From 1987, comes the Barrett M82A2 bullpup variant of the .50 Rifle.
From 1987, comes the Barrett M82A2 bullpup variant of the .50 Rifle.
A dive knife is an indispensable tool. Offered in a variety of styles and sizes, corrosion-resistant metals and featuring a choice of cutting edges to handle different cutting tasks, a diving knife is a must-have item. A good dive knife is a must-have when you go thru underwater knife fighting school.
Dive Knife Sizes
Dive knives range from the traditional full-sized knife’s that you generally strap to your lower leg, to compact ones that can be mounted on a BCD pocket or secured to an HP hose.
The K6 is an excellent example of a traditional-style full-sized all-purpose diver’s knife. Its large six-inch blade and ergonomic grip handle comes with an injected molded sheath and two quick-adjusting buckle straps that mount easily on the lower leg.
At the other end of the spectrum is a diver knife like the White Tip. With a blade length of about 2.5 inches and an overall length of just under six inches, this type of knife is compact enough to attach to a hose or a BCD as a primary knife or to stow in an easy-to-reach pocket as a back-up cutting tool.
Diving Knife Materials
Stainless Steel Diving Knives
Stainless steel is the most common alloy used in the manufacturing of dive knife blades. The majority of dive knives are made of either Grade 304 stainless steel or Marine Grade 316 stainless steel.
Grade 304 hard-tempered stainless steel is a very versatile metal that is used in a variety of outdoor applications. It offers resistance to surface oxidation and provides an excellent cutting edge. Because it is a little softer than Marine-Grade 316 stainless steel, a Grade 304 blade needs to be sharpened more frequently to maintain its right cutting edge. The stainless steel version of the Mako is an excellent example of a diving knife made with Grade 304 stainless steel. Marine Grade 316 stainless steel is similar to Grade 304, but it has one crucial extra ingredient: molybdenum. This is a hard, silver-white metallic element used to toughen the steel. This enables Marine Grade 316 dive knives to maintain their super-sharp edges for longer periods, plus it increases corrosion-resistance. SCUBAPRO’s premier dive knife, the TK 15, offers a six-inch Marine Grade 316 stainless steel blade. The blade surface is polished explicitly so that water can drain quickly to prevent oxidation further. Also, the thickness of the knife’s stainless steel is consistent from one end to the other, creating a high level of stiffness and strength.
Titanium Diving Knives
Another popular material for dive knife blades is hardened titanium. A titanium dive knife blade is entirely corrosion-resistant, it is lightweight yet extremely strong, and it can hold a sharp edge for a long, long time, all of which make titanium dive knives excellent cutting tools for use in saltwater environments. The lightweight, multi-function X-Cut titanium dive knife is an excellent example of a titanium cutting tool. Measuring just over five inches in overall length, its 2.5-inch blade is specially designed to maintain a highly-durable cutting edge for a long life of corrosion-free performance.
Diver’s Knife Cutting Edges, Tips and More
Dive knife blades come with either a plain edge, a serrated edge or a combination of both to handle a variety of cutting jobs.
A plain edge is good for making clean slicing cuts, or when using more of a pushing motion when control and accuracy are required – like filleting a fish. This type of cutting motion is especially useful if the cutting edge is curved. Plain edges are also easy to maintain. Anyone with a basic sharpening tool can keep a plain edge razor sharp with little effort.
A serrated edge has a series of mini-edges or teeth similar to a hand saw. A serrated edge is excellent for sawing-type cuts through heavy materials like wood or rope or stubborn kelp fronds. For example, using a plain edge it would take forever to cut through a three-quarter inch anchor line, but a serrated edge would make quick work of it as the teeth bite deep into the material with every sawing motion. A serrated edge also stays sharp for much longer than a plain edge, but it is a bit more difficult to sharpen.
Because these different blade edges excel in cutting different types of materials, most dive knives offer both, often on the same cutting plane. Normally, the plain edge can be found closer to the tip of the blade, beneath the curve or “belly” of the blade, whereas the serrated portion can be found closer to the handle for better leverage when leaning into the tougher cuts.
Since a scuba diver’s knife blade’s cutting efficiency increases in relation to its length, dive knives that sport long blades, like the TK15 and K6, separate their cutting edges, devoting the entire top length of the blade to serration, and the entire bottom length to the plain edge. This maximizes the length of each cutting edge and the overall efficiency of the knife.
