Shop › PWS MK116 MOD 1-M UPPER 16.1" BLK PWS MK116 MOD 1-M UPPER 16.1" BLK $1,049.95 Primary Weapons Systems MK116 MOD 1-M, Upper Receiver, Fits AR-15, 223 Wylde, 16.1" Barrel, 1:8" Twist, FSC 556 Muzzle Device, 15.05" PWS MLOK Handguard, Anodized Finish, Black, Includes Radian Raptor Ambidextrous Charging Handle MK1-M1U-223-16 Quantity: Add To Cart Added! Primary Weapons Systems MK116 MOD 1-M, Upper Receiver, Fits AR-15, 223 Wylde, 16.1" Barrel, 1:8" Twist, FSC 556 Muzzle Device, 15.05" PWS MLOK Handguard, Anodized Finish, Black, Includes Radian Raptor Ambidextrous Charging Handle MK1-M1U-223-16