MK4A1

The **MK4A1** is an assault rifle chambered for the 5.56x45mm SDC designed for urban combat scenarios, building upon the success of the MK4. Introduced as a modern upgrade, it incorporates key improvements to enhance its performance in close and medium-range encounters.

In the world of *Iron Hammer: Modern Warfare*, it was already a slightly obsolete assault rifle that saw use within PMCs, rebels and criminals who have a decent amount of wealth and organisation.

## Design

The MK4A1 is a carbine variant that continues to serve as a highly effective solution for urban combat, particularly in scenarios characterized by medium and close-range engagements. It emerged as a suitable response to the ever-evolving needs of military forces operating in urban environments.

The MK4A1 retains the core features that made the MK4 an ideal choice for urban combat while introducing several key enhancements.

A significant addition to the MK4A1 is the detachable carry handle sight. This feature offers versatility and adaptability, allowing the user to quickly switch between different sighting options, including optics or other ancillary devices. The detachable carry handle sight enhances the carbine's adaptability to various combat situations.

The addition of an M6 RAS (Rail Adapter System) quad-railed handguard is another notable upgrade. This full rail system provides a platform for mounting a wide array of accessories, including optics, tactical lights, vertical grips, and other ancillary devices. The M6 RAS handguard enhances the carbine's functionality, offering additional customization options to suit the mission's specific requirements.

The adjustable stock, a feature carried over from the original MK4, remains a key element of the MK4A1's design. It allows for customization based on the individual user's preferences and the unique demands of different engagement scenarios. The stock enables comfortable shouldering and quick target acquisition, crucial in close combat situations. It now uses the VLTOR v.1 buttstock in the military model.

The MK4A1 maintains its compact and maneuverable size, making it well-suited for urban operations. Its shorter barrel length and adjustable stock ensure that soldiers can effectively navigate and engage in tight spaces.

### Specifications

* Length: 759-839mm
* Caliber: **5.56x45mm SDC**
* Effective Range: 500 Meters
* Weight: **2.98** kg

## Trivia

### General

* The MK4A1 became a moderately favoured assault rifle in the early 2000s. But when the year reached 2010, it was already overshadowed with various MK4 type rifles from other manufacturers, such as XRK, Automaton, and FORGE Systems.
* The MK4A1 represents a contemporary and adaptable solution for urban combat, with a focus on close and medium-range encounters. Its design incorporates enhancements that cater to the needs of modern military forces operating in complex and challenging urban environments. The MK4A1 builds upon the legacy of the MK4, offering improved versatility and functionality, further solidifying its role as a reliable and effective carbine for modern warfare.
* The 14.5" barrel of the MK4 and MK4A1 carbines, along with the relatively short gas system, leads to overheating issues during sustained firing. The proximity of the handguard, gas system, and gas block to the chamber exacerbates this problem. To mitigate overheating, users often switch to semi-auto fire or consider adopting a mid-length gas system and longer railed handguard for improved cooling and handling.
* The MK4A1 nonetheless became a mainstay on law enforcement, usually equipped with a Bushnell Holographic sight and various accessories.
* Using accurised ammunition will NOT make it more accurate than a 16 or a 20 inch barreled rifle of the same caliber, which contradicts most claims.
* The gas system is too short for the barrel, making it easy to overheat from automatic fire. In this case, it would overheat from 30-60 rounds of continuous automatic fire and controlled bursts or simply firing in semi auto would help trim down the problem.