MK111 Pro Upper Features
The MK111 PRO Upper, features the PWS long stroke piston system. Internally, this line offers the tried and true system. Featuring a free-float MLOK handguard, with the fully forged upper. The MK111 Pro is a no-nonsense tool for when you need a high value option that is relentless and unstoppable.
MK111 Pro Upper Specifications
- Manufacturer: Primary Weapons Systems
- Manufacturer Part #: 19-PM111UA0B
- Model: MK111 Pro Upper
- Type: Upper
- Caliber: 223 Wylde
- Caliber: 556NATO
- Barrel Length: 11.85″
- Color: Black
- Description: MLOK
- Fit: AR-15
