Answer
Nov 17, 2025 - 09:43 AM
The receiver extension tube size—mil-spec or commercial—is important because it determines whether a stock airsoft will fit snugly and securely on your firearm. Mil-spec tubes are slightly smaller in diameter than commercial tubes, so stocks are not universally interchangeable between the two types. Mil-spec is often considered the "best" for most tactical and military builds due to its standardization and widespread availability, as seen in products like the MAGPUL MOE Stock Milspec Black | M4 Stock and MAGPUL - MOE SL Carbine Milspec Stock (Black). Having both mil-spec and commercial options available provides flexibility for users with different buffer tubes, but all products listed here are mil-spec, ensuring consistency and easy upgrades for most users.
