How much does it cost to assemble an AR-15?

You can cut down on some costs by completing a lower, then purchasing a complete upper receiver assembly. With this, no paperwork is required. When it is all said and done, you could be looking at $500 – $900 dollars.

Can I mix and match AR-15 parts?

Short answer technically yes if they are built to spec. Some lowers and uppers fit together perfectly, some are very hard and/or tight going together, and some won’t mate. I have an Olympic Arms AR and the upper will mate to my Aero Precision lower but its very tight and the take-down pins are hard to push in.

Can I put any upper on any lower?

No, combining upper and lower receivers of different brands will make no difference in accuracy whatsoever. On the other hand, the quality of your upper receiver certainly will.

Can you buy a complete lower receiver?

Federal law requires that you be 21 years or age or older to purchase a stripped receiver or frame. If a frame or receiver can only be made into a long gun (rifle or shotgun), it is still a frame or receiver not a handgun or long gun.

How to build an AR 15 lower?

Magazine Catch Assembly. You can start your AR-15 lower receiver build many different ways but I like knocking out some…

Trigger Guard Assembly. Some lowers have this part as part of the stripped lower…but most likely you’ll have to do it…

Bolt Catch Assembly. Find these parts! The bolt catch spring is even…

How to build an AR-15?

Install Forward Assembly onto the Upper Receiver. Have the upper receiver upside down so the Picatinny rail is against your mat.

Install the ejection port cover assembly on the upper receiver.

Assemble the bolt carrier assembly. Push the bolt all the way into the bolt carrier,ensuring that the hole in the middle of the bolt is aligned with

Assemble the charging handle assembly. Insert the spring into the charging handle.

Installing the barrel. Make sure the bolt carrier assembly and charging handle assembly haven’t been attached to the upper receiver yet.

Install the outer receiver nut and inner barrel retainer but on the barrel threads

What are the parts of an AR – 15?

Upper Receiver Group Parts. Your rifle’s upper receiver group is the part that consists of the upper receiver, barrel, forend, bolt carrier group and charging handle, as well as other AR-15 upper receiver components. This device attaches to your rifle’s lower receiver to form your fully-functional weapon.