Primary Weapons Systems MK109 MOD 1-M, Upper Receiver, Fits AR-15, 300 Blackout, 9.75" Barrel, 1:8" Twist, PWS Triad Muzzle Device, 8.9" PWS PicLok MLOK Handguard, Anodized Finish, Black, Includes Radian Raptor Ambidextrous Charging Handle MK1-M1U-300BLK-9 MK1M1U300BLK9

The MK109 MOD 1-M Upper operates on the highly acclaimed PWS Long Stroke Piston System renowned for its reliability and reduced fouling. The inclusion of a 3-setting Adjustable Gas System allows users to fine-tune gas flow ensuring optimal performance in diverse shooting conditions as well as optimizing it for suppressor use. This innovative system not only enhances reliability but also provides adaptability to various ammunition types and environmental factors. - Highlighted Features - Sub-MOA Accuracy Guarantee: Experience Sub-MOA accuracy with high-grade ammo thanks to our Boise made precision barrels. - PWS Long Stroke Piston System: Renowned for reliability and reduced fouling with adjustable gas settings for optimal performance. - Suppressor Optimized: Provides enhanced suppressor performance by minimizing back pressure reducing gas blowback and optimizing gas flow for a cleaner and more comfortable shooting experience. - 300 BLK Chambering: Meticulously designed for outstanding accuracy and reliability for both super and subsonic 300 BLK ammunition. - PWS Triad 30 Muzzle Device: Expertly mitigates recoil and muzzle rise for improved shooter control. - Innovative PicLok Handguard: Combining both Picatinny and MLOK into one for mounting accessories balancing ergonomics and functionality. - The PWS VOW: Our warranty for all PWS products guaranteeing repair or replacement for any defects or issues ensuring your complete satisfaction. Manufacturer Part Number: MK1M1U300BLK9