JustinJ
Member
Is the 6720 much different than the 6920?
The key difference is the pencil barrel. Government profile barrels do nothing on a civilian's gun but put extra weight where it does no good but the most bad. The 6720 also comes with a Matech BUIS instead of a detachable carry handle. Mine also included a pair of 20 round Pmags but i don't recall what comes with the 6920. The biggest downside to the 6720 is a .625 diamater at the gas port so there are fewer options of gas blocks if one wishes to change as i did.