DuraMag SS 223 Remington 5.56x45mm 300 Blackout 20-Round Stainless Steel Magazine

The DuraMag SS is a 20-round stainless steel replacement magazine for AR-15 rifles, designed for use with 5.56x45mm NATO, .223 Remington and 300 Blackout ammunition. It is built from 410 stainless steel and finished in T-360 coating in black, a combination intended to improve durability and ease of loading in harsh conditions.

According to the product information, the magazine's stainless steel construction means it will not flex or swell like polymer, and it is suitable for extended storage while loaded. The listed interior and exterior geometry is described as supporting feeding reliability, and the T-360 finish is described as providing smooth cycling. The magazine is noted as suited to 300 Blackout loads with long overall length or heavy subsonic bullets.

• Type: Rifle magazine
• Platform: AR-15
• Calibers: 223 Remington, 5.56x45mm NATO, 300 Blackout
• Capacity: 20 rounds
• Material: 410 stainless steel
• Finish: T-360, black
• Model: SS Replacement Magazine