The Magtech First Defense 5.56x45mm NATO 55gr FMJ (brand part no. 556A) is manufactured with the same top-quality components Magtech Ammunition builds into its dedicated Sniper and Tactical line, meeting the stringent requirements military and law enforcement buyers demand. The full metal jacket bullet feeds reliably through AR-platform rifles, delivering consistent, dependable performance whether it’s used for training, tactical carbine courses, or high-volume range work. In rifle ammunition for tactical and range training, this is Magtech’s First Defense loading.

Key Specifications

• The chambering is 5.56x45mm NATO, compatible with 5.56 and .223 Remington chambers.
• The bullet is a 55-grain full metal jacket, a reliable-feeding profile for tactical and range use.
• This ammunition is built to military and law enforcement specifications, meeting stringent reliability requirements.
• The case is brass, standard for reliable extraction and reloading.
• This is Magtech’s First Defense line, built for absolute precision and reliability.
• This ammunition is suited to training, tactical carbine courses, and high-volume range work alike.
• Each box holds 50 rounds, sized for an extended training session.
• Cases ship 20 boxes to a case, a practical bulk option for regular shooters.
• Cost works out to about $0.52 per round, reasonable for military-spec 5.56 ammunition.

Frequently Asked Questions

Is this ammunition built to military specifications? Yes, it’s manufactured with the same top-quality components Magtech uses in its Sniper and Tactical line, meeting stringent military and law enforcement requirements.

Is this a defensive round? No, the full metal jacket bullet is built for reliable feeding in training, tactical courses, and range work rather than personal defense.

How many rounds come in a box? Each box holds 50 rounds of 5.56x45mm NATO, with 20 boxes to a case.

Buy the Magtech First Defense 5.56x45mm NATO 55gr FMJ, 50-Round Box

Tactical training days call for ammunition that feeds the same way every time without draining the budget, and First Defense is built for exactly that. Stock the range bag and put in the reps. Order from our Lubbock, Texas gun shop and it ships fast to your door.