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SHOP NOWThis video examines FN’s Individual Weapon System chambered in the 6.5x43mm Lightweight Intermediate Caliber Cartridge. It compares the design to platforms like the SCAR, AK-47, and SIG Spear while outlining its intended role in irregular warfare.
The discussion opens by framing FN’s new Individual Weapon System as a hybrid concept between an FN SCAR and an AK-47. The rifle is chambered in the Lightweight Intermediate Caliber Cartridge, a 6.5x43mm round also referred to as .264. The host questions whether this system is FN’s shadow entry into the U.S. Army’s Next Generation Squad Weapon program, which ultimately selected the SIG Spear and SIG Spear LT. The IWS was developed for the Irregular Warfare Technical Support Directorate, formerly the Combating Terrorism Technical Support Office. That organization focuses on rapidly developing capabilities for irregular warfare and supporting U.S. military and interagency partners. The implication is that this weapon is intended for specialized, often low-visibility operations rather than conventional frontline units.
Attention then shifts to the 6.5x43mm cartridge itself. It is compared to 6.5 Creedmoor, which is 6.5x48mm, highlighting that the dimensions are similar but not identical, raising questions about downrange performance differences. The host notes how relatively small dimensional changes can matter, citing 7.62x35mm .300 Blackout versus 7.62x39mm as an example. The LICC case uses a two-piece stainless steel head and body, chosen for significant weight reduction compared to brass, at the cost of practical reloadability because steel does not reform like brass. The cartridge evokes AK-style steel ammunition. Four initial loads are mentioned: a 130-grain reduced-ricochet, limited-penetration round; 109-grain and 120-grain copper open-tip match loads; and a 125-grain soft-nose load, each likely tailored to different mission requirements.
The FN IWS is described as a modular platform offered in three primary barrel configurations. There is an 11.5-inch close quarters battle rifle, a 14.5-inch carbine, and an 18.5-inch configuration referred to as a designated marksman or WKY/DMR-style setup. Depending on configuration, overall weight ranges from roughly 7 to 9 pounds. The different 6.5x43mm loads appear intended to complement these barrel lengths, with heavier or lighter projectiles potentially chosen to optimize terminal effect or energy retention for specific mission profiles. The host notes that detailed ballistic data from FN or the ammunition manufacturer has not been released, leaving many performance questions unanswered. There is interest in eventually comparing 6.5x43mm directly to 6.5 Creedmoor once ammunition and rifles become more accessible.
Mechanically, the IWS departs from the FN SCAR’s short-stroke gas piston and instead uses a long-stroke piston system similar to the AK-47. This choice is highlighted as a nod to the AK’s reputation for reliability and relatively clean operation. FN is said to be working with outside partners on ammunition development, though specific companies are not confirmed. The host speculates that major manufacturers like Hornady or Federal could be involved but emphasizes that this is only an assumption. For suppression, FN appears to be collaborating with HuxWrx (Hux Works) on a flow-through silencer. One requirement from the Irregular Warfare Technical Support Directorate was that the weapon remain under 140 dB when fired, and HuxWrx silencers are cited as measuring around 139.9 dB, meeting that threshold for a largely hearing-safe system.
The IWS incorporates fully ambidextrous controls and a redesigned lower receiver. The magazine well is unique to the new cartridge, and the control layout differs from rifles like the SIG Spear and SCAR. An ambidextrous bolt release on the right side appears to sit near the front of the trigger guard, an unusual placement compared to the SIG Spear’s bolt release location. The charging handles are also ambidextrous and non-reciprocating, with one on each side, eliminating the need to swap sides as on some other platforms. Unlike the SCAR’s forward, upper-mounted charging handle, the IWS places them farther back, roughly at the top of the lower receiver, which is suggested to be more ergonomic. The stock is designed as a quick-detach assembly that can fold to either the left or right side, giving users flexibility to avoid interference with gear, parachutes, or other equipment.
The upper receiver of the FN IWS is described as a monolithic unit with a continuous 12 o’clock Picatinny rail running the full length of the receiver and handguard, along with M-LOK attachment slots. FN plans three upper configurations corresponding to the 11.5-, 14.5-, and 18.5-inch barrels, and the system is intended to allow rapid field swapping between them. A single lever on the right side of the receiver appears to control separation of the upper assembly, enabling quick conversion from a compact CQB setup to a longer DMR-style configuration. While this promises modularity, the host raises concerns about durability and accidental activation, wondering whether crawling or contact with rocks could inadvertently trip the lever and open the rifle. Many details, including exact manipulation of the takedown system and long-term reliability, remain unanswered pending further testing and more extensive trials.
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