Follow up on the steel MBUS Pro Flip sights Magpul has now introduced a 40-Rd PMAG with the Gen M4 Designation. The magazine comes in at just 2 pounds and is machined from SV30 steel hardened to a Rockwell rating of 52 with a galvanized finish. This will be a great addition for competitive shooting as they more easily drop free from the rifle with the added weight. We can't wait to get are hands on these. MSRP comes in at just under $70.