CJRB Rampart J1907 Guide: D2/AR-RPM9 Liner Lock in Three Handles

The CJRB Rampart J1907 has been in the catalogue since September 2022, which makes it one of the older designs the brand still sells. It has never been a headline model, and it is not the knife most shoppers picture when they think of CJRB. What it is, though, is one of the few folders in this line-up offered in three genuinely different handle materials — G10, carbon fiber and copper — across a spread of about $20. This guide covers the published specifications of each tier, what the listing copy says the knife was built to do, and how the Rampart sits against the CJRB folders that cost the same money.

CJRB Rampart J1907 specifications

The G10 listing carries the complete spec table for the model. Note that the title lists two steels, D2 and AR-RPM9 — that is not a typo, and it gets its own section below.

Spec	Published figure
Blade length	3.5 in (89 mm)
Blade thickness	0.13 in (3.2 mm)
Blade material	D2/AR-RPM9
Blade hardness	HRC 59-61
Blade finish	Stone wash
Blade grind	Flat
Blade style	Listed as drop point; the prose calls it a broad wharncliffe
Overall length	8.23 in (209 mm)
Closed length	4.72 in (120 mm)
Handle material	G10 (G10 tier) / copper (copper tier)
Pivot assembly	Ceramic ball bearing
Clip material	Steel
Lock type	Liner lock
Weight	115 g (G10 and carbon fiber tiers), 165 g (copper tier)

A 3.5 in blade on an 8.23 in open length with a 4.72 in closed length means the blade accounts for a little over 42 percent of the knife when it is open. That is a blade-forward ratio for a folder of this size, and it is a big part of why the Rampart reads as more knife than its price tag suggests. The 0.13 in blade stock is on the thicker side for a sub-$40 flipper.

What the Rampart is designed to do

The listing copy describes a knife built around two ideas that usually pull in opposite directions — a thin profile and a big blade:

The Rampart flipper from CJRB is an unusual mix of a thin profile and a big bite in one knife. The broad Wharncliffe blade has a stonewashed finish that helps the knife resist wear.

The same copy is unusually specific about how the knife opens. The flipper tab is described as beefy and as wanting a bit of a flick of the wrist, with what the listing calls the usual snappy lockup normally afforded by the ceramic ball bearings in the pivot. That is worth reading twice if you are used to lighter modern flippers, because it describes a tab geometry that rewards a positive, committed opening motion rather than a gentle push.

The handle is described as surprisingly slim and straight, deliberately balancing the weight of the blade, and the knife finishes with a lanyard hole and a reversible pocket clip — so tip-up or tip-down carry is a matter of moving the clip rather than buying a different version. At 115 g in G10 the Rampart sits in the middle of this range: heavier than the 62 g Kain, lighter than the 170 g Crag, and heavier than the FRN Pyrite-Light models.

Three handle tiers, three prices

All three tiers are live listings for the same J1907 model code, but they are not all buyable right now:

Listing	Handle	Weight	Price	Availability
J1907 G10 (gray J1907-GYF, black J1907-BKF)	G10	115 g	$35.99	Gray in stock; black sold out
J1907 carbon fiber (J1907-BCF)	Carbon fiber per the title; the spec row still reads G10	115 g	$39.84	In stock
J1907 copper (J1907-COP)	Copper	165 g	$55.70	Out of stock

The copper tier adds 50 g over the G10 knife, which is what you would expect from swapping a composite handle for solid copper, and it is the only tier above $50. The carbon fiber tier costs $3.85 more than the G10 knife at the same published weight of 115 g. Both the G10 colours and the carbon fiber version share the same blade, the same liner lock and the same ceramic ball bearing pivot — the tiers are a handle decision, not a blade decision.

D2 or AR-RPM9: read the listing before you order

Both the Rampart title and its spec table list the blade material as D2/AR-RPM9, and the listing copy explains why:

This knife is now being produced with AR-RPM9 steel, however, the original D2 version may still be shipped. If you have a specific steel preference, please include a note in the comments section at checkout for which steel you prefer.

