Sig Sauer recently announced on their Facebook page that they’ve started to ship their new SIG516 and SIGM400 Carbon Fiber rifles to their dealers. Both the SIG516 and SIGM400 rifles use free-floated carbon fiber handguards and come with a carbon fiber A2-length fixed buttstock. Both rifles also come with a 2-stage match trigger and 30 round Lancer L5 magazine. The SIGM400 is a direct gas impingement AR while the SIG516 makes use of a short-stroke gas piston system with a with 4-position gas valve. The SIG516 rifle (pictured above) weights in at 7.1 lbs without a mag and retails at $2,504. The SIGM400 rifle (pictured below) also weights in at 7.1 lbs without a mag and retails at $2,132.