Every shop, one board
EVERY GUN SHOP
YOU LOVE
IN ONE PLACE
Cold Bore Index pulls the shops you already trust — Palmetto State Armory, Brownells, Primary Arms & MidwayUSA — into one board. Pick the optic, slide, BCG, or a whole build, and we send you straight to the product page to check the live price and buy from the source. We just point.
No Inventory. No Warehouse. Just Receipts.
Cold Bore Index is a price tracker, not a store. Here's the whole business, in three moves.
We Watch The Prices
Every morning we sweep the retailers builders actually use — checking slides, BCGs, triggers, furniture, and mags for blems, closeouts, and quiet markdowns.
You Hit "GO"
Every part on the board links straight to the retailer's own product page. No middleman checkout, no repackaged listings, no markup.
They Ship It
The retailer takes your payment, handles compliance, and ships your order like any other. Your warranty and support come from them — the people who actually made or stocked the part.
FULL DISCLOSURE: Some links on this site are affiliate links. If you buy through them, the retailer pays us a small commission. It never changes your price — it's how the lights stay on up here.
Build Sheets — Every Part, One List.
Pick a platform. We lay out every part you need to build it, with ballpark prices and a running total. Check parts off as you buy — your progress saves on this device.
NOTE: Prices are ballparks to size your budget, not live quotes. The one part that may require an FFL transfer is flagged on every sheet.
Field Notes
Build guides and buyer's notes — the stuff we wish someone had told us before the first order.
The $400 AR Build That Actually Runs
A full parts list from budget-tier options — what to save on, what to never cheap out on, and the one shortcut that keeps a first build from failing.
Read the guide → Buyer's NotesWhat "Blem" Really Means
Cosmetic scars, full function — usually. How to read a blem listing, what's actually wrong, and when it's free money.
Read the guide → Field NotesCold-Weather Lube: What Survives −20°F
Most gun oil is rated for a garage in Georgia. What actually works at twenty below — specific picks, and the mistake that freezes your firing pin.
Read the guide →Talk The Talk
New to building? Here's the shorthand you'll see on every listing — decoded.
Drops Don't Wait For You To Check The Site.
One short email when a tracked part actually drops. No spam, no daily digest padding — if nothing moved, you hear nothing.