Charlie's Custom Clones stocks the specialty upper receiver groups that do not fit in the standard AR-15, AR-10, or retro categories — the odd-caliber, odd-configuration, and limited-run uppers serious clone builders hunt for. If you are building something unusual, this is where you start.
The Other Upper Receiver Groups category covers everything from pistol-caliber dedicated uppers and .22 LR training uppers to specialty-caliber short-barrel builds, proprietary-pattern uppers for non-AR lowers, and one-off uppers assembled by Charlie's team from authenticated parts. We also list deployment-configured uppers for specific historical rifles that do not fit cleanly under a manufacturer heading — Mk 12 variants, Mk 18 variants, and program-specific SPR and CQBR configurations.
Every upper listed here is inspected, headspaced, and test-fired before it ships. If the rifle it is going on is a clone of a fielded weapon, we match the original configuration to the drawing package. If the build is a custom request, we document what went into it so you know exactly what you are buying.
Browse the listings below, and reach out if you do not see what you are building. Chances are we either have it in the shop or can source it. Find your upper today.