Brownells is the big Iowa gun parts and gunsmithing supplier that started as a mail order business for gunsmiths. AR builders know it for carrying almost everything plus its own Brownells branded parts like the BRN-180 upper.
Brownells was established in 1939.
Market positioning: Mid-Tier.
Brownells has 761 products available on GunPartPicker, ranging from $0.35 to $1839.99.
Stock status: 264 in stock, 497 out of stock.
Community rating: 4.0 out of 5 based on 2 reviews.
Brownells ranked #70 of 323 brands on GunPartPicker in September 2026, just behind FN America, with about 1 in every 500 parts builders added. Down from #58 in August. Builders reached for Brownells mostly for end plate parts. The most added single part was the AR-15/M16 Receiver End Plate - Brn Car-15 Receiver End Plate, taking the top spot from the M16 Mil-Spec MP BOLT CARRIER GROUP.
Upper receivers saw no restocks all month. About 35% of the 761 Brownells products we track are in stock today.
Also popular this month: Brownells AR-15 A2 Pistol Grip Black, Brownells AR-15 Bolt Catch Mil-Spec, 308AR BOLT CARRIER GROUPS and Brownells M4 Buttstock Black.
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Brownells is the big Iowa parts and gunsmithing supplier that carries almost everything, plus its own Brownells branded parts like the BRN-180 upper.
Founded 1939, Montezuma, Iowa · Retailer and parts maker · Guaranteed Forever returns · Gunsmithing supplies
Brownells has supplied parts and gunsmithing tools from Montezuma, Iowa since 1939. Beyond carrying nearly every brand, it sells its own Brownells branded parts and uppers.
The BRN-180 is the standout. It's a short stroke piston upper based on the AR-180 that drops onto any mil-spec AR-15 lower, with twin guide rods and no buffer tube, so it fires with a folding stock folded.
It has a .223 Wylde chamber, 1 in 8 twist, a side charging handle and a free float M-LOK handguard, and it was designed with PWS and FM Products.
Brownells bolt carriers run about $120 against roughly $200 for the typical one, and its uppers sit right at the typical $400.
Guaranteed Forever lets you return almost anything Brownells sells except guns, ammo and powder, for a refund within 45 days or store credit after.
We'd buy a Brownells carrier for a budget build, and the BRN-180 if you want a folding AR on the lower you already own.
Top Brownells products builders are adding
User Ratings
Just got this Brownells BCG. Seems really solid, nice finish and good weight. Cycled great in my upper, no issues with 300 rounds so far. Definitely reliable. Maybe a bit more money than other brands but you get what you pay for.
got this handguard a few months back. it's ok i guess, not bad but not amazing either. fits my upper well enough and the mlok slots are nice. seems durable. no complaints really, just not like totally blown away you know? it's a solid 4 star for me.