Ruger SR-556 300 Blackout 30-Round Magazine

300 BLK SR-556 Magazine

This is a 30-round magazine for the Ruger SR-556 chambered in 300 AAC Blackout, a .30-caliber cartridge designed to run in the AR-15 platform. The body carries a pressed-in caliber marking, so you can tell it apart from your 5.56 magazines by sight and by touch. It suits SR-556 owners who want spare magazines for the range, for training or for a loaded go-bag.

Features

• 30-Round Capacity — Holds thirty rounds of 300 Blackout in a double-stack column, where cartridges sit staggered side by side to keep the magazine compact.
• Embossed 300 AAC Blackout Marking — "300 AAC BLACKOUT" is stamped into the body, which helps keep these rounds out of 5.56 rifles that share the same magazine well.
• High-Visibility Orange Follower — The follower is the spring-driven plate that pushes rounds up, and in bright orange it lets you see at a glance when the magazine is empty.
• Reinforcing Body Ribs — Long ribs pressed along both sides stiffen the walls and guide the cartridge stack as it feeds.
• Curved AR-Pattern Profile — The familiar curved shape follows the stack of rounds and seats in the SR-556 magazine well like a standard AR-15 magazine.
• Polymer Floorplate — A black polymer baseplate with an access hole closes off the bottom and comes off for cleaning.
• DuraMag Speed Construction — The floorplate is marked DuraMag Speed by C Products Defense, the maker that produces this magazine.
• Gray Finish — The body has an even gray finish with tan undertones that contrasts with the orange follower.

Build and Compatibility

The magazine is built for the Ruger SR-556 in 300 Blackout, and it follows the standard AR-15 magazine pattern that rifle accepts. Because 300 Blackout rounds physically fit in 5.56 magazines, the stamped caliber marking and distinct gray body help you keep the two calibers apart in a mixed kit. The polymer floorplate and orange follower are marked as DuraMag Speed components from C Products Defense.