The Primary Weapon Systems MK2 MOD 1-M 6.5 Creedmoor Upper Receiver features the PWS long stroke piston system originally designed for the AR-15 platform. What makes a short gun run, makes a long gun accurate- that being said, the MK2 is among the most reliable and accurate in its category. The MK2 line features a free float MLOK handguard with fully forged upper receivers. Lightening cuts and an eliminated forward assist make the MK2 MOD 1-M line a lightweight yet solid feeling firearm.

With a 18” barrel, the longest barrel available through PWS, the MK218 MOD 1-M offers shooters a long range gun with the convenience of a semi-auto platform. Coming standard with a PRC 30 compensator on the end, the MK218 MOD 1-M is the ideal upper receiver for quick follow up shots at long distances.

• 6.5 Creedmoor
• M-LOK Handguard
• 1:8 barrel twist rate
• Includes Radian Raptor Charging Handle
• 3-setting adjustable gas system

Accuracy, smooth operation and reliability make the MK2 MOD 1-M 6.5 Creedmoor Upper Receiver line a necessity for those looking to expand their long-stroke piston system firearm collections.