7.62x39 mm
Total weight: 134,188 kg (295, 833 pounds)
The US sent close to 300,000 pounds of 7.62x39 mm ammunition to the Syrian rebels.
These rifle cartridges can be used for older models of the AK-47.
Source: IHS Jane's
7.62x54 mm
Total weight: 67,404 kg (148,600 pounds)
The 7.62x54 mm cartridge is an older variety of ammunition that was first created by the Russian Empire. It has since been adapted multiple times, and can be used in a variety of weapons.
Most likely, based on the other items the US is sending to the Syrian rebels, the ammunition is intended to be used with the PK machine gun, which the US is also sending to the rebels.
Source: IHS Jane's
14.5×114mm
Total weight: 369,681 kg (815,007 pounds)
The 14.55 mm cartridge is a Soviet ammunition that is primarily used for heavy machine guns. The ammunition can also be used for anti-aircraft fire and for taking both armored and unarmored vehicles.
Source: IHS Jane's
9M111M
Total weight: 21,693 kg (47,824 pounds)
The 9M111M is a wire-guided anti-tank missile. The missile has a range of 1.6 miles, can be optically guided against its targets, and can penetrate the armor of certain tanks and vehicles.
Source: IHS Jane's
Faktoria launchers
Total weight: 2,720 kg (5,996 pounds)
Faktoria launchers are the launch tubes that fire 9M111M missiles.
Source: IHS Jane's
PKM
Total weight: 6,340 kg (13,977 pounds)
The PK machine gun is a general-purpose machine gun that can be used in a variety of situations. The weapon can be used by front-line infantry, as well as being used as a vehicle-mounted weapon.
Source: IHS Jane's
RPG-7
Total weight: 4,120 kg (9,083 pounds)
The US sent a number of RPG-7 launchers to the Syrian rebels with a range of munitions. In addition to the launch tubes, the US delivered 151,237 pounds of PG-7VM munitions and 275,619 pounds of PG-7VT munitions.
Both warheads are intended for use against tanks.
Source: IHS Jane's
AK-47 & DShK
Total weight: 12,250 kg (27,006 pounds)
Due to the method of US accounting for arms shipments, some armaments were listed together. IHS Jane's notes that the US logged 27,006 pounds of a joint AK-47 and DShK shipment.
AK-47s are one of the most popular rifles used in the world due to their ease of use and sturdiness. The DShK is a heavy machine gun that can also be used as a heavy infantry machine gun.
Source: IHS Jane's
AK-47 & PKM
Total weight: 6,540 kg (14,418 pounds)
In addition to sending PKMs by themselves, the US also sent a bundle of AK-47s and PKMs to the Syrian rebels.
Source: IHS Jane's
DShK & RPG-7
Total weight: 3,585 kg (7,903 pounds)
Additionally, the US sent a 7,903 pound bundle of DShK and RPG-7s to the Syrian rebels.
Source: IHS Jane's