Underwood

45 Super is externally/dimensionally identical to 45 ACP or 45 ACP +P and is designed to be used in 45 ACP Semi-Auto pistols that have been modified with a stronger than normal recoil spring and a shock buffer, plus a few other modifications. While you can shoot 45 Super out of some stock 45 ACP +P pistols such as the Glock 21, HK USP, or the full-sized all steel 1911, it can cause excess wear and tear on the firearm if you do not have them modified to handle the extra pressure and slide velocity of the 45 Super.

The Xtreme Defender is based on the popular Xtreme Penetrator product line. The XD ammunition has an optimized nose flute, total weight, and velocity to achieve a penetration depth up to 18 inches* with a permanent wound cavity (PWC) that is just simply enormous; no other expanding hollowpoint comes close to achieving anywhere near this diameter and volume. Not only is the PWC over 100% larger than any other expanding bullet, expansion is achieved despite being shot through barriers. The solid copper body ensures that wallboard, sheet metal, and automotive glass will have no effect on the Permanent Wound Channel.

*Falling within FBI guidelines

This round offers:

• A permanent wound cavity (PWC)that is 2 times greater than any expanding bullet
• Reduced recoil
• Radial flutes that force the hydraulic energy inward to build pressure
• Minimal surface area to increase the force at the point of contact and sharp cutting edges that defeat barriers

Nickel-plated brass casings, our nickel plating process provides several key benefits, not limited to but including; improved feeding in all actions of firearms enhanced corrosion resistance over traditional brass, improved cosmetics, and ease of cleanup during reloading. Nickel-plated casings will not tarnish like brass during storage or when in contact with foreign materials such as leather, moisture, and other metals.

As with all of Underwood Ammo™ rounds, we utilize flash suppressed powder so that your vision will not be compromised if it becomes necessary to use your firearm in low light.

While taking advantage of our state of the art testing equipment, this high-performance ammunition is field tested using popular, real firearms that our customers are most likely to own out in the real world with all the elements you would experience.

This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.