AR Pistol Builder
Over 1 million parts configured since 2020
Build an AR pistol part by part and price it in real time. Start with a short barrel upper, 8 to 11.5 inches, then add a pistol brace or pistol buffer tube, the handguard, trigger and optic. It is the same AR-15 lower and 5.56 or 300 Blackout parts, so GunPartPicker checks fit the same way and compares live prices across 35+ retailers.
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-10 Builder
.308, 7.62 NATO or 6.5 Creedmoor on a large frame lower. The builder flags small frame parts that will not 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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