New Brownells BRN-9 Upper


The Brownells BRN family of upper receivers continues to grow with the addition of the BRN-9. This 9mm upper joins the 5.56, .300 BLK, and 7.62×39 options which are already available. Let’s take a closer look at what the BRN-9 brings to the table.

Brownells @ TFB:

Like the other BRN uppers, the BRN-9 does not require a buffer tube / receiver extension. This means it can fire with the stock folded. However, it also works on all standard AR lowers and would work with a standard AR stock if that is the user’s preference. As one would expect, the BRN-9 barrel is threaded 1/2×28 for easy suppressor compatibility.

New Brownells BRN-9 Upper

The BRN-9 also feeds from a broad range of magazines. Yes, that includes Glock mags. However, options like the MP-5, Colt SMG, and CZ Scorpion are also on the menu, provided that the lower functions with them.

New Brownells BRN-9 Upper

From the manufacturer:

Machined from- billet 6061 T6 aluminum, black hardcoat anodized

Nitrided 4140 steel bolt

Lightweight Nitrided 4150 steel barrel with 1-10″ rifling & ½-28 tpi muzzle threads

Continuous M1913 Picatinny top rail

M-LOK® slots on bottom & sides of handguard

Compatible with 9mm Glock®, Colt 32-rd SMG, CZ Scorpion, Heckler & Koch MP5, Mean Arms EndoMags & SIG Sauer P320 magazines

Self-contained blowback operating system – NO buffer tube needed!

Non-reciprocating steel charging handle

Compatible with standard “mil-spec” AR-15 or BRN-180 lower receivers

Works with last-round-bolt-hold-open lower receivers

Preserves function of bolt catch

Tapered multi material 4-piece trunnion system to maintain mechanical accuracy & longevity

Rear recoil buffer is 3D-printed from flexible material optimized to absorb recoil impulse

Over-buffer-tower design maximizes rail space

BRN-style brass deflector

Easy toolless takedown

The BRN-9 is in stock as of this writing, with a retail price of $550. You can find it here.

All images via

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