Firearms Chambered in 5.45x39mm Soviet

The M4A1 is a fully automatic, gas‑operated carbine derived from the Colt M16A2 rifle, designed to provide a lightweight, compact fire‑arm for close‑quarters combat while retaining the 5.56×45mm NATO cartridge performance of its parent platform. Developed primarily for U.S. military special operations and later adopted by conventional forces, the M4A1 features a 14.5‑inch (368 mm) barrel, a collapsible four‑position stock, and a flat‑top receiver with a Picatinny rail for modular accessory attachment. Its distinguishing innovations include a full‑auto only fire‑mode (no three‑round burst), a hardened steel bolt and barrel extension for increased durability, and a cold‑hammer‑forged barrel with a 1:7 twist rate optimized for modern ammunition. The carbine’s reputation rests on its reliability, ergonomics, and adaptability, making it a benchmark for modern assault rifles and a favorite among military, law‑enforcement, and civilian shooters seeking a proven, modular platform.

The AK-47 (Avtomat Kalashnikova model 1947) is a gas‑operated, selective‑fire assault rifle designed around a simple, rugged construction philosophy that prioritises reliability under adverse conditions over ergonomic refinement. Intended primarily for military service, it has also been adopted by numerous law‑enforcement and paramilitary groups, and civilian semi‑automatic variants are widespread. Its key innovations include a long‑stroke gas piston with a rotating bolt, a chrome‑lined barrel and chamber, and a stamped or milled receiver that can be produced with minimal tooling. The AK‑47’s reputation rests on its legendary durability, ease of maintenance, and ability to function with dirty ammunition, which has made it the archetype of a “battle‑ready” weapon. Distinguishing characteristics are its distinctive curved 30‑round magazine, pronounced recoil spring guide rod, and the iconic wooden or polymer stock with a pistol grip that together create a silhouette recognized worldwide.

Often labeled the "KORD" in games like Battlefield, the 6P67 is a 5.45x39mm assault rifle defined by its Balanced Automatics Recoil System (BARS). Internally, a reciprocating counter-weight moves forward as the bolt kicks back, neutralizing the physical "thump" of the action and keeping the barrel dead flat during rapid fire. Externally, it’s a tactical overhaul of the original AEK, featuring a high-impact polymer frame, a side-folding telescopic stock, and a full-length Picatinny rail for optics. It trades the simple ruggedness of an AK for a complex, high-speed mechanical advantage.

A heavy-duty AK-pattern rifle built on a reinforced RPK receiver for sporting and tactical use.

The FN FNC (Fusil Nouveau Carabine) is a 5.56×45mm NATO, gas‑operated, selective‑fire assault rifle developed by FN Herstal in the early 1980s as a cost‑effective, export‑oriented counterpart to the FN F2000 and the earlier FN FAL family. Designed around a short‑stroke gas piston and rotating bolt, the FNC emphasizes reliability, simplicity of manufacture, and ease of maintenance, making it attractive to militaries and police forces seeking a rugged rifle without the expense of more advanced systems. Its distinguishing features include a stamped steel receiver, a folding stock, and a modular handguard that can accept various accessory rails. The FNC earned a reputation for dependable performance in harsh environments, though it never achieved the widespread adoption of contemporaries like the M16 or AK‑74. Its straightforward design and relatively low production cost have kept it in limited service and civilian markets, where it is appreciated for its solid build and familiar ergonomics.

A civilian AK variant known for its versatility and legality in various markets.

The Malyuk (also known as Vulcan-M) is a Ukrainian bullpup conversion of the Kalashnikov AK series assault rifle. Developed by the Interproinvest Corporation, it converts standard AK-pattern rifles into compact bullpup configurations while retaining AK reliability.

The AK-105 is the compact carbine version of the AK-105 chambered in 5.45x39mm. It is the shortened counterpart to the AK-74M, analogous to the AKS-74U but with modern features. The AK-105 has a side-folding polymer stock and a shorter barrel with an effective muzzle brake. It was designed for vehicle crews, paratroopers, and special forces. The carbine offers the same accuracy and reliability as the full-size AK-74M.

The RPK-16 is a Russian light machine gun chambered in 5.45x39mm based on the AK-12 platform. It features a heavy profile 580 mm barrel for sustained fire and improved accuracy. The weapon uses a 45-round box magazine or a 96-round drum for high capacity. It has a Picatinny rail system on the handguard for mounting optics and accessories. The RPK-16 can be configured with either a long barrel for the LMG role or a short barrel for assault use.

The RPK-74 is a Soviet light machine gun developed by Mikhail Kalashnikov. It is the 5.45x39mm variant of the earlier RPK light machine gun. The RPK-74 shares approximately 75 percent parts commonality with the AK-74 assault rifle. It features a longer, heavier barrel, a bipod, and a reinforced receiver for sustained fire. The weapon uses a 45-round magazine or a standard 30-round AK-74 magazine. It was designed as a squad-level support weapon for the Soviet military.

The RPK-74M is a modernized light machine gun variant of the AK-74 rifle, developed by the Kalashnikov Concern in Russia. It is an improved version of the RPK-74, featuring a side-folding polymer stock and a reinforced receiver. The RPK-74M is chambered in 5.45x39mm and uses the same ammunition as the AK-74 assault rifle. It has a longer and heavier barrel than the AK-74 for sustained automatic fire. The weapon is designed to provide squad-level automatic fire support.

The RPK (Ruchnoy Pulemyot Kalashnikova) is a squad automatic rifle derived from the AK‑47 family, designed to provide sustained fire support while retaining the rugged simplicity of its assault‑rifle counterpart. Developed by the Kalashnikov Design Bureau in the early 1960s, the RPK features a longer, heavier barrel, reinforced receiver, and a bipod, enabling higher rates of fire and improved accuracy at the squad level. Chambered primarily in 7.62×39mm, it uses the same gas‑operated, rotating‑bolt system as the AK‑47 but with a heavier bolt carrier and a larger gas piston to handle the increased heat. Its reputation rests on exceptional reliability under adverse conditions, ease of maintenance, and logistical compatibility with standard AK magazines and ammunition, making it a staple in Soviet and Warsaw‑bloc forces. The weapon’s distinctive features include a stamped steel receiver with reinforced ribs, a detachable steel bipod, and a unique muzzle device that can accept a flash suppressor or a rifle grenade launcher, underscoring its versatility as both a light machine gun and a rifle grenade platform.