With a smooth sweep of the blade flipper and a continuous flick, the blade locks open. And it locks securely. Try as I might, I could not get the Alpha's liner lock to fail.
The Alpha's liner lock is secured into a heavy-duty, hard-anodized aluminum frame. When I say heavy-duty, the aluminum alloy is aerospace grade, and it should survive the worst daily life can dish out. Unlike other knives I have seen, the panel support/spacer is machined out of the right frame panel, no wimpy little spacer studs. This frame won't crush or bend under any level of normal use.
You can also get a real good grip on the Alpha. The side panel G10 inlays and the dimples on the front of the Alpha's grip frame give any operator a secure hold on the knife even in wet and slippery conditions.
SureFire's lights are known for their rugged construction and designs that allow operators to use them as pressure-control and impact weapons, when necessary. The Surefire Alpha Knife carries on this tradition.
At five inches closed, this knife is large enough that it extends from both sides of your hand. This allows you to use it as a blunt object pressure-point control device or to inflict damage in a hammer motion. This is something that can't be done with many other "tactical knives," and it can be a critical tool in a fight.