Weapons

Most common weapons that Rambo uses in the movies are described here.

The 2 knives in First Blood and Rambo 2 are made by Lile Knives using D2 Steel

The First Blood knife which Rambo used to make a coat out of canvas of tarp and was also used to defend himself against the law-officers and National Guardsmen.
Technical info: 14" Overall. Features a 9" Stainless Steel blade with saw teeth and a matte satin finish hollow handle wrapped in heavy O.D. green nylon cord with waterproof O-ring, survival kit; aluminum butt cap with precision compass mounted inside. The stainless steel guard features: drilled lashing holes with two screwdriver points (Phillips & Flat) with a top grain American made leather sheath.

This is the Rambo:First Blood 2 knife. It was used a lot for stabbing soldiers and other things.
Technical info:15-3/8" Overall. Features a 10" Stainless Steel blade with sawtooth back and non glare black finish, hollow handle wrapped in heavy black nylon cord with waterproof O-ring & lanyard hole, survival kit, aluminum butt cap with precision compass mounted inside. Stainless guard features drilled lashing holes and Phillips & Standard screwdriver points. Top grain American made leather sheath.

3rd Bowie Knife of the Rambo Saga and it differs from the other 2 because this one was not made by Lile Knives But by Hibben.
Technical info:A massive 16" overall. There is no mistake about what you have in your hand. The superior handle design makes it feel like a part of you when you grip it. Superior quality parts and construction.
-11" long stainless steel Bowie Blade wwith anti-glare sighting slot.
-Hardwood handle with stainless guard && pommel and a lanyard sheath.
-Custom fitted, heavy American made topp gain leather sheath.

Man ! This gun is awesome ! It just never stops shooting. Rambo uses the m60 gun in First Blood to destroy the power generators which are connected to the lampposts. Furter it was used to devastate the whole police department and to wound Will Teasle, the sheriff.
Technical info:The M60 E3 7.62mm machine gun is a lightweight, air-cooled, disintegrating metallic link-belt fed, portable or tripod mounted machine gun designed for ground operations like its predecessor, the M60. It is gas operated with fixed headspace and timing which permits rapid changing of barrels. (Associated components: mount, tripod, machine gun, 7.62mm, M122). Slightly different from its "parent," the M60, the M60 E3 has a receiver-attached bipod which easily deploys for stability. It has an ambidextrous safety, universal sling attachments, a carrying handle on the barrel, and a simplified gas system that does not require safety wire to prevent loosening. However, the light weight barrel is not safe for overhead fire and is not capable of sustaining a rapid rate of fire of 200 rounds per minute without catastrophic failure of the barrel.

This is the standard rifle of the U.S. Army. I like the gun, it looks cool. The National Guardsmen are equipped with these rifles , and Rambo too later on.
Technical info:The M16A2 semiautomatic rifle is the standard by which all military rifles of the future will be judged. This variant of the M16 fires a three-round burst in semiautomatic operation. The system incorporates an adjustable rear sight which corrects for both wind and elevation, a heavier barrel with 1-in-7 rifling, and a muzzle compensator to prevent muzzle climb during semiautomatic operation. The M16A2 is capable of firing all NATO standard 5.56mm ammunition and can fire 40mm grenades when equipped with the M203 Grenade Launcher.

The brute AK-47 rifle is a familiar weapon for the gun freaks out there. It uses a large bullet caliber of 7.62 ,kinda devastating. The AK-47 is modified in RamboIII , it has an 40 mm grenade launcher attached under the barrel.
Technical info:The AK-47 ( AK = Avtomat Kalashnikova) is chambered in 7.62x39 and features hardwood furniture with a fixed stock. The AK-47 has a 16 inch barrel with a muzzle nut to protect the threads. The AK-47 features a stamped receiver with a non ribbed cover plate and magazine. The rifle can be fired in two different firing modes; semi and full auto. The AK-47 has a 800 meter leaf sight that is only adjustable for range. All windage adjustments must be made by using the front sight. The AK-47 weighs 4,300g and has a rate of fire of 600rpm. The rifle will accept most synthetic and metal magazines, generally 30 rounds in capacity. The rifles effective killing range is 1,500 meters, and is generally not used for more than 300 meters. The original AK-47 was not outfitted for the use of a bayonet, however the design was changed and a bayonet was added. The AK-47 also features a hollow compartment in the buttstock which was used to keep the cleaning kit.

Not just an common Robin Hood bow, this one is a state-of-the-art bow including arrows with explosive tips. It is silent , very deadly and lightning-fast. Rambo uses the bow in Rambo 2: First Blood and Rambo III to kill, destroy and to win.