Brenneke SL122SFM SFSM 12 Gauge 2.75in 1.25oz 525Gr Slug Shotshells - 5 Rounds - The Brenneke Special Forces Short Magnum (SFSM) offers a unique projectile one of superb penetration and the ability to stop most threats at medium ranges. The SFM's massive frontal area, exceptionally hard alloys, and distinctive Brenneke weight-forward design will penetrate many vehicles, doors, and walls, putting an end to the threat. Its special red coating reduces barrel fouling and cleaning, too, giving the good guys yet another break. The SFSM utilizes a lead point with ribs that point to the right to ensure smooth choke passage and patented rear slides into the point after the impact.