AR-15 buying guide

Most ARs are chambered in 5.56 NATO, which also safely fires .223 Remington (the reverse is not always true — a .223-only chamber shouldn't fire 5.56). A .223 Wylde chamber shoots both at full accuracy and is common on precision-leaning barrels. Beyond that: 300 Blackout is the suppressor-friendly short-barrel choice (subsonic loads pair beautifully with a can — see our suppressor guide), and 6.5 Grendel / 6mm ARC stretch the platform past 600 yards. First rifle? 5.56. Ammo is everywhere and cheap — compare per-round prices in our ammo section.

• Length. 16" is the standard rifle length — handy, full velocity for most uses, and no extra paperwork. Anything shorter is legally a pistol or an NFA short-barreled rifle; know the rules before you go there.
• Profile. Government and lightweight profiles carry well; heavier profiles hold accuracy through long strings. For a do-everything rifle, medium/gov't profile is right.
• Material and lining. Chrome-lined or nitrided 4150 CMV barrels last tens of thousands of rounds. Cold hammer-forged (CHF) barrels are the durability gold standard and show up on duty-grade rifles.
• Twist rate. 1:7 or 1:8 stabilizes the full range of modern 5.56 bullet weights. Avoid 1:12 unless you only shoot 55gr.

On a 16" barrel, a mid-length gas system runs softer and smoother than the older carbine-length setup — less recoil impulse, longer part life. Carbine gas is fine (millions of rifles run it), but if you're choosing between two otherwise equal rifles, take the mid-length. Adjustable gas blocks matter mainly for suppressed shooting.

• Bolt carrier group: look for a properly staked gas key, shot-peened bolt, and high-pressure/magnetic-particle (HPT/MPI) tested components — the spec-sheet shorthand for a BCG that won't be your failure point.
• Receiver extension (buffer tube): mil-spec diameter, properly staked castle nut.
• Trigger: stock mil-spec triggers are gritty but serviceable; a quality drop-in trigger is the single best upgrade money can buy later.
• Warranty and reputation: the AR market punishes corner-cutting quickly. Established brands with lifetime warranties exist at every price point — there's no need to gamble on a mystery roll mark.

• $500–$800: reliable range rifles. Expect carbine gas, basic furniture, mil-spec triggers. Totally legitimate way to get into the platform.
• $800–$1,500: the value zone — mid-length gas, better barrels (often CHF or premium nitride), free-float handguards, improved furniture and QC.
• $1,500+: duty-grade builds with fully tested components, premium barrels, and refined ergonomics. You're paying for consistency and QC, and it's real.

Budget for these with the rifle: a quality optic (a red dot for speed or an LPVO for versatility — see optics), a two-point sling, a weapon light if the rifle has a home-defense role, extra magazines (they're consumables — buy several), and ammo in bulk. All of it ships straight to your door from our accessories section; the rifle itself ships to your local dealer — here's how that works.