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Jul 7, 2011 · Colloquially we refer to M4A1s with accessories from the first block of the SOPMOD program as 'Block 1,' while using 'Block 2' to describe carbines with the RIS II, one of the last components of the second block of the SOPMOD program to be fielded.
The Block 1 featured the shorter RAS rail from Knights Armament and 14-1/2' M4 barrel with a front sight post. Later, as part of the SOPMOD upgrade program, the SOPMOD Block 2 was introduced, and offered a free floating rail from Daniel Defense.
The M4A1 AR15 style firearm features the RIS II picatinny quad rail, which has been in use by US Special Operations Command (SOCOM) for the SOPMOD Block II program since 2005.
Muzzle Device: Knights Armament NT4 Flash Hider, Surefire Socom 4 Prong Flash Hider Hand Guard: Daniel Defense M4A1 RIS II FDE FSP/Non-FSP Bolt Carrier Group: Colt, FN Charging Handle: Standard GI, PRI Gas Buster Military Latch Rear Sight: Matech, Knights Armament Front Sight: FSP, Knights Full Size Front Sight (Taupe or Black)
Jun 3, 2021 · The later upgrades into the generation known as Block II was the first the popularized free-floating of the M4’s barrel and all the benefits thereof. The distinctive Daniel Defense Rails, both with front sight posts and low profile gas blocks, …
Apr 20, 2022 · The SOPMOD Block I kit was eventually evolved into the more modern Block II kit offering. This brought about different optics, illuminators, sighting devices and the like to further strengthen the M4A1 Carbine SOPMOD line.
The Special Operations Peculiar MODification (SOPMOD) kit is an accessory system for the M4A1 carbine, CQBR, FN SCAR Mk 16/17, HK416 and other weapons used by United States Special Operations Command (USSOCOM) special forces units, though it is not specific to SOCOM.
Let’s move on to the development and implementation of SOPMOD Block II, including my experience with Block II items while deployed to Afghanistan.
One of these modern classics is the M4A1 Block II which has become a modern classic. We have developed our own variant to call back on the glorious quad rails and short CQB-style firearms of the day.
Overview: The M4A1 Block II is an enhanced version of the M4A1 carbine, chambered in 5.56x45mm and designed for special operations forces (SOF). It incorporates upgrades aimed at improving accuracy, durability, and modularity, making it highly adaptable to a variety of combat scenarios.
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