Choosing an AR-15 Upper Assembly
A barreled upper is the fastest way to add a caliber or barrel length to your AR-15 — assemble nothing, just pair it with a lower. The main thing to check is whether the BCG and charging handle are included. Here's how to read them.
With or without a BCG and charging handle
Most of these uppers ship "No BCG or Charging Handle," meaning you add your own bolt carrier group and charging handle. Some are sold "with BCG and Charging Handle" and are ready to run out of the box. Check the product title — it's the single most important detail when comparing prices here.
What's in the assembly
A typical assembly includes the upper receiver (with forward assist and dust cover), the barrel, an installed gas block and gas tube, the handguard, and a muzzle device — assembled and ready. BCG and charging handle are included only on the listings that say so. No sights or optics. Confirm the exact contents on each product page.
Barrel length and caliber
Lengths run from 7.5" (pistol) through 10.5", 16" (the common carbine/rifle length), and up to 20". Calibers include .223/5.56, 300 Blackout, 7.62x39, 9mm, and 6.8 SPC II. Twist rates like 1:7 and 1:8 are noted in the title; match length and twist to your intended use.
Handguard options
Handguards come in M-LOK, Keymod, and quad-rail (Picatinny) styles in a range of lengths. M-LOK is the current accessory standard; quad-rail offers fixed Picatinny on all four sides; Keymod is the older slot system. Pick the one your accessories use.
Building it out
Pair an upper with a finished or 80% lower, a lower parts kit, and — if your upper doesn't include them — a bolt carrier group and charging handle. Add a stock or brace to complete the build.
Frequently Asked Questions
Do these uppers include a bolt carrier group and charging handle?
It depends on the listing. Most ship "No BCG or Charging Handle" — you add your own — while some are sold "with BCG and Charging Handle," ready to run. The product title states which, so check before comparing prices.
What's included in an upper assembly?
The upper receiver (with forward assist and dust cover), barrel, installed gas block and tube, handguard, and muzzle device — assembled. BCG and charging handle only if the listing says so. No sights or optics.
Do you need an FFL to buy an AR-15 upper?
No. The upper receiver is not the serialized, regulated part of an AR-15, so a complete upper assembly ships without an FFL transfer. (The lower receiver is the regulated part.) Confirm current rules for your situation if unsure.
Will this upper fit my AR-15 lower?
These are standard AR-15 (mil-spec) uppers, so they fit standard AR-15 lowers. Match the caliber to a compatible bolt carrier group and magazines, and confirm your lower is the same platform (AR-15, not AR-10).
What barrel lengths and calibers are available?
From 7.5" pistol uppers to 20" rifle uppers, in .223/5.56, 300 Blackout, 7.62x39, 9mm, and 6.8 SPC II. Use the subcategories to filter by configuration.
