It aptly answers what must be the most frequently asked questions about L119A1 front sights. Because anything posted on Facebook is ephemeral, I wanted to record the difference between front sights here.
The L119A1 SFW (16″ barrel) features a reinforced front sight.
The L119A1 CQBR (10″ barrel) features a standard front sight, with the bayonet lug removed. This is to facilitate use of the ubiquitous SureFire can.