Most fixed blades under four inches try to stay out of the way until the moment you need them. That is the appeal of the Ontario Knife Company RAT 3: it gives you a real fixed blade without crossing into belt-hog territory.
🔪 Ontario Knife Company 8665 RAT 3
Price: $94.95
Where to Buy: Amazon
The Ontario Knife Company 8665 RAT 3 is listed on Amazon at $94.95 as of August 5, 2026. It pairs a 3.9-inch 1095 carbon steel blade with a Micarta handle, a 7.9-inch overall length, and a black nylon sheath in the box.
The RAT 3 Is Still About Useful Size
The RAT 3 sits in the smaller fixed-blade lane, where a lot of outdoor knives either get too precious or too chunky. A 3.9-inch blade gives you enough edge for camp chores, food prep, cordage, light wood work, and general utility without making the knife feel like a pack tool first and a hand tool second.
That size is also why the RAT 3 keeps showing up in everyday-carry conversations. You are not buying this for batoning logs all weekend. You are buying it because a small fixed blade can be simpler and easier to clean than a folder when the task gets dirty.
Ontario’s Amazon listing positions the RAT series as versatile and durable, with carbon steel and Micarta handles across the line. The RAT 3 is the compact member of that family, with the RAT 5 and RAT 7 stepping up in blade length for heavier outdoor work.
What the 8665 Model Includes
This specific 8665 model is the plain-edge RAT 3 in black and tan. Amazon lists it with a black nylon sheath, a 3.9-inch blade length, a 7.9-inch item length, a 0.28 kg item weight, and a 3.9-inch size.
The product page also lists the included components as “knife with sheath” and the recommended use as utility. That is the right lane for this knife. It is a compact working fixed blade first, not a collector piece or a giant survival chopper.
The Amazon listing reports a 4.6-star customer rating from 717 reviews at the time checked. That does not replace hands-on testing, but it is useful marketplace context for a knife with a long buyer history.
The Steel Choice Is Old-School for a Reason
The RAT 3 uses 1095 carbon steel according to Amazon manufacturer content. That means the value story is not stainless convenience. It is toughness, ease of sharpening, and a familiar carbon-steel feel for people who already know how to maintain a working blade.
Carbon steel needs more attention than stainless steel. If you put the RAT 3 away wet, ignore the coating wear, or use it around food and moisture without cleaning it, you should expect upkeep to matter. That is not a flaw so much as the tradeoff baked into this category.
For context, Ontario’s Amazon comparison table lists the RAT 1 and RAT 2 folders with AUS-8 steel, while the RAT 3, RAT 5, and RAT 7 fixed blades are listed with 1095 carbon steel. That split makes sense for fixed blades aimed at field durability and hard-use simplicity.
The Sheath Is the Weak Point to Plan Around
The sheath is the part buyers should slow down and think through.
Amazon lists the 8665 model with a black nylon sheath, and several visible customer reviews criticize the sheath more than the knife. If you want a clean belt setup, inside-waistband carry, or a tighter fixed-blade EDC rig, plan on researching aftermarket sheath options before you buy.
That carry question matters because a fixed blade is only as convenient as its sheath. The RAT 3 may be compact, but it still needs a carry setup that fits how you actually use it.
Who Should Buy It
Buy the Ontario RAT 3 if you want a compact fixed blade with a 3.9-inch carbon steel blade, a Micarta handle, and a field-first personality. It makes the most sense for camping, hiking, hunting prep, utility work, and anyone who prefers a small fixed blade over a folder when the job gets messy.
Skip it if you want stainless steel, a polished factory carry system, or a knife that disappears in a pocket. Even at 7.9 inches overall, it needs sheath space, maintenance, and a realistic carry plan.
The best buyer is someone who sees the sheath as replaceable and the knife as the point. If that sounds backward, this probably is not your fixed blade.
The Bottom Line
The Ontario Knife Company 8665 RAT 3 still works because it keeps the formula simple: 1095 carbon steel, a compact 3.9-inch fixed blade, Micarta scales, and a price that keeps it in practical-tool territory. At $94.95 on Amazon, it is not the bargain-basement RAT 3 some longtime buyers remember, but it is still a practical little fixed blade with a clear use case.
🔪 Ontario Knife Company 8665 RAT 3
Price: $94.95
Where to Buy: Amazon
Just budget your expectations around the sheath. The knife is the reason to consider it. The carry setup may be the thing you upgrade.
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(as of July 13, 2026 18:57 GMT -05:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
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