When it comes to blade tips, dive knives normally come with either a blunt tip, a tanto tip, or some variation of a pointed tip.
On one end of the spectrum is the blunt tip. As its name implies, the blunt tip is flat and dulled. It is designed to be more of a prying tip than a piercing tip. It is considered safer than other tips because you can’t accidentally stab your leg or puncture your BCD when returning it to its sheath.
On the other end of the spectrum is the pointed tip. These tips come in a variety of shapes. For example, the TK15 comes with a drop-point tip. This is where the blade’s upper edge, or spine, gradually “drops” as it reaches the tip of the blade to form the tip. This is considered a strong tip that is easy to control when cutting or piercing.
The K6 and X-Cut have clip-point tips, so-named because the spine of the blade is “clipped” as it approaches the tip. This creates a narrow tip that can be very useful for piercing a line wrapped tightly around a boat propeller in preparation for a slicing or sawing cut. While not quite as strong as the drop-point, the clip-point is considered a very sharp and controllable point.
Falling in between the blunt tip and pointed tip is the tanto tip. Combining elements of blunt and pointed, the typical tanto tip offers more of an angled tip which is sharpened for cutting, like on the Mako. However, sometimes the tanto tip provides a small blunt spot as well as you’ll find on the White Tip. Both versions produce a very strong and durable tip, enabling you to do a little prying with less chance of snapping the tip, with the added ability do some cutting when working in tight spaces.
Most dive knife blades also include a notch for cutting fishing line and, depending on design, and you can sometimes find additional tools like a bottle opener (Mako), a stainless steel handle-end for hammering (K6) or a shackle key (TK15).
Unique Cutting Tools You Won’t Want to Overlook
Not all scuba cutting tools look like a dive knife. Take, for example, the innovative stainless steel Mesh Cutter. While traditional dive knives are most effective when used with a pushing motion, the Mesh Cutter is designed to be used with a pulling motion. This is a safer motion, plus it provides great leverage and lots of cutting power with minimal effort. The ultra-sharp hooked blade is ideally shaped for slicing through line and netting.
What’s the Best Dive Knive?
Like with most types of dive equipment, the ideal knife depends on your individual diving style, and how you like to carry your gear. The choices are many. The good news is that with the variety of dive knives available in different sizes, shapes, materials and mounting options, finding the best dive knife to suit your unique diving needs shouldn’t be too difficult.
ABERDEEN PROVING GROUND, Md. — The U.S. Army recently announced the selection of a new senior research scientist for terminal ballistics.
Dr. Scott E. Schoenfeld assumed the position March 17. He previously served as the senior scientist for the Lethality and Protection Sciences Campaign, chief of Armor Mechanics and chief of Impact Physics research with the Weapons and Materials Research Directorate of the U.S. Army Combat Capabilities Development Command’s Army Research Laboratory.
Terminal ballistics is a sub-field of ballistics and examines of the behavior and effects of a projectile as it transfers its energy to a target.
Across the Army there are less than 50 senior research scientists, known as STs, who serve as general-officer equivalents, advising leadership on science matters.
Schoenfeld will serve as the “as the Army’s leading expert in the field,” according to the announcement.
Schoenfeld’s experiences include oversight, guidance and execution of “broad theoretical and experimental initiatives to understand the mechanics and physics of weapon-target interactions,” as well as execution and oversight of applied research and development of programs associated with ballistics, terminal effects, mechanics, directed energy and computational science and engineering.
His responsibilities also included leadership of national and international partnerships conducting investigative programs in the areas of mechanics, physics and electro- magnetic response of materials and structures under conditions of blast, impact and penetration and the development of ceramic, energetic, smart, electromagnetic and hybrid protection technologies appropriate for battlefield deployment.
Schoenfeld earned a doctorate in applied mechanics in 1995 from the University of California, San Diego.
“My personal research experiences focus on the mechanics of materials with emphasis on multi-scale theories for single and polycrystalline materials and development of theories into computational algorithms suitable for simulation of impact conditions, penetrator-target interactions, structural failure and high strain-rate deformation of materials,” he said.
Schoenfeld has published several dozen peer-reviewed publications, ARL Technical Reports and Conference proceedings and has been active in American Ceramic Society, The Metals Minerals and Materials Society, American Society of Mechanical Engineers, The Materials Research Society, United States Association for Computational Mechanics, and the Hypervelocity Impact Society.
