Would go with the Cloak because of the quick change barrel and can use magazines or belt feed. It's also a piston setup that makes it more reliable.
Here is the complete parts and tuning checklist to build a perfectly reliable, suppressed Cloak MFR56 setup.
Receiver & Internal Upgrades VLTOR A5 Buffer Tube: Extends the length of the system for a smoother recoil stroke.
VLTOR A5H3 Buffer: A heavy 6.08-ounce buffer to delay extraction until gas pressures drop.
Sprinco Orange Spring: Extra-power chrome-silicon spring to control high suppressed bolt speeds.
KNS Precision Anti-Walk Pins: Keeps the trigger and hammer pins from vibrating out during sustained fire.
Feed System Components M249 SAW Box Adapter: Mounts directly into your lower receiver's magazine well.
100-Round "Nutsack" Pouches: Keeps the weapon lightweight and prevents feeding balance issues.
USGI M27 Links: Premium-grade, clean 5.56mm metallic links free of bends or rust.
High-Temperature Lubricant AeroShell 64 (MIL-G-21164D): The specific synthetic lithium-complex 5% molybdenum disulfide grease needed. It handles extreme suppressed heat and will not corrode aluminum components like graphite-based automotive greases do.
Accessories & Tuning Steps Two-Position Gas Regulator: Set the MFR56 factory gas block switch to the "Low" / Suppressed position.
Titanium Firing Pin: Ensure the Cloak factory upper is running their updated titanium pin to withstand high back pressure.
Heavy-Duty Bipod: A rugged QD bipod (like Atlas or Harris) to handle the front-heavy weight of the upper and suppressor.
Heat-Resistant Suppressor Wrap: Prevens severe barrel mirage in your optic and protects against accidental burns.