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This concurs with the pre-M16A2 maximum effective range of 460 m (503 yd). [112] The Colt 3×20 telescopic sight was factory adjusted to be parallax-free at 200 yd (183 m). [ 113 ] [ 114 ] In Delft, the Netherlands Artillerie-Inrichtingen produced a roughly similar 3×25 telescopic sight for the carrying handle mounting interfaces.
The standard M203 is intended for permanent attachment to the M16A1, ... Barrel only ... Maximum effective range:
Government-specified barrel profile increased to between 0.675 and 0.575 inches; A2: Also referred to as the "government" or "gov't" profile. Barrel profile for which the portion of the barrel in front of handguards is thickened to 0.715 inches; HBAR: A barrel that in some portion is thicker than government-profile, usually underneath the ...
The weapon was essentially a modified M16A1 with a new square handguard to cover the enlarged straight gas tube and almost 1 inch thick heavy barrel to make the barrel less susceptible for overheating and hence increase the sustained or effective rate of fire capability, a carry handle on top of the handguard, with a hydraulic buffer assembly ...
Note *: The effective range of a firearm is the maximum distance at which a weapon may be expected to be accurate and achieve the desired effect. [168] Note **: The horizontal range is the distance traveled by a bullet, fired from the rifle at a height of 1.6 meters and 0° elevation until the bullet hits the ground. [169]
The program was an outgrowth of the desire by both US Army and Navy special operations forces for a rifle with greater effective range than an M4 carbine but shorter than an SR-25. The SPR program appears to have grown out of both the SOPMOD Block I program, and the U.S. Navy SEALs Recon Rifle , a 16" flat-topped M16 carbine.
The quick-change barrel used in the AUG is cold hammer-forged for increased precision and durability, its bore, chamber and certain components of the gas system are chrome-plated (currently nitride on US market rifles). The standard rifle-length barrel features 6 right-hand grooves and a rifling twist rate of 228 mm (1:9 in).
The Marine Scout Sniper Rifle (MSSR) is a Philippine semi-automatic designated marksman rifle developed by the Philippine Marine Corps for their Marine Scout Snipers.Designed in the mid-1990s to replace severely-outdated battle rifles then used as marksman rifles, the MSSR is essentially an M16A1 that has been heavily modified and accurized to serve as a marksman rifle.