CJRB Doubletap Guide: Recoil Lock V2, D2 and Titanium

The CJRB Doubletap is one of the largest folders in the CJRB line, and it is built to be used that way. A 3.86-inch blade, 0.19-inch (4.8 mm) stock, CJRB's Recoil Lock V2 and a ceramic ball-bearing pivot add up to a knife that lands between a heavy EDC folder and a folding work knife. Six configurations are currently listed on this site, ranging from a 69.99 USD G10 model in D2 to a 299.99 USD crystal-titanium model in CPM S35VN.

This guide covers every Doubletap configuration we list, the steel and handle differences between them, the published weights, and how the model compares with the rest of the CJRB catalog.

CJRB Doubletap at a Glance

Specification	CJRB Doubletap (J1970)
Blade Length	3.86 in (98 mm)
Blade Thickness	0.19 in (4.8 mm)
Blade Grind	Flat
Blade Style	Drop point
Blade Steel Options	D2 (HRC 59-61) or CPM S35VN (HRC 60-62)
Handle Options	G10, 7075-T6 aluminum, or crystal titanium
Lock Type	Recoil Lock V2
Opening	Thumb stud
Pivot Assembly	Ceramic ball bearing
Overall Length	9.1 in (230 mm)
Closed Length	5.2 in (132 mm)
Published Weight	241 g (8.5 oz) G10 to 254 g (8.96 oz) titanium

Read that weight row twice. At 8.5 to 9 ounces the Doubletap is roughly three times the weight of a compact EDC folder such as the 3.09-inch Ruffian, and about twice the 6-ounce CJRB Resource. That is not a flaw; it is the model's whole identity. A 4.8 mm blade stock and a 5.2-inch closed handle cannot be made light, and CJRB did not try.

All Six Doubletap Configurations

These are the configurations currently published on this site, with the price of each in-stock listing.

SKU	Handle	Blade	Price	Availability
J1970-BBK	Black G10	D2, black PVD coating	69.99 USD	In stock
J1970-BDE	Desert G10	D2, black PVD coating	69.99 USD	In stock
J1970-BU	Blue G10	D2	69.99 USD	In stock
J1970-BAL	Green 7075-T6 aluminum	D2, black PVD coating	79.99 USD	In stock (exclusive)
J1970-GAL	Gray 7075-T6 aluminum	D2, stone wash	79.99 USD	Out of stock (exclusive)
J1970-CPU	Crystal titanium	CPM S35VN, black PVD coating	299.99 USD	In stock

Three points worth noticing in that table.

• The G10 tier is the value tier. At 69.99 USD you get the same 3.86-inch blade, the same Recoil Lock V2 and the same ceramic bearing pivot as the flagship. D2 at HRC 59-61 is a tool steel with excellent edge retention and only moderate stain resistance, so it rewards a wipe-down after wet use.
• The aluminum tier costs 10 USD more and saves nothing in weight. The published weight of the aluminum model is 245 g / 8.64 oz versus 241 g / 8.5 oz for G10. The premium buys a machined metal frame and feel, not a lighter knife.
• The crystal-titanium model is a different class of purchase. At 299.99 USD it is four times the price of a G10 Doubletap, and the money goes to a titanium handle and clip, CPM S35VN at HRC 60-62, and a weight of 254 g / 8.96 oz. S35VN is a niobium-bearing stainless with better corrosion resistance than D2, which matters in a knife that will see sweat, rain and pocket lint.

What Recoil Lock V2 Means on This Knife

The Doubletap uses CJRB's Recoil Lock V2, a bar-operated lock in the crossbar family. The practical consequences for a knife this size are the ones you would want: the lock is ambidextrous in use, the blade can be flicked shut without putting a finger in the path of the edge, and the bar itself is a large, easily found target on a 5.2-inch handle.

We have covered the mechanism itself in a separate explainer, including how crossbar-style locks compare with liner, frame and button locks for durability. If lock architecture is your deciding factor, read Recoil Lock Knife Mechanism: How Crossbar Locks Work before choosing between this model and a frame-lock knife.

For the Doubletap specifically, the useful detail is that the pivot runs on ceramic ball bearings. A blade this heavy opens with noticeable momentum, and a bearing pivot keeps that momentum from turning into a gritty, slow action after the knife has been carried for a season.

D2 or CPM S35VN: Which Doubletap?

The steel question is really a price question, because the two steels are asked to do different jobs.

	D2 (G10 and aluminum models)	CPM S35VN (crystal titanium)
Published hardness	HRC 59-61	HRC 60-62
Edge retention	High, tool-steel class	High, with better toughness balance
Corrosion resistance	Moderate; keep it dry	Good; stainless class
Sharpening	Demands patience and good abrasives	Easier to refine than D2
In-stock price	69.99 - 79.99 USD	299.99 USD

If the Doubletap is going to be a hard-use tool that gets sharpened on a bench stone and carried in wet conditions, D2 in a coated finish is a reasonable, economical choice. If it is going to be carried daily against skin and clothing in a humid climate, and you would rather not think about rust, S35VN is the honest answer. The titanium model also carries a titanium clip, which is the one part of a heavy folder most likely to be abused.

Carrying a 9-Inch-Overall Folder

At 9.1 inches overall and 5.2 inches closed, the Doubletap is a pocket knife that makes its presence known. What that means in practice:

• Pocket choice matters. A 5.2-inch handle fits a front pocket or a cargo pocket far more comfortably than a shirt or inner pocket.
• The clip is steel on the G10 models and crystal titanium on the flagship. Both are published as such on the listings, and both are positioned for tip-up carry in the right-hand pocket.
• Thumb-stud opening suits a big knife. With 4.8 mm of stock to move, a thumb stud gives you a solid purchase; the Recoil Lock bar then closes the blade without the finger-placement care a liner lock demands.
• It is a two-hand knife in the sense that it wants to be held with intent. Under 250 g, a knife rolls in the hand during long cutting sessions. This one does not.

How the Doubletap Fits the CJRB Lineup

Model	Blade	Steel	Handle	Published Weight
Doubletap J1970	3.86 in drop point	D2 or CPM S35VN	G10, aluminum, titanium	241 - 254 g
Resource J1932	4.18 in drop point	AR-RPM9	G10	170 g
Ruffian J1924	3.09 in Wharncliffe	AR-RPM9 or S35VN	G10 or micarta	about 88 g

The Doubletap is the heavy option, the Resource is the mid-weight large folder, and the Ruffian is the compact slicer. If you already own a lightweight CJRB and want a knife for outdoor work, tire-kicking jobs and gloves, the Doubletap is the model the lineup is pointing at. If you want the same 3.86-inch reach in a lighter knife, the Latitude line and the Resource are the closer comparisons.

Who Should Buy the CJRB Doubletap

1. Hard-use carry. Buy the D2 G10 model at 69.99 USD, use it, sharpen it, do not baby it.
2. A knife that feels substantial in the hand. Buy the aluminum model; the machined 7075-T6 frame is the point.
3. A long-term keeper with premium materials. Buy the crystal-titanium model with CPM S35VN and treat it as a collectible you also happen to carry.
4. Lightweight everyday carry. Look elsewhere in the catalog. The Doubletap is not that knife and does not pretend to be.

Where to Buy

Every Doubletap configuration listed above ships from our own warehouse. Browse the full CJRB Doubletap collection for current availability, or see the complete Artisan Cutlery and CJRB catalog if you want to compare the Doubletap against lighter folders before deciding.

For background on the steel side of this decision, Wikipedia's page on D2 tool steel is a useful primer on the alloy family, and Crucible Industries is the maker of CPM S35VN.

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