200 40 mm high-velocity grenade launcher."

The standard issue rifle of the U.S. Army Rangers. The M5A2 Folsom Carbine is nicknamed "the paddle" for its wide wooden stock and ability to "spank" an enemy. The weapon shoots a .303 Round, the same as the British rifle, No. 6 Mk 6. The alternate fire turns it into a grenade launcher that launches 40 mm grenades from the rifle's underslung M200 40mm grenade launcher.

Trivia
The Folsom has a strong resemblance to the M14 EBR rifle.

It had a 50 round clip and can carry 3 grenade launchers in the first resistance. In Resistance 2, they decreased to 30 and the player can carry only 2 grenades for the grenade launcher.