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 773 products available on GunPartPicker, ranging from $0.34 to $3868.95.
Stock status: 253 in stock, 520 out of stock.
Community rating: 4.0 out of 5 based on 2 reviews.
Brownells ranks #63 of 518 brands on GunPartPicker so far in October 2026, just behind Trijicon, with about 1 in every 333 parts builders added. Up from #70 in September. Builders are reaching for Brownells mostly for upper receiver parts. The most added single part is the Brownells Glock 19 Slide with RMR Cut, taking the top spot from the AR-15/M16 Receiver End Plate - Brn Car-15 Receiver End Plate.
Bolt carrier groups have not been restocked once this month. About 33% of the 773 Brownells products we track are in stock today.
Also popular this month: Brn-180s(R) Gen 2 Complete Upper Receiver Assembly - Brn-180S Gen 2 Upper Receiver 223 Wylde 10.5" Barrel Black, 308AR BOLT CARRIER GROUPS, Recoil Spring Assembly For Compact Frame Glock Pistols and BRN AR-15 Glock Pattern 9mm Luger Bolt Assembly, Nitride.
All Brownells monthly updates →
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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.