The 5.56×45mm NATO (official NATO nomenclature 5.56 NATO, commonly pronounced "five-five-six") is a rimless bottlenecked centerfire intermediate cartridge family developed in the late 1970s in Belgium by FN Herstal. [5] . It consists of the SS109, L110, and SS111 cartridges.

2024年12月4日 · What are the different types of 5.56 ammo? The 5.56x45mm NATO cartridge is a ubiquitous round, chambered in countless rifles and carbines across the globe. Its versatility stems not only from its widespread availability but also from the sheer variety of ammunition types developed around this caliber.

While the 5.56 NATO is not the typical long-range caliber, it has a relatively flat trajectory out to 500 yards thanks to its lightweight projectiles and relatively high ballistic coefficients. Depending on the load you're firing, you can expect a 55 grain FMJ to drop about 47” at 500 yards when zeroed in at 200 yards.

2024年12月7日 · Get the facts on 5.56 NATO, from its origin and history to its measurements, ballistics, and comparisons to other calibers. The 5.56x45mm ammunition is one of the most widely used and recognized cartridges in the world, with a rich history and a …

2025年2月5日 · Yes, there is a difference between 5.56 and 5.56 NATO ammunition, albeit subtle yet significant, primarily in pressure and chamber specifications, potentially leading to safety concerns depending on the firearm used.

2025年1月28日 · Comprehensive guide to different types of 5.56 ammo, including military specifications, civilian options, and performance characteristics. The 5.56 NATO cartridge, …

2024年2月17日 · What caliber is a 5.56 round? A 5.56 round has a caliber of 5.56 millimeters. What is the difference between 5.56 and .223 ammunition? The main difference is in the pressure levels, as 5.56 ammunition typically has higher pressure than .223.

The 5.56mm round can be used to create either a loophole about 7 inches (178 mm) in diameter or a breach hole large enough for a man to enter. When used against reinforced concrete, 5.56mm rounds cannot cut the reinforcing bars.

2016年7月22日 · First, we’ll tackle the familiar 5.56mm round, a venerable but also controversial caliber designed in the late 1950s for the AR-15 rifle. It’s by far the most popular “black rifle” caliber in the US today, as well as the standard caliber for NATO, the USA, and her allies.

2019年9月18日 · In this guide, we're breaking down everything you want to know about good ole' 5.56 NATO, the round most used by the military and the AR-15 market. Let's figure out what …