Andrew on the Vuurwapen Blog has done a familiarization video on the FN Mk 16 SCAR-L for AR-15 owners. He goes over the details of the Mk 16. He points out where the two are alike and where they are different. If the SCAR rifle intrigues, it is well worth watching. If you think the SCAR is just some fancy expensive toy, watch it anyway and you might change your mind.