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The standard-issue rifle for U.S. Servicemen in Vietnam. Designed by Eugene Stoner as the Ar-15 to replace the M14 (which was difficult to control while in full-auto). The rifle fired .223 caliber ammunition, which later became the 5.56 mm NATO round in widespread use today. The M16A1 "spawned" the current U.S. service rifle, the M16A2, as well as the A3 (full-auto A2), and the M4 Carbine, which is in use by Special Forces units around the world.
The M16A1's jamming problems had nothing to do with the design of the gun, the U.S. Government had told troops that the rifle was self cleaning, therefore the troops were not issued cleaning kits until 1968. After the kits were issued, jamming reports were nearly unheard of.
M16A1 by My name May 17, 2006
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Noun-Eugene Stohner's pride n' joy... the M16A2 is a later version of the M16A1, the M16A2 is slighty more reliable than the A1, another notable difference is the firing modes... A1 goes on full-auto, while the A2 is limited to 3-round-burst, this is because in the Vietnam conflict soldier's would needlessly waste thousands of rounds, because of the thought that Charlie may be hiding anywhere... and the ratio of rounds to kills was about 1,000 rounds for one kill.
That M16A2 is a Colt!
Related Words
The modernized, updated version of the AR15 platform, currently in use by the United States Army and Marine Corps. While in less numbers than the M16A2, and generally only used by frontline units, it is arguably better than its predecessor. The M16A4 features a picatinny rail, a railed fore grip, detachable sights, and a 1:7' rifling, rather than the 1:12' and 1:9' rifling previous models had, which equates to better power and accuracy. The M16A4 is, essentially, an M16A3, but with a safe/semi/3-round burst selector switch, rather than a safe/semi/fully-automatic switch.

Standard magazine capacity is 30-rounds of M855 or Mk. 262 5.56x45mm ball ammunition. It is gas-operated, with a rotating bolt. It is air-cooled, with an external, detachable magazine, peep hole sights, a forward assist, and a charging handle mounted on top of the receiver, behind the picatinny/carrying rail.

Reliability in the M16A4 is solid; one is capable of firing upwards of 1,000 standard, ball rounds through a decently maintained rifle, with STANAG magazines, without a single jam or malfunction. While disputably not as good as the AK platform, it is a far cry from the M16(A0), and is a step up from the M16A2.
The M16A4, along with its predecessors, spare the M16(A0) are unworthy of the negative press they receive. They are great rifles, but the first version, which was heavily modified by Lyndon Johnson's DoD, has stained the M16/AR15's reputation, due to the reliability issues faced previously.
M16A4 by Amerikaner September 9, 2006

M1A1/2 Abrams MBT 

A tank that provides heavy armor superiority on the battlefield.






M1A2

Mission
Provide heavy armor superiority on the battlefield.It entered Army Service in
1980.The Abrams tank closes with and destroys enemy forces on the integrated battlefield using mobility, firepower, and shock effect. There are three variants in service: M1, M1A1 and M1A2. The 120mm main gun on the M1A1 and M1A2, combined with the powerful 1,500 hp turbine engine and special armor, make the Abrams tank particularly suitable for attacking or defending against large concentrations of heavy armor forces on a highly lethal battlefield.

Features of the M1A1 modernization program include increased armor protection; suspension improvements; and a nuclear, biological and chemical (NBC) protection system that increases survivability in a contaminated environment. The M1A1D modification consists of an M1A1 with integrated appliqué computer and a far-target-designation capability.

The M1A2 modernization program includes a commander's independent thermal viewer, an improved commander's weapon station, position navigation equipment, a distributed data and power architecture, an embedded diagnostic system and improved fire control systems.
The M1A1 Abrams cut through the Repubican Guard of Iraq easily with only having 3-4 tanks disabled.
Tank, Full-Tracked, 120mm M1A1.

The M1A1 Abrams is by far the workhorse of the United States Army's Armored Force. All tanks used in the initial invasion Of Iraq in OIF were A1's. Not the High tech M1A2SEPs of the 4th ID or the M1A2s of the 3rd ACR.

Prooving that CITVs and FBCB2s are not needed to annailate enemy armies.

The M1A1 is equpied with the M256I 120mm smoothbore cannon which has a effective range of 3870 meters because this is the highest range the ballistic computer can compute when creating the firing solution.

The Commander's weapon is the M2 Caliber .50 Heavy Machince Gun or "Ma Duece" with the M-10 charging feature. This gives the Tank Commader an advantage over A2 TCs, there is a sight for the machine gun inside the tank allowin percice aim and steady fire out to tracer burn out at 1200 meters. On the A2 the FLEX M2 must be used so the TC is basicly shooting from the hip.

The gunner, or GOLF, has a M240 machine gun mounted coaxialy of the main gun. Meaning where ever the target retical is aiming the COAX and the main gun are both aiming there. Tracer burn out is at 900 meters however kills have been confirmed at 1200 meters.

The Loader is equiped with a M240 Machine Gun as well. It gives him somthing to hold on to. This weapon is used as a scare the enemy with noise weapon. Becasue shooting the gun is never practiced and the weapon mounted there in in acurate.

Tanks are the true problem solvers
It took 4 hours to get the 88 to our location so we can pull the pack from the damaged M1A1
m1a1 by Stryker Grunt November 28, 2004
A modern, modular assault rifle, in use by active duty, frontline units in the US Army and Marine Corps. It is the forerunner to the M16A2, which was in use from the early 1980's, to even now. While in less use than the M16A2, it is more effective.

Arguably a better rifle than its predecessors, the M16A4 is a rifle based on the AR15 platform. It features removable sights, a picatinny rail, fore grip rails, detachable carrying rail, and is slightly higher quality than the M16A2, all around. It utilizes a direct gas-diversion system, along with a rotating bolt. The magazines are generally 30-round ones, loaded with Mk. 262 or M855 5.56x45mm ball ammunition. It has a safe/semi-automatic/three-round burst selector switch.

Reliability in the M16A4 is solid; one is capable of firing upwards of 1,000 standard, ball rounds through a decently maintained rifle, with STANAG magazines, without a single jam or malfunction. While disputably not as good as the AK platform, it is a far cry from the M16(A0), and is a step up from the M16A2.
The M16A4 isn't worthy of its tarnished reputation, in reality. The M16 was an AR15, heavily modified from Eugene Stoner's designs, by Lyndon Johnson's DoD.
M16A4 by Amerikaner September 17, 2008
one of the best standard issue assualt rifle in world... you just need to keep it clean.
The M16A2 ownz that ugly AK74SU!
M16A2 by Dean August 4, 2003
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