The Parts Steamboat Actually Runs
Finish Your Build
You grabbed the lower — here's everything else it takes to finish the job. Best-selling barrels, triggers, uppers, stocks, BCGs and optics, in stock and ready to ship. Parts aren't the regulated firearm, so there are no new hoops.
The brands you build with
Magazines — Colorado Legal
Shop all mags →
Magpul
PMAG GEN M3 · 5.56 · 10rd
Lancer
L5AWM · .223/5.56 · 15rd
Magpul
PMAG GEN M3 · 7.62/.308 · 10rd
All magazines shown hold 15 rounds or fewer — legal to ship to any Colorado address. Higher-capacity magazines are in-store only.
Triggers
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Bolt Carriers & Charging Handles
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Uppers
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Stocks, Braces & Buffers
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Muzzle Devices
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Red Dots & Optics
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Lower Parts Kits & Small Parts
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Pistol Upgrades
Shop all pistol barrels →
Building a 6mm ARC?
One of our fastest-moving calibers — and we stock both ends of it. Grab a match-grade PROOF Research carbon-fiber barrel and feed it Hornady 108gr ELD Match, in stock now.
The Reloading Bench Is Stocked
Primers, powder, bullets, dies and presses — one of the busiest corners of the shop. Restock before the next range day.
Build It Right.
The parts Steamboat actually runs — in stock, priced fair, backed by a gunsmith who can help you put it all together. Order online or come see us.