Your full service gun shop with plenty of attitude and hometown values.

Come stop by the shop, our Store Hours are Thursday's from 6pm to 9pm and Sunday's from 4pm to 8pm.

Who can Design and Assemble a Custom Firearm to Meet My Wants and Needs?

Black Diamond Armory is a fully Federal Firearms Licensed, Full Service Firearm Dealer that specializes in custom AR-15’s.

The look is as important as the function for today's shooter. Black Diamond Armory will lend a hand from the design process all the way to final assembly to create the one of a kind AR that stands out at the range. The days of cookie cutter AR15 rifles are behind us, now is the time to enjoy the performance and add 'The Look' to a tried and true rifle.


Check out our Firearms & Accessories

Our inventory is constantly changing and we are always striving towards having everything you need in our inventory or at least a click away. Check back often as new handguns, rifles, trade-ins, upper assemblies, lower assemblies, scopes, red dots, mounts, self defense items, storage, maintenance supplies, parts and ammo are always arriving.

Want to transfer gun ownership in a private sale? We do gun transfers for only $25. Call, email, or stop on by the shop to get started.

Reviews and Testimonials

Visit our Facebook Page for more! Click Here!


Stewie Neighbor

"I bought the gun oil from you today and tried it on several firearms and I love it so far! It applies like a dream and feels and looks awesome! I am totally sold, and I have used many oils over the years! To say this is the best so far is an understatement.  When I have some extra cash, I will buy a dozen or so and give them to all my friends. Thanks for totally rocking this!"


Don't forget, we now stock and sell a wide variety of ammo!

BDA Trump

Show your support this 2020 election season!

$20 FREE shipping to the lower 48 states.

BDA Hoodie
Black & Pink

Represent your favorite Gun Dealer and stay warm at the same time!

Get the classic White print look.

BDA Hoodie
Black & Orange

Represent your favorite Gun Dealer and stay warm at the same time!

Get that hunter Orange look.

BDA Hoodie
Black & Pink

Represent your favorite Gun Dealer and stay warm at the same time!

Get the badass Pink look.

Permit to Carry Classes

Now available online! 

Purchase on the Store!

Black Diamond Armory offers a state certified comprehensive Minnesota permit to carry class multiple times a year.

We are under attack.  Express your 2nd amendment right and sign up for a class now.  Stand up and be counted!

See the CLASSES page for more details.

Gallery of Dreams

This page is dedicated to some of Black Diamond Armory’s badass firearms.  The road to badassery starts with an idea (and a job that leads to a paycheck).  With these humble beginnings and a bit of help from Black Diamond Armory, your custom build could find its way to these hallowed pages.

Gun Show Roadmap

The Black Diamond Armory team frequently sets up shop at gun shows across Minnesota. 
Come visit, hang out, and check out all the latest gear we have to offer.

Exciting news coming soon!


Get in touch with us for anything. general questions, feedback, custom build options, stock inquiry. We want to hear it all.

Call or email to start working on your dream AR-15 today.

Phone: (507) 218-6884

311 4th Street NE

Stewartville, MN 55976

(507) 218-6884

Store Hours:

Thursday: 6pm - 9pm

Sunday: 4pm - 8pm

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