The .577 Tyrannosaur or .577 T-Rex (14.9×76mm) is a very large and powerful rifle cartridge developed by A-Square in 1993 on request for professional guides in Zimbabwe who escort clients hunting dangerous game. The cartridge is designed for use in "stopping rifles" intended to stop the charge of dangerous game.

The team from Heritage Arms shoots the real .577 T-Rex at Louland in Naples, Florida

2022年9月14日 · The .577 Tyrannosaur, also known as the .577 T-Rex, refers to a large and extremely powerful cartridge. It measures 14.9×76 mm and was developed on request for professional hunting guides in Zimbabwe back in 1993 to be used in big game hunting.

2010年4月14日 · A-Square, Inc., in .557 T-Rex (Tyrannosaurus Rex). The rifle fires a .557-inch diameter, 750-grain bullet at 2,450 feet per second from a 13.8-pound rifle. Muzzle energy is a whopping 11,000 foot-pounds.

2015年7月24日 · It is next to impossible to shoot the .577 Tyrannosaur aka the T-rex and look manly. This rifle is crazy powerful and has a recoil to match. Every so often we come across a clip of some unlucky soul go flying across a room after firing the rifle, now we have a …

2016年1月12日 · The rifle was an A-Square Hannibal chambered for their .577 A-Square Tyrannosaur (aka T-Rex) cartridge. The most powerful sporting arm/ ammo combo in the World. Indeed, the devastating recoil has to be managed by the presence of three mercury recoil reducers in the stock.

Purpose built to stop charging Rhinos, Hippopotami, and rogue elephants, it gained its name because it could indeed stop the biggest dinosaur – it’s the most powerful sporting gun in the world and shoots a 750 gr bullet at 2700 feet per second. The 13 pound gun has three mercury reducers—two in the butt stock and one in the forearm.

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Matte blued barrel with brass beaded blade front sight, fixed white-line A-Square rear sight, and quick detach scope mounts. The rifle is marked "A-SQUARE/MADE IN U.S.A." and ".577 Tyrannosaur" on the barrel with the serial number on the right of the action and "HANNIBAL MODEL" on the left as well a Remington mark below the rear scope mount.

.557T-REX是什么枪史上最强的步枪（口径是.577，用的是.577 T-REX枪弹枪是A-SQUARE用Hannibal（汉尼拔）步枪 改装来打.557的。