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Custom Upper Receivers
Select parts to build your customized complete upper receiver!
CUSTOMER REVIEWS
4.9 29 reviews
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Aaron W ★★★★★
I have never in my life had better service from a company, let alone a firearm transaction. I bought several rainbow PVD items which vary greatly in color and asked to swap one out. … More Not only did they agree, but they sent me several pictures of everything they had and let me select the one I liked. Then they sent a text to make sure that I liked it when I got it in person. Who does something like that these days? I will absolutely buy from them again and give the highest recommendation. Besides the great service, their products are top notch and so much better than other places I've bought from online. A++++ -
Bill S ★★★★★
Everything about the transaction was smooth. Great communication, They left daily emails to me tracking my order. Prices are fantastic. Product was above my expectations. I will … More do business with them permanently. Keep up the great work 👍 -
Stacy G ★★★★★
Great guys who were lots of help! Super fast, friendly service! I’d highly recommend them and am definitely buying from them again soon! -
Mitch L ★★★★★
Just had my 7" pistol upper which was a blem. I can not see any blems. This was a great deal!!! -
David A ★★★★★
Let me first start out by saying that Mid State Firearms has the best customer service that I have ever seen or delt with. I ordered a 16" 223 Wylde upper last April. I had … More a accuracy issues and reached out to them last week. Granted it's been almost a yr since I purchased this upper. I sent them an email asking what type of ammo do they recommend for the best shot group. They responded the next day and asked what kinda of group was I getting. After I explained my issue he/she emailed me there address and told me to send it back with a note and they would exchange it for a brand new one in either the 1/8 or 1/7 twist whichever I preferred. I received my 1/7 twist today. It's brand new looks amazing and shot almost hole for hole at 100. This company is proud of there work and definitely stands by there product 100% and it's American made! Customer service has sold me as a customer for life! I look forward to doing business with mid State Firearms in the near future! If I could give them 100 stars I would. Don't hesitate to purchase there products for your next build. Trust me you won't be disappointed! Thanks Mid State Firearms it's been my pleasure doing business with you!!! I cannot express enough how awesome there customer service is. After posting this review I some how mixed a 300 blackout shell in with my 223 magazine. I'm very thankful to be able to type this review. After shooting that 300 blackout through the 223 wydle barrel. The lead never left the barrel and lodged about 3 inches from the end of it. Thank God they didn't take any short cuts. The upper stayed together with bolt locked into battery. Blew the clip out and bent the dust cover. Of course it ruined my upper but with a phone call to mid state Arms I able to send it back and had the barrel swapped out, dust cover and they included a new bolt for $225. The new one shoots 1/4 groups at 100 yards. Thanks again Mid State Arms for your support and making a solid upper and I'm thankful to walk away unharmed after this incident. Double check your ammo! -
Adam N ★★★★★
This place rocks. Ordered from them and received my package in 3 days. The product is high quality and is a very good value. I did have a small issue with my order but they sent me … More a replacement without hesitation and paid for postage to return the other product. Will purchase from them again. -
Ben O ★★★★★
I purchased a 10.5 inch 300 AAC BlackOut upper from them. The shipping was fast and the product was what I expected. I got the upper and the same day as it arrived(straight from the … More box with no lubing or cleaning) I shot 300 rounds of various different types of grains and manufacturer’s. It never jammed or failed to fire once. It even knocked bigger holes out of my AR500 target than a 308. Their products are great and I would recommend them to anyone looking for good quality parts, uppers, or firearms. -
Drew T ★★★★★
Tried to post a review on their site but had trouble for some reason. Bought an upper around the holidays and had a couple questions before I ordered. Emailed them, remember it was … More the holidays, and became inpatient waiting for a response. Text one of the owners and he arranged to call me that evening. He answered my questions, I placed my order the next day. Great product and a great company that cares about it's customers! -
Ethan C ★★★★★
I ordered an upper receiver from MidState. Unfortunately, during the ordering process I put the wrong zip code in and my card was declined. My bank statement showed that I'd been … More charged three time, though to my knowledge only one order had been successful. I emailed them and asked and they assured me I'd only be charged for the one order, and even went so far as to send me a screen shot of the successful order. This all happened on a Saturday too! Their customer service is top notch, and I will absolutely buy from them again. -
Campbell W ★★★☆☆
So I'll start by saying customer service and shipping was great. It shipped fast and I got most of my emails replied to. Now for the upper itself... I ordered an upper with an … More 18 in stainless fluted barrel chambered in .223 wylde. Upon taking it to my local gunsmith, there were some things wrong with the upper. I am a bit of a perfectionist with OCD so maybe it's just me... the biggest thing for me was the gas block noticeably canted, my five year old could tell. I paid extra money for a "competition" muzzle brake, that had no flat sides for a wrench.. I wouldn't even care about that IF the crush washer had been installed properly. So I paid for this upper and basically had to have it put together properly. I'm not trying to be hateful, but these things should have been done correctly the first time. -
Billy M ★★★★★
Bought the 223 Wylde rifle kit for my Anderson lower. Fires flawlessly, love it. Got it quick, great customer service. Hope my 300 BLK upper grab bag I ordered is anywhere near as nice. … More Thanks y'all saving up for the 450 Bushmaster upper😁 -
