Over the years, the AR-15 has proven to be one of the most versatile and reliable rifles on the market. Utilized by various marksmen ranging from combat units to hunters and competition shooters, the popularity of the AR-15 is no surprise considering its effectiveness and even more so due to its customizability. More than almost any other weapon, AR-15 shooters can change, upgrade, and swap out nearly every rifle feature to fit their needs, improve their accuracy, and personalize their rifles. While the opportunities for modifications are endless, one of the most popular aspects to adjust is the AR-15 caliber. Here, we want to take a look at what calibers are available for the AR-15, what they are used for, and which is best for you.
What Is A Rifle’s “Caliber?”
Simply put, the caliber of a rifle is the diameter of the hole drilled into the barrel of the gun. However, the “cartridge,” or bullet, is often used interchangeably with the “caliber” of a rifle in conversation. Typically measured in inches and millimeters, the larger the caliber, the bigger the cartridge, and, the more powerful the shot. This means not all calibers or cartridges are created equal, as AR-15 calibers for deer hunting may be larger than an AR-15 caliber designed for target practice at the range.
The Most Popular Calibers For An AR-15
While there is an array of types of caliber sizes, shapes, and designs, from combat calibers to hunting rounds, there are several calibers that remain tried and true by countless AR-15 marksmen. Some of the most favored calibers in use today include:
5.56 NATO
Typically regarded as the standard AR-15 caliber, the 5.56 NATO round is commonly used by the military, police, and civilians, as it is lightweight, accurate, and has minimal recoil. Excelling in medium-range shooting situations, it is a great all-around caliber for shooters looking for a standard AR-15 caliber they can count on.
6.5 Grendel
The 6.5 Grendel came about out of the desire to give the AR-15 more accuracy from a greater distance. A shorter round with a larger diameter to hold more gunpowder, this cartridge is known for shooting straight, fast, and far, making it a particularly popular AR-15 caliber for deer hunting. Being effective up to 1,000 yards, the 6.5 Grendel is also a favorite of long-range marksmen and competition shooters.
.22 LR
The .22 LR (Long Rifle) cartridge is a favorite among shooters for a reason. With its extremely low recoil, quiet report, and impressive accuracy, it’s perfect for beginners, target practice, small game hunting, and pest control. Add in its affordability, and you’ve got a round that makes practicing easy and enjoyable without breaking the bank.
.50 Beowulf
Fierce like its namesake, the .50 Beowulf is no standard AR-15 caliber. Designed with stopping power in mind, this cartridge packs a punch and is not for the faint of heart. A go-to for big game hunters or someone looking to stop an intruder in their tracks, the .50 Beowulf will get the job done.
.458 SOCOM
Designed and implemented by the United States military, this caliber is meant to be taken seriously. When it isn’t being used in combat, the .458 SOCOM is an AR-15 caliber regularly used as a hunter’s defense against bears for its power and rapid-fire capability. Typically not purchased for casual use, the .458 SOCOM is a deadly cartridge that is so large that it limits the magazine capacity of a standard AR-15 build.
.300 Blackout
As intimidating as it sounds, .300 Blackout is not your typical deer hunting AR-15 caliber. This is a cartridge designed to do maximum damage with incredible stopping power and accuracy. The result is a much larger and stronger bullet that doesn’t require being fired at high velocity to still be extremely effective in close and medium range. This is an AR-15 caliber that means business and comes with a high price tag to prove it.
.350 Legend
The .350 Legend is a few steps above a standard AR-15 caliber and designed with the hunter in mind. A straight-wall centerfire cartridge is a type of ammunition that will have you bringing home veal for the whole family. While this caliber can do some serious work out in the bush, it is also designed to be fired with accuracy with a suppressor, making it appealing for self-defense uses.
.450 Bushmaster
Taking heavy inspiration from Jeff Cooper’s vision for a one-shot bullet for large animals, the .450 Bushmaster is a heavy-duty AR-15 caliber. Ideal for hunting large game at close to medium range, the .450 Bushmaster will stop just about any animal you come across in its tracks. To top it off, despite its power, it creates minimal recoil to increase its accuracy.
Ultimately, the caliber you choose from your AR-15 is a very personal decision. It all depends on what you are aiming to accomplish. whether you need a specialized AR-15 caliber for deer hunting, target practice, or home defense, there is an AR-15 caliber for the job. Don’t hesitate to experiment until you find what works for you. Happy shooting!
Why Shop From Wing Tactical?
At Wing Tactical, we pride ourselves on offering a wide range of guns, parts, and accessories for your next custom firearm build. From barrels to stocks, muzzle brakes, and more, we have what you need. Unsure how to kick off your custom firearm build or what AR-15 caliber to choose? Our weapons experts are at your service.
Furthermore, our satisfaction guarantee supports every gun part we offer, so you can be confident with each purchase you make. From top-of-the-line barrels to triggers and charging handles, the team at Wing Tactical specially curates our selection to bring you high-quality parts you can rely on when you need them most. Shop your firearm parts from Wing Tactical online today to upgrade your loadout. Don’t hesitate to contact us for help and upgrade your weapons to their full potential.