RCM HK21 Barrel

RCM HK21 Barrels are made from Mil-Spec 41V50 CHF blanks that are fully Salt Bath Nitrided for optimal wear and corrosion resistance. These barrels are the finest out there to complete your HK21/FMP or HK11 build. These are stripped so you will need to add your own hardware.

Compatible With:

• HK21, 21E, and FMP HK21’s
• HK11 & 11A1

Specifications:

• Material: 41V50 CHF
• Twist rate: 1:10
• Length: 17.70″
• Salt Bath Nitride inside/out