RustMC is a stateless model checker that enables verification of concurrent Rust programs. As both Rust and C/C++ compile to LLVM IR, RustMC builds on GenMC which provides a verification framework for LLVM IR. This enables the automatic verification of Rust code and any C/C++ dependencies. This tool paper presents the key challenges we addressed to extend GenMC. These challenges arise from Rust's unique compilation strategy and include intercepting threading operations, handling memory intrinsics and uninitialized accesses. Through case studies adapted from real-world programs, we demonstrate RustMC's effectiveness at finding concurrency bugs stemming from unsafe Rust code, FFI calls to C/C++, and incorrect use of atomic operations.