Tommy W ★★★★★
I have ordered (3) Uppers from these guys and have been impressed with each. Received them within just a few days and they were well priced and have worked flawlessly. I am planning … More another build soon and will be purchasing another upper from them. Keep up the great work!T. Weeks, Sardis, MS. -
Richard C ★★★★★
Second upper reciever that I have bought from Mid State Firearms. I recieved it in 3 days after I ordered it. Very professional. -
9 ★★★★★
I ordered an upper receiver an changed my mind on it right before it was going to be test fired and shipped off. They swapped the barrel and handguard to the ones I preferred and still … More had it delivered in a few days. They included a sticker and a coozy, great buying experience every time 👌 -
Chris B ★★★★★
I met these guys at a local gun show after several text communications using the phone number they openly post on their website. They are great guys and very easy to do business with! … More They had an awesome booth building uppers and lowers to order and they had any kind of barrel, handguard, muzzle device, etc. you could possibly want. I picked up a nice .223 wylde complete upper with BCG and I'm going to get a .300 blackout pistol upper the next time I see them!! -
Matt O ★★★★★
Great buying experience! Will definitely do business with you again. I ordered a barrel and it was at my door much sooner than expected, and even came with a free drink coozie! -
Andrew V ★★★★★
I purchased a Titanium Nitride BCG from MidStateFirearms and I'm very happy with it! They got it shipped to me quickly and the price was too good to pass up. Will be purchasing … More from them again. -
Matt H ★★★★★
Fantastic deals on good quality products. Even the packaging my upper receiver came in was done with care. I will definitely be a returning customer. -
Aardwolf S ★★★★★
We use Mid State Firearms to supply us with OEM parts for our manufacturing builds. We appreciate their prompt communication, fair prices, and fast shipping. -
David S ★★★★★
This turn out perfect I bought a upper receiver and I love it I order it and it was a custom upper and Had it in less than week awesome It looks awesome so impressed -
Chris M ★★★★★
Love all my uppers I have four, one on the way great guys to do do business with -
Tyler S ★★★★★
Orders a upper from them and I am extremely happy with it thank you so much!!! -
For S ★★★★★
Great Product _ Great Service _ Great PeoplePut a lot of effort in to make customers happy ! -
Jorge P ★★★★★
Great service. Almost instant email replies. Good quality parts. -
Jack F ★★★★★
Soild staff. Solid company. Solid products. Shop with confidence. -
Crowbar J ★★★★★
Excellent service and product. Will do business with them again. -
Will K ★★★★★
Best prices on AR parts! -
Louis E ★★★★★
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Gip B ★★★★★
WELCOME TO MID STATE FIREARMS
Mid State Firearms specializes in offering top-quality Ar15 parts, Upper Receivers, and accessories for sale. We also work to provide you with the best prices on anything you need for home or self-defense. Whether you need a fun range toy or a defense weapon to protect your family, we are here to help. Be sure to browse all of our items and options to customize your upper for your needs.
There’s nothing like a custom-built AR15. AR15 customization doesn’t have to be tedious or expensive, so please check out our wide collection of AR 15 custom parts and browse at your leisure.
AR15 Custom Builds: Create Your Dream Rifle with Mid State Firearms
When building a custom AR 15 with a proper AR 15 build kit, you can do wonders for your rifle, prolong its durability, improve the ergonomics and contours, and make it your own.
The AR-15 rifle is a prolific American firearm. With so many widely available aftermarket options, it’s one of the most customizable firearms on the market today. Its popularity is owed to the fact that it can be customized with the AR 15 build kits of your choice.
Why Choose Mid State Firearms for Your Custom AR-15 Build?
Mid State Firearms offers you unique customization options for the ultimate AR15 custom build. Customized AR-15 rifles are our main expertise.
We have a wide variety of:
- AR-15 accessories;
- AR build kits;
- AR15 lower receiver parts;
- AR uppers;
- As well as a collection of lights and optics for you to choose from.
Unique Customization Options
With so many customization options, we guarantee you’ll find the most suitable parts for your AR-15 rifle and completely improve your platform with the latest custom AR 15 accessories.
Wide Range of High-Quality Parts and Accessories
We offer a diverse range of products, such as build kits, lower receivers & parts, upper receivers & parts, Glock-compatible products, and more.
Best Prices on AR 15 Custom Parts
Since we started the business, our main focus is still the AR15 platform and the many AR 15 custom parts you can find. From complete upper receivers to lights and optics, there are many options for you to choose from.
8+ Years in Business
We’ve been in the customized AR 15 business since 2013. With thousands of satisfied customers, we guarantee unrivaled quality when it comes to customizing AR 15 rifles for all of your shooting needs.
Live Inventory – If it’s in-stock, it’s ready to ship
Yes, you heard that right. If you see any of your unique custom AR-15 accessories available here, it’s ready to ship!
100% Secure Checkout
Our main priority at Mid State Firearms is to provide you with the best custom AR-15 parts, as well as the most important AR-15 knowledge so you can build the best version of your rifle. If you have any questions about custom AR-15 parts or any other inquiries, check out our FAQs section here.
24/7 Support Available via Call and Text
We’re based in Mississippi, and our customer support is available 24/7. Contact us via email, telephone, or text, or you can come by and have a chat about your dream AR build kit! Feel free to drop a line.
As you can see, the AR-15 is a flexible platform with which you can combine your chosen custom AR 15 parts and turn it into your own personal piece, whether it’s shooting at the ranges, home defense, or hunting! If you want a proper custom built AR 15, don’t hesitate to visit Mid State Firearms.