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 35+ 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
5.56 NATO, .223 Wylde, 300 Blackout or 6mm ARC on a standard small frame lower. Every slot is checked for fit.
AR-9 Builder
9mm pistol or carbine. The builder flags 5.56 barrels and bolts that will not run, and prices the blowback parts across every store we track.
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