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SOPMOD Block I Phased Replacements. Daniel Defense M4A1 RIS II (Rail Interface System), GL/SSC RIS II (Grenade Launcher/Sound Suppressor Capable), and MK18 RIS II (with FSP (front sight post) variations) free-float handguards [7] [8] [9] [10]
The M4 carbine (officially Carbine, Caliber 5.56 mm, M4) is a 5.56×45mm NATO assault rifle developed in the United States during the 1980s. It is a shortened version of the M16A2 assault rifle. The M4 is extensively used by the US military , with decisions to largely replace the M16 rifle in US Army (starting 2010) and US Marine Corps ...
The Close Quarter Battle Receiver (CQBR) [5] is a replacement upper receiver for the M4A1 carbine developed by the US Navy.. The CQBR features a 10.3 in (262 mm) length barrel (similar to the Colt Commando short-barreled M16 variants of the past) which makes the weapon significantly more compact, thus making it easier to use in, and around, vehicles and in tight, confined spaces.
The United States military, as well as other special forces and police around the world, use KAC RIS/RAS conversions for many popular firearms, including the American M16/M4 rifles and Heckler & Koch MP5 series submachine guns. The RIS/RAS system allows for the mounting of accessories to firearms without additional tools or modifications.
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. Early models ...
In 2018, the Upper Receiver Group-Improved (URG-I) is a U.S. Army Special Operations Command (USASOC) program to further improve the durability and reliability of the SOPMOD Block II by introducing additional component improvements. First fielded in the same year, the main improvements are the lighter Geissele Mark 16 free-float rail that ...
3 JSDF's SBU operators armed with M4 carbines next to a US Army Green Beret operator from 1st Battalion, 1st SFG (A) armed with his SOPMOD Block II variant M4A1 disembark from an MH-60S helicopter to take up fighting positions during the Rim of the Pacific (RIMPAC) exercise.
The AN/PEQ-2 has two infrared laser emitters;one narrow beam used for aiming the rifle and one wide beam used for illuminating targets, like a flashlight. [9] The beams can only be seen through night vision goggles. [9] Each beam can be zeroed independently, and the illuminator's radius is adjustable. The two lasers are tied into one 6-mode ...