Pinned, Protected, and Ready to Run

This MunitionWorks upper comes equipped with a factory pre-pinned and welded A.P.E. (Armored Pinnable Extension), permanently attached to the barrel for instant length compliance and rock-solid durability. The A.P.E. acts as both a universal 1.375x24 hub and a reinforced protective shield, giving your suppressor or muzzle-mounted device a secure, heat shielding, impact-resistant housing.

Pinned directly through the muzzle threads, it locks the system into place with zero wiggle, zero guesswork, and no need for a gunsmith. The integrated shielding design keeps blast, heat, and harsh contact away from your suppressor body—extending service life while keeping everything aligned and protected.

This pre-pinned configuration is fully compatible with most major suppressor brands and muzzle device interfaces, making it an ideal turn-key upper for states or configurations requiring fixed overall barrel length. It’s rugged, compliant, and ready to run the moment it hits your hands.