That is an unusually candid piece of product copy, and it makes the Rampart one of the few knives here where the steel is genuinely indeterminate at the point of listing. Hardness is published as HRC 59-61 for the model regardless of which steel ships, and both versions are stone-washed with a flat grind. AR-RPM9 is the brand's own spray-formed stainless; D2 is the high-chromium tool steel that has powered budget knives for decades. Neither is a compromise at this price, but if you have a preference, the listing tells you exactly how to state it. For background on what D2 brings to a knife, see Wikipedia on knife steel.

How the Rampart compares at $35.99 to $39.99

These four G10 folders sit inside a $4 band. Read the table as a set of trade-offs rather than a ranking:

Model	Blade	Steel	Weight	Lock	Price
CJRB Rampart J1907 (G10)	3.5 in	D2/AR-RPM9	115 g	Liner lock	$35.99
CJRB Agave J1911 (G10)	3.72 in	D2/AR-RPM9	110 g	Liner lock	$39.84
CJRB Kicker J1915 (G10)	3.52 in	D2/AR-RPM9	130 g	Recoil-lock	$39.84
CJRB Feldspar J1912 (G10)	3.53 in	D2/AR-RPM9	120 g	Liner lock	$39.99

The Rampart is the cheapest of the four and the second lightest. The Agave gives you 0.22 in more blade for 5 g less weight. The Kicker is the only knife in the group with a Recoil-lock rather than a liner lock, and it is the heaviest. The Feldspar J1912 is the most conventional package: mid-length blade, a 4.23 oz handle, a liner lock, and the most established reputation of the four. If the deciding factor is a liner lock you can service yourself, the Rampart and the Feldspar are the two options; if you want the largest blade, it is the Agave. For more on how liner locks work, see Wikipedia on the liner lock.

Data notes from the Rampart listings

• Blade style is published two ways. The spec table says drop point while the prose calls the blade a broad wharncliffe. A wharncliffe carries a straight cutting edge with no belly; a drop point has a spine that curves down toward the tip. Check the product photography rather than trusting either single line.
• The carbon fiber listing inherited a G10 handle row. Its title, SKU and handle name say carbon fiber, but the spec table still reads G10, which is what the original G10 listing publishes. The weight is identical at 115 g on both listings.
• The copper tier is not currently buyable. It is listed at $55.70 with no purchasable variants, so treat that as a reference price rather than an orderable configuration.

Frequently asked questions

Is the CJRB Rampart J1907 a good everyday carry knife?

On the published numbers it is a light, thin, blade-forward liner lock flipper at a budget price. At 115 g with a 4.72 in closed length it carries easily, and the reversible clip means you are not locked into one carry position.

What steel is the Rampart J1907 made from?

The listing says D2/AR-RPM9, with current production in AR-RPM9 and older stock possibly in D2. If the steel matters to you, the listing asks you to say so at checkout.

Does the Rampart have bearings?

Yes. The spec table lists a ceramic ball bearing pivot assembly, and the copy attributes the snappy lockup to it. Ceramic balls run against hardened steel races and are used to reduce friction and resist corrosion in a pivot — see Wikipedia on ball bearings for how the assembly works. Blade profile terms are covered in Wikipedia on blade geometry.

How does the Rampart open?

A flipper tab. There is no thumb stud or thumb hole on this model, and the copy describes a beefy tab that wants a deliberate flick rather than a light press.

Does the Rampart come with a lanyard hole?

Yes, per the listing copy, along with a reversible steel pocket clip.

Where to start

If you want the lowest-cost way into the Rampart, the G10 version is the one to watch. If you want the same knife in a denser handle, the copper tier is the collector's pick when it returns. Browse the full pocket knife catalogue, the D2 steel collection, the AR-RPM9 collection, or the liner lock collection to see where the Rampart fits, or look at the Rampart J1907 G10 listing directly.

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