He has received numerous honorary awards including the Department of the Army Meritorious Civilian Service Award for cumulative contributions to the development of armor technology, a Department of Army Research and Development Award for Leadership Excellence and two Army Greatest invention awards.
“Dr. Schoenfeld’s expertise and leadership will accelerate the availability of superior, light weight, and agile protection for Army soldiers and vehicles. He will create, grow and capitalize on talent and ideas from across the DOD, industry, academia and other government agencies to accelerate availability of disruptive discoveries that will enable the United States and our partners to compete and win in multi-domain operations,” said Dr. Jeff Zabinski, WMRD director. “Internal to ARL, he will focus on our core competencies in Terminal Ballistics and Sciences for Lethality and Protection.”
“Please join me in congratulating Dr. Schoenfeld on this significant professional accomplishment as he becomes a member of the prestigious senior professional community,” wrote CCDC Commanding General Maj. Gen. Cedric T. Wins in an email to the workforce.
By CCDC Army Research Laboratory Public Affairs
CCDC Army Research Laboratory (ARL) is an element of the U.S. Army Combat Capabilities Development Command. As the Army’s corporate research laboratory, ARL discovers, innovates and transitions science and technology to ensure dominant strategic land power. Through collaboration across the command’s core technical competencies, CCDC leads in the discovery, development and delivery of the technology-based capabilities required to make Soldiers more lethal to win our Nation’s wars and come home safely. CCDC is a major subordinate command of the U.S. Army Futures Command.
Kyber Crystals have been mined for the plasma blades on the light sabers. The US Army’s Soldier Lethality Cross Functional Team is working on the design for the handles now. Field testing scheduled in 12 parsecs.
Sometimes things need thumped and sometimes they need to be small and compact. RMJ Tactical has that covered for you with the 12″ Angry Steve Hickory Thumper! The 12″ is small enough to fit in your EDC bag, glove compartment, computer case, etc. These are small enough to never be left behind.
Hand made from Tennessee Hickory and built for bashin’! Why hickory, you ask? Well aside from using local Tennessee materials, hickory excels far beyond many other types of wood for impact resistance and is very dense so it absorbs and withstands impacts very well.
Other sizes also available at www.rmjtactical.com/collections/thumpers.
Thanks PG!
Mesa, AZ
XTech Tactical, one of the fastest growing firearms accessory manufactures, is now shipping its OEM47 10/30 (MSRP $19.95) as an expansion of its “Commufornia Special” magazine line. Like the MAG47 10/30, $1 for each magazine sold off the company’s website will go towards Gun Owners of America to fight for gun rights. The magazines will also ship with a $5 off annual membership offer to Gun Owners of America.
The XTech Tactical “Commufornia Special” offers a field strippable 10rd magazine in a 30rd magazine body. This permits much easy mag changes and insertion into the rifle, while still permitting the user to clean the magazine. The term “Commufornia Special” is intended to remind and encourage the company’s customers to get involved in protecting their rights as firearms owners and supporters of the Constitution.
The OEM 10/30 will not function if its blocker is removed due to its reduced spring, and the magazine is only marked as a 10-round magazine.
About the OEM47 Line:
The OEM47 line is a result of numerous requests from rifle manufactures for XTech Tactical to offer a lower cost AK 7.62×39 magazine option to include with the sale of their rifles. However, the company would not settle for simply making a less expensive option without optimizing the value and its competitive placement in the market. The OEM47 line features an all polymer construction using a proprietary composite blend.
After 9 months of development the polymer permits the 30rd, standard capacity, version of the OEM47 to pass drop tests that more expensive US Made AK magazines will not.
The OEM47 line currently is only available as the OEM47 10/30 with the standard capacity 30rd option soon to follow. The OEM47 line up offers a great value to those looking for magazines for recreational and range use. For those looking for a battle-ready magazine, the MAG47 offers the most advanced US manufactured AK magazine on the market. The MAG47 features the most advanced polymer, stainless steel feedlips and locking lugs, where-as, the OEM47 is an all polymer construction.
Dealers can contact dealers@xtechtactical.com or Zanders Sporting Goods.
For more information on XTech Tactical please visit www.xtechtactical.com.