The FN 15 Military Collector Series M4 is a meticulously crafted semi-automatic rifle designed to replicate the U.S. military's M4A1, offering enthusiasts the opportunity to own a piece of firearm history. Chambered in 5.56x45mm NATO, this rifle features a 16-inch overall barrel with a 14.7-inch button-broached, chrome-lined barrel and a permanently attached A2-style compensator. The barrel has a 1:7 RH twist, ensuring reliable accuracy across a range of ammunition types. The rifle’s receiver is hard-anodized aluminum, with a flat-top design and a MIL-STD-1913 rail at the 12 o'clock position for optics mounting. The UID-labeled lower receiver comes equipped with an ambidextrous selector switch, closely mirroring the select-fire configuration of the military’s M4A1. Weighing in at 6.6 lbs, the FN 15 Military Collector M4 is highly functional and built to handle demanding situations, while its collapsible, 6-position stock allows for a customizable fit. The rifle also features a Knights Armament M4RAS adapter rail with rail covers, enhancing accessory mounting options. Its A2-style pistol grip and ergonomic controls—such as the forward assist and magazine release—add to the rifle’s usability. It ships with an AR-style aluminum magazine that features a low-friction follower for smooth feeding. The rifle's sights include an A2-style front sight and an adjustable rear sight for quick target acquisition. With its attention to detail and performance, the FN 15 Military Collector M4 is an excellent choice for collectors and enthusiasts who want an authentic military-style carbine.