Barrett M82 Anti-material rifle,United States of America

The M82 is a short recoil semi-automatic firearm. When the gun is fired, the barrel initially recoils for a short distance (about 1 in or 25 mm), while being securely locked by the rotating bolt. After the short travel, a post on the bolt engaged in the curved cam track in the receiver turns the bolt to unlock it from the barrel. As soon as the bolt unlocks, the accelerator arm strikes it back, transferring part of the recoil energy of the barrel to the bolt to achieve reliable cycling. Then the barrel is stopped and the bolt continues back, to extract and eject a spent case.

Barrett M95 Anti-Material Rifle (AMR),united States of America

The Barrett M82 was the first notable American-made .50 caliber Anti-Material Rifle (ATR) when introduced in 1982. The line saw an evolution of sorts develop through the M82A2 which was made into a "bullpup" version (magazine feed aft of the pistol grip/trigger unit) which allowed for easier transport.

Desert Tactical Arms Stealth Recon Scout A-1 (SRS A-1),United States of America

The Stealth Recon Scout (SRS) is bolt-action sniper rifle developed by the American firearm manufacturer Desert Tactical Arms. (Now operating under the name Desert Tech) It was unveiled at the 2008 SHOT Show. It's known for it's bullpup design, which makes the rifle just as accurate as other rifles with similar barrel lengths, but staying as compact as an assault rifle or SMG.

Accuracy International Arctic Warfare 50,United kingdom

The Accuracy International AW50 resides in the same league of heavy battlefield guns that include the well-known American Barrett M82/M107 rifle. These weapon systems are charged with directly engaging armored vehicles, structures or even personnel at distance and delivering a lethal dose of heavy caliber firepower from over a mile away (more in some cases). Despite their large caliber and inherently massive recoil, gunsmiths engineer several key factors into such weapon systems as the AW50 to make them more manageable battlefield instruments.

Steyr AUG Assault rifle, Austria

Like other European nations during the Cold War, the Austrian Army made use of the excellent Belgian FN FAL Battle Rifle firing the 7.62x51mm NATO cartridge. These weapons were produced locally under license as the "StG 58" (Sturmgewehr 58). The original FN FAL was introduced in 1954 and was ultimately produced in over 2,000,000 examples, seeing action in countless conflicts thereafter with widespread circulation still apparent today. Its design was rather robust and her full-power rifle cartridge was a proven man-stopper.

Heckler & Koch G36 Assault rifle, Germany

The Heckler & Koch HK G36 series assault rifle was designed and developed to an exacting German Army requirement of the 1990s intended to replace the outgoing 7.62x51mm HK G3 series battle rifles - the standard German Army service rifle of the time. The 7.62mm cartridge held tremendous man-stopping capabilities and inherently good range but conformance to a NATO standard weapon firing the 5.56x45mm cartridge was in order. Heckler & Koch had given up the 4.7x33mm HK G11 "caseless" system after the collapse of the Soviet Union (funding and interest appropriately dried up).

T-100 Integrated Training System (ITS), United States of America

T-100 Integrated Training System (ITS) is a new two-seat jet trainer for fast-jet training to provide air force pilots with advanced training for fourth and fifth-generation combat aircraft such as F-35 and F-22. The trainer aircraft, along with a ground-based training system (GBTS), is being offered to the US Air Force's (USAF) T-X advanced fighter pilot training programme, which is aimed at replacing the Northrop T-38 Talon; the average age of the T-38 fleet is over 43.5 years.

Kamov Ka-31 Radar Picket Airborne Early Warning (AEW) Helicopter, Russia

The Kamov Ka-31 (NATO reporting name 'Helix') is  a military helicopter developed by Kamov Joint Stock Company (then, Kamov DB) for the Soviet Navy and currently in service in Russia, China and India in the naval airborne early warning and control role. The main mission of the helicopter is long-range detection of threats, including airborne threats such as fixed-wing aircraft and helicopters.