Drop-In Builds

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Drop-In Builds

Plan a build part by part, check that everything fits, and see where each part costs least. We don't sell anything.

Fit charts come from the same rules the builder uses. Prices marked Sample aren't tracked yet; always confirm the price and fit with the retailer and the maker. Parts that are the serialized firearm ship to a licensed dealer, and laws vary by state.

Some retailer links may earn us a small commission at no extra cost to you. It never changes which parts we show or how we check fit.