AR-15 Versatility: Competition, Hunting and Home Defense
Part 1 covered where the AR came from. Part 2 covered how it’s built. This one is the shortest and the most fun: what you actually do with an AR-15. Because “America’s rifle” wears more hats than any other long gun on the market — and the same lower receiver you use at USPSA on Saturday can be the same one you carry into the coyote flats on Sunday.
Four Main Missions
- Sport shooting — 3-gun, PRS gas gun, service rifle, plate matches.
- Hunting — varmints, predators, hogs, and (in the right cartridge) big game.
- Home defense — short, light, low recoil, easy to run under stress.
- Training & recreation — plinking, teaching a new shooter, ranch chores.
- Six rounds. 2 CCR 406-2-203.A.1: “any semiautomatic rifle used shall not hold more than six (6) rounds in the magazine and chamber combined” when hunting big game. A standard 30-round magazine in the rifle makes it illegal for elk, regardless of how many rounds are in it.
- Fifteen rounds. C.R.S. 18-12-301/302 defines a “large-capacity magazine” as one capable of accepting more than fifteen rounds, and restricts sale, transfer and possession. That is a separate, older law from SB25-003.
Read the current CPW regulations and the statutes themselves — they are the authority, not us.
01Sport & Competitive Shooting
The AR-15 is American action shooting. 3-Gun and multi-gun matches run pistol, shotgun, and rifle stages back-to-back on the clock — and the AR is the rifle of choice for its speed, low recoil, and easy optic mounting. Service Rifle competitions, PRS Gas Gun, and everything from local plate matches to USPSA all lean on the platform. Because uppers swap in and out, you can literally have a match upper (16″ fluted, LPVO) and a training upper (14.5″ plain-jane) on one lower.
02Hunting with an AR
Predators & Varmints
The 5.56/.223 chambering was made for this. Coyotes at 300 yards, prairie dogs at 400, ground squirrels on a hot summer afternoon — a light, semi-auto AR with a good scope is a predator caller’s best friend.
Deer & Larger Game
For deer, hogs, and in the right hands elk, you swap the upper for a bigger cartridge. 6.5 Grendel and 6mm ARC are the two that show up most here — both are capable deer and antelope rounds, and both are elk cartridges only at honest, close ranges by a shooter who knows exactly where their energy falls off. .300 Blackout is the suppressor-friendly timber option. .350 Legend and .450 Bushmaster exist mostly to satisfy straight-wall cartridge rules in Midwestern states — Colorado is not one of them, so here they’re a thumper option rather than a requirement.
Colorado Big Game Rifle Minimums — 2 CCR 406-2-203.A.1
- Semiautomatic round limit: no more than six rounds, magazine and chamber combined.
- Elk and moose: .24 caliber or larger, expanding bullets of at least 85 grains, rated impact energy at 100 yards of at least 1,000 foot-pounds.
- Deer, pronghorn and bear: .24 caliber or larger, expanding bullets of at least 70 grains, same 1,000 foot-pound requirement at 100 yards.
Run your specific load through those numbers before you buy an upper for a hunt. The published ballistics for your exact bullet weight and barrel length are what matter, and the regulation is the authority.
— Elk River Guns
03Personal & Home Defense
The AR-15 is popular for home defense for the same reason law enforcement carries a variant in every patrol car in America: it’s light, low recoil, easy to shoot accurately under stress, and endlessly configurable. Add a weapon light and a red dot, keep it in a quick-access safe, and you have a defensive tool that a small-framed shooter can run just as effectively as a big one. Modern hunting/defensive 5.56 loads (Federal Fusion, Hornady TAP, etc.) have solved the over-penetration concerns of a generation ago.
04Community & Culture
The AR-15 sits at the center of an entire American shooting-sports ecosystem — training schools, matches, YouTube channels, forums, and shops like ours. It’s the rifle new shooters cut their teeth on and the rifle old shooters keep in the safe long after they’ve moved on to bolt guns. It’s the reason “gunsmith” is a growing trade. And it’s, quite simply, America’s rifle.
05The Rest of the Series
Your Next AR Starts Here
1320 Dream Island Plaza • Steamboat Springs, CO 80487
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Regulations cited: 2 CCR 406-2-203 (big game manner of take), C.R.S. 18-12-301/302 (magazine capacity), C.R.S. 18-12-116 (SB25-003). Firearms and wildlife law change; the current CPW brochure and the statutes themselves are the authority, and a qualified Colorado attorney is the right place for anything unusual. Nothing here is legal advice.