AR-15 Barrel Nut
The United Defense AR-15 Barrel Nut is a mil-spec steel barrel nut for AR-15 and M4-pattern rifle builds. Machined to standard 1.000"-16 thread specifications with a black phosphate finish, it threads onto any mil-spec upper receiver to secure the barrel and anchor your delta ring or drop-in handguard. The castellated profile indexes cleanly with the delta ring assembly for proper handguard retention. A core component for AR-15 upper builds, repairs, and armorer's spares kits.
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- SKU
- N8448553
$9.95
Description
Features
- Mil-Spec Dimensions — Built to standard AR-15/M4 mil-spec tolerances for direct compatibility with mil-spec upper receivers and delta ring assemblies.
- Steel Construction — Machined from high-strength steel to handle repeated torque cycles and the recoil forces of sustained fire.
- Black Phosphate Finish — Manganese phosphate coating resists corrosion, retains lubrication, and matches the finish of standard mil-spec barrels and uppers.
- Castellated Profile — Slotted teeth index cleanly with the delta ring and weldment for proper handguard retention on standard drop-in setups.
- 1.000"-16 Thread Pitch — Standard AR-15 barrel nut thread spec threads directly onto any mil-spec upper receiver without modification.
- Drop-In Replacement — Direct swap for worn, damaged, or missing barrel nuts on existing AR-15 builds and a staple part for any home armorer's spares kit.
- Wrench-Compatible — Works with standard AR-15 armorer's wrenches for proper torque to spec (30–80 ft-lbs) during installation.
- Build-Ready — An essential component for any AR-15 upper receiver build, securing the barrel to the receiver and providing the mounting point for the handguard.
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Customer Reviews
Top customer reviews
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10 bucks for a mil-spec barrel nut, just grab oneIf your building an upper from scratch you need one of these and at $10 theres no reason to not have a spare in the parts bin. The all steel construction with the black oxide finish is exactly what you'd find on any quality factory upper. Torqued mine down to 35 ft-lbs on my Aero upper with a standard armorer's wrench and it seated perfectly threads were clean with no burrs or cross threading issues. The machining is precise and the indexing teeth lined up with my gas tube on the second torque attempt which is about as good as it gets. Ive built enough uppers to know the difference between a good barrel nut and a cheap one and this is a good one. Add it to your cart next time your ordering parts, future you will thank you
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Great ReplacementIf you've ever done much work on your AR-15, you know that you will eventually need spare parts. When changing out handguards, it's relatively easy to bugger up the teeth on a standard barrel nut. That's where Keepshooting.com comes in. Have a replacement barrel nut ready so that you don't have to deal with the frustration of an incomplete project gun.
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