AR-10 Builder

Over 1 million parts configured since 2020

Build an AR-10 part by part and price it in real time. Start with a large frame lower and pick a .308 Win, 7.62 NATO or 6.5 Creedmoor upper, barrel and bolt carrier group, then the handguard, trigger and optic. GunPartPicker flags small frame AR-15 parts that will not fit and compares live prices across 10+ retailers so you can see what the full build costs before you buy.

Not sure where to start? The AR Build Cost Calculator fills every slot with the part builders add most, in stock, and prices the whole build.

Choose a part to start your build

Build an AR-15, AR-10 or AR-9

AR-15 Builder

Build a 5.56 NATO, .223 Wylde, 300 Blackout or 6mm ARC AR-15 on a standard small frame lower, with compatibility checked on every slot.

AR-9 Builder

Build a 9mm AR-9 pistol or carbine. Pick a 9mm lower and the builder flags 5.56 barrels and bolts that do not match it, then prices the blowback bolt, barrel and upper across every store we track.

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