The Cheapest Complete AR-15 You Can Build Right Now

Most "budget build" guides quote prices that were true once. These are pulled from live in-stock offers across the retailers we track and rewritten every morning, so what you see is what the market is doing today rather than what it was doing whenever this was written.

The current floor, slot by slot

Those are the cheapest genuinely in-stock offers in each core slot, with the typical price shown alongside so you can see how far below normal the floor sits.

A note on method: we use the tenth percentile of in-stock offers rather than the absolute minimum. The catalog contains mispriced and mislabelled listings, and the true minimum is usually one of those rather than a real deal.

Where you should not economise

Two slots punish cheapness, and both were covered in our build order analysis.

The barrel. It determines accuracy, it determines how long the rifle stays accurate, and replacing it later means disassembly and re-zeroing. A cheap barrel is the most expensive part on this list over the life of the rifle.

The bolt carrier group. This is the part under the most stress, and the failure mode is the rifle stopping. Proper materials and a correctly staked gas key matter more than finish or branding. See our BCG guide.

Spend the savings from everywhere else on these two.

Where cheap is genuinely fine

Pistol grip. A cheap grip is a fine grip. It is a shaped piece of polymer and the expensive ones mostly buy texture and angle preference.

Charging handle. The standard one works. An upgraded handle is a convenience, particularly under an optic, not a necessity.

Trigger guard, dust cover, takedown pins. Small controls with small effects. Buy them cheap and upgrade whenever you feel like it, because swapping them later disrupts nothing.

Stock. Within reason. A basic collapsible stock does the job; what you are paying more for is cheek weld, adjustment and quality of lockup.

The parts this list does not include

Be aware the slot figures cover the rifle itself. A functioning, usable rifle also needs:

• Magazines. Cheap and essential, and the most common cause of malfunctions. Buy good ones.
• An optic or sights. A rifle you cannot aim is not finished.
• A sling. The cheapest meaningful upgrade there is.
• Ammunition. Which over the life of the rifle will cost several times the rifle.

That last point deserves weight. If economising on the build means you can afford significantly more ammunition, that is the right trade almost every time. Practice improves your shooting far more than parts do.

Complete versus stripped

Building from complete assemblies is usually the better call at the budget end, and not just for simplicity.

A complete lower removes about a dozen small purchases and the fiddliest assembly step in the process. A complete upper removes barrel installation and headspacing. By the time you have bought the tools to do both properly, the saving from stripped parts has generally evaporated.

Build from stripped receivers when you want a combination you cannot buy assembled, or because you want the experience. Not to save money at this end of the market.

Buying at the bottom takes patience

The single biggest lever on a budget build is not which parts you pick, it is when you buy them.

Slot prices move independently. Barrels and complete uppers swing considerably with stock levels, while grips and small controls barely move at all. That means the right strategy is to buy the stable, cheap parts whenever you like, and wait on the two or three expensive slots until they dip.

Because these figures refresh daily, the practical use of this page is to check it before you commit to the expensive slots rather than reading it once. A barrel bought during a dip can cost meaningfully less than the same barrel three weeks later, and it is the same barrel.

What we would actually build at the bottom of the market

A complete lower from a reputable maker. A complete upper with a barrel and bolt carrier group you are not embarrassed by. Basic sights or an entry red dot. A sling. Good magazines.

That rifle will do everything a far more expensive one does for the first several thousand rounds, and it leaves budget for the ammunition that will actually make you better. Our first AR buyer's guide covers the decisions before this point.

Upgrade the trigger and the furniture later, once you have shot it enough to know what bothers you. That is a much better way to spend money than guessing up front.