CMMG 5.7x28mm FN PS90 Barrel - Great choice for your PS90 SBR project. Pair this with a CMMG PS90 Flash hider or thread adapter to complete your SBR. - At Sportsman's Warehouse, we live for the thrill of the great outdoors. Whether you're hunting, fishing, camping, backpacking, or shooting, having the right gear is key to making every moment unforgettable. That's why we bring you only the highest quality, trusted brands-because your outdoor experiences deserve the best. From expert advice to quality gear and community events, Sportsman's Warehouse is more than a store-we're your partner on every journey. Come explore with us and experience the difference passion makes.