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Let’s face it—building out a reliable rifle can get expensive fast. But just because you're watching your budget doesn’t mean you need to compromise on performance. Enter the MK111 PRO Upper—a purpose-built upper that delivers PWS's legendary long-stroke reliability, modern suppressor tuning, and top-tier features, all without blowing out your wallet. This isn't just another entry-level upper. It's a value-packed performer, built with the same mindset that’s kept PW …