Everything we stock for the AR-15 platform is organized under the categories below — jump straight to the part you need without wading through unrelated pistol inventory.
Where to find AR-15 parts
- Upper end: assembled upper receivers in 5.56 NATO, .223 Wylde, 9mm EPC-9 and .300 Blackout, plus stripped barrels and bolt-carrier-group components, M-Lok, KeyMod, quad rail and drop-in handguards, and .750 / .936 gas blocks and pistol / carbine / mid / rifle gas tubes.
- Muzzle: flash hiders, brakes and compensators in the common AR thread pitches — 1/2x28 for 5.56 and 5/8x24 for .30-caliber hosts.
- Controls: standard and ambidextrous charging handles, rear pistol grips plus vertical and angled foregrips, and lower parts kits with or without fire-control groups.
- Rear end: mil-spec and commercial buffer tubes, buffers, springs and stock kits, plus two-piece drop-in and free-float quad rails when a rail-heavy build is the plan.
Match handguard length to gas system before ordering — pistol-length gas needs a short handguard, mid-length gas takes 12"–13", rifle-length calls for 15"+. Free shipping ships on every AR part at 3CR Tactical.
