SOPMOD is a kit issued to customise m4's for special operations, and more recently regular infantry use. It contains an array of attachments including IR laser pointers, silencers, ACOGs and reflex sights. Special operations use the M4A1 variant which is virtually the same as the regular M4 but has the ability to fire fully automatic.
M4 is the carbine- shorter barrel
Their is no NATO M4. NATO countries that use the M4 either contract the purchase or license the production.
The M4 is capable of automatic fire, the AR 15 is not
It stands for Special Operations Peculiar Modification. It is a accessory system for the M4 and the FN SCAR. As the name suggests, it is commonly used in special op missions. Source: Wikipedia
The M4 is basically a carbine version of the M16A2 rifle, and was developed both to reflect the development of the M16A2 over the previous M16A1, and to correct deficiencies which had been identified with the XM-177 (which was the carbine variant of the M16A1).General differences between the M4 and M16 include:M4 has a four position collapsible buttstock (vs. the fixed buttstock of the M16)The weight of the buffer is different in the M4 than the M16The M4 has shorter handguardsThe M4 has a shorter gas systemThe M4 has extended feed ramps cut into the upper receiver for ease of chambering rounds.The M4 has a 14.5 inch barrel, vs. the 20 inch barrel of the M16The M4 has an "F" marked front sight base, which is designed to compensate for the difference in sight radius between the M4 and M16The M4 has an indentation in the barrel profile to facilitate the mounting of an M203 grenade launcher.Some people often cite the removable carry handle of the M4 as one difference, but the first production run of M4 carbines had the same fixed carry handle as the M16A2 (I was actually issued one when I was in the FL National Guard).
they are bothe very similar but i would have to say the m4 because of higher power and it is used by the military not like the ar-15 which is mostly used by law enforcement. It depends on the m4 though because there is a very wide variation of models of the m4 unlike the ar-15 which is one basic model... there isn't much difference between the m4 carbine and the ar-15
An M4A1 has semi and full auto capabilities, the M4 has semi and three shot burst capability, both are used by the modern U.S. Military. An M-14 is an infantry rifle used in Vietnam and Korea.
100 miles taking A483 NEWTON from Welshpool to M4, and then the M4 MOTORWAY to Swansea.
AR-15 = Semi-Auto civilian rifle M4 = Select Fire Military rifle
An M4 is a military carbine that is a shorter varient of the M16 Assault Rifle, this carbine is shorter and lighter, allowing it to be highly adaptable in missions, this is why it is often used in special forces operations, in wich they are often modified with the SOPMOD (Special Operations Peculiar MODification).
The R17 has a retractable stock like any other m4. They are both made by the same company (well).
The basis of the M4 is the M16 rifle, for which Eugene Stoner is commonly credited. Development of the M4 was a cooperative effort between the Special Operations Community of the United States Armed Forces and Colt's Firearms.