The Primary Weapons Systems MK114 MOD 2-M Upper operates on the renowned PWS Long Stroke Piston System, delivering reliability and reduced fouling, while a 3-setting Adjustable Gas System lets you fine-tune gas flow for optimal performance across diverse conditions and suppressor use, providing adaptability to various ammo types and environments. This upper guarantees Sub-MOA accuracy with high-grade Boise-made precision barrels, and its suppressor-optimized design minimizes back pressure for cleaner gas flow and a more comfortable shooting experience. Chambered in .223 Wylde, it is meticulously engineered for outstanding accuracy and reliability with both .223 Remington and 5.56mm NATO ammunition, and the muzzle is threaded 1/2-28 to accommodate compensators, muzzle brakes, and suppressor mounts (sold separately on this upper). The innovative PicLok Handguard blends Picatinny and MLOK for versatile accessory mounting, while the Radian Raptor Ambidextrous Charging Handle ensures smooth operation for both left- and right-handed shooters. Backed by the PWS VOW warranty, this upper delivers reliable performance and peace of mind for serious shooters seeking precision and adaptability in a rugged, ready-to-use platform.