The Gen II rifles add these features:
- bolt hold open
- one piece extruded aluminum handguard
- four position adjustable gas block
- black nitride barrels
The rifles remain compatible with standard AR magazines and are chambered in 5.56 NATO. Various gun colors are available. MSRP for the rifle is $1,089, and includes a lifetime warranty.
If you are not familiar with the MPAR 556, this video is a good overview of the rifles: