80% Lower Build School
Email Me

80% Lower Receiver Build School

Are you aware that you can build your own AR-15? It's perfectly legal to manufacture your own gun as long as you never sell it without ATF approval. 

Many people are afraid of a project like this because they lack the proper tools and experience. We're here to fix that problem. Keep reading to see how it works.

LCT Products is a machine shop. We have all the tools needed to complete your AR build. We'll supply everything you need, including a competent instructor to handle all your questions while you work. 
We will supply you with a forged "80%" lower receiver. This is simply an aluminum lower with 80% of the work already completed. The hard stuff is already done for you. 
We will supply you with the fixtures needed to insure you machine exactly where you are supposed to. 
We will supply you with the cutters and drill bits needed too. This alone can save you a considerable amount of money. 

You will set up an appointment to work on your project. At the chosen time, you'll come to our location in Lawson, MO (Just north of Kansas City). We'll supply you with safety glasses and an instructor will introduce you to a Bridgeport milling machine where you will machine your lower. It's really that easy. When you are finished, you have a completed firearm according to the ATF. 

1st AR-15 $225.00
Subsequent AR-15's (same day) $165.00
1st AR-10 $375.00 
Subsequent AR-10's (same day) $315.00 

Add $10.00 each for anodized
Add $30.00 each for after hours appointments. 
All prices are plus Missouri sales tax.

Normal business hours: 7:00 am to 4:00 pm Monday to Thursday

How long will it take for me to machine my AR lower receiver.

That really depends on you. If you're new to machining, it will probably take around an hour.

Back to Top

Do you have CNC machines available?

Yes, we do have CNC machines. However, the ATF has determined that they cannot be used to complete an 80% lower unless you do the set up and programing too. We will not be allowing customers to do that.

Back to Top

Can I leave my lower with you to be assembled at a later date.

No. Once you have started machining the lower, it is no longer considered an 80% receiver. It is now considered a fire arm. It must at that point stay in your possession.

Back to Top

Can I bring my children?

No. This is a working machine shop. No one under the age of 18 is allowed.

Back to Top

Can I bring my friends?

I'm sorry, but there simply isn't room for spectators, and we need you to concentrate on what you're doing. However, we do have enough equipment for two people to work on lowers at the same time. Your friend can schedule a build at the same time as you.

Back to Top

What are the legal requirements to build my own lower?

You must be old enough to own a rifle (18) if you are building a lower for a rifle. You must be old enough to own a pistol (21) to build a lower for a pistol. You must be legally allowed to own a fire arm in Missouri. Which of course means you cannot be a felon.

Back to Top

How do you know you aren't allowing criminals to build weapons?

We require each builder to have a valid CCW from any state. Or, be a current LEO, or be willing to submit to a criminal background check at your cost.

Back to Top

What should I wear?

You may not where shorts or open shoes. The chips coming from the machine will be hot and sharp, so keep your skin covered. You should also leave your jewlery at home and tie up any long beards or hair.

Back to Top

What if I mess it up?

It's really not as hard as you think. If you pay attention to what you're doing, you shouldn't make a mistake that will cause your lower to not function. However, if you do mess up your lower, we can sell you another one at a reduced rate. The damaged lower must go home with you (it's still a gun) or be destroyed. If the mistake is fixable, we can help you figure out what to do, but we CANNOT help you fix it.

Back to Top

Can you add my favorite logo to the lower?

NO. Logos are trademarked by the manufacturer. When you finish the lower, you, by law, are the manufacturer. It is illegal to steal another manufacturer's logo. You can however add original pictures or text to your gun.

Back to Top

What parts are included?

We only supply the 80% lower, and the tooling required to finish it. All other parts to finish your gun (including lower build kits) must be supplied by you. We do keep a few parts around for your convenience, and can order special items if you let us know what you want in advance.

Back to Top

Can I bring my own lower?

Yes. You can bring a lower from any manufacturer that you like. However, it is possible that some lowers will not fit our fixtures properly. If your's doesn't fit, you won't be able to complete the project.

Back to Top