Ruger 90679 AR-556 5-Round Magazine for Ruger AR-556 .450 Bushmaster - Black

The Ruger 90679 AR-556 5-round magazine for .450 Bushmaster is a purpose-built magazine designed specifically for the Ruger AR-556 platform in this hard-hitting cartridge. Built from .020 gauge 410 stainless steel and heat-treated for strength, this magazine delivers the durability hunters and shooters demand from a centerfire rifle magazine. Whether you're working up handloads or running factory ammunition, this 5-round capacity keeps you in the field longer and at the ready.

Construction matters in harsh field conditions. The magazine is chemically treated for corrosion resistance and finished with Ruger's proprietary Marlube coating—a finish that hardens into the surface rather than wearing away, while providing self-lubricating properties to keep things running smooth. The chrome silicon spring is paired with an enhanced anti-tilt black polymer follower that ensures reliable feeding and seating with each cycle, eliminating the feeding hiccups that can derail a hunt or range session.

Interior dimensions are precisely engineered at 2.316 inches OAL (with tolerances of +/- .002 inch), giving you a magazine that reliably accommodates both fresh factory rounds and reloads. If you're running a Ruger AR-556 in .450 Bushmaster and want a spare magazine you can trust in the field or at the range, this factory Ruger magazine is the straightforward choice.

Key Features

• Constructed from .020 gauge 410 stainless steel for corrosion resistance and durability
• Heat-treated for strength and reliable performance in the field
• Proprietary Marlube finish provides self-lubricating surface that won't wear off
• Chrome silicon spring and enhanced anti-tilt polymer follower for reliable feeding
• Designed for both factory ammunition and reloads
• 5-round capacity for .450 Bushmaster

Specifications

Caliber	.450 Bushmaster
Capacity	5 rounds
Material	410 Stainless Steel (.020 gauge)
Interior OAL	2.316" ± .002"
Spring	Chrome silicon
Follower	Black polymer (anti-tilt)
Finish	Marlube proprietary coating
Compatibility	Ruger AR-556
Color	Black

Frequently Asked Questions

Will this magazine work with my Ruger AR-556 in .450 Bushmaster?

Yes. This is a factory Ruger magazine designed specifically for the AR-556 platform chambered in .450 Bushmaster.

Can I use this magazine with reloads?

Yes. The interior dimensions (2.316" OAL ± .002") are engineered to reliably feed both factory ammunition and handloads.

What's the capacity?

This is a 5-round magazine.

What finish is used on this magazine?

The magazine is chemically treated for corrosion resistance and finished with Ruger's proprietary Marlube coating, which is self-lubricating and hardened into the surface to prevent wear.