AR-15 Builder

Over 1 million parts configured since 2020

Build an AR-15 part by part and price it in real time. Pick a lower receiver, upper, barrel, handguard, bolt carrier group, trigger and optic — GunPartPicker checks compatibility as you go 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

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