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Home Shop Entry Level Fountