Our aluminum InterFrame build SF folders share a unique design offering a combination of Carson Series features requested by military procurement specialists. The deep-bellied spear point blades were specified because they offer maximum strength. The open build allows two Carson Flippers to be incorporated, resulting in a true hilt — very rare in folding knives. 

M21^™-14SF Aluminum. Our production aluminum frame SF is based on Kit Carson's custom designs, with contoured handles of black, hard anodized 6061 T6 aluminum, with a perimeter radius. Stainless steel locking liners with friction grooves give positive locking. Blade steel is AUS 8 stainless with a Combined Razor-Sharp and Triple-Point^™ Serrated edge. 

Blade, frame and hardware are non-reflective tactical black. The blade receives a black titanium nitride coating for maximum corrosion resistance. Kit's trademark dual checkered thumb studs are standard. One-hand opening and closing is quick and smooth. 

It also features our exclusive patented (1) AutoLAWKS^™, the Lake and Walker Knife Safety innovation taken to the next level. AutoLAWKS^™ automatically sets a pin between the locking liner and the frame. This pin acts as an additional layer of safety, so the locking liner is less likely to disengage during use. To close the knife, pull the AutoLAWKS^™ red button lever back, slide the locking liner over, and fold the blade into the closed position.. 

All knives in this series are equipped with clip options that allow four-position carry on belts or webbing. Caution: These knives are not designed for tip-up in-pocket carry. They are special knives, designed by the military for special forces use. 

U.S. Patent No. 7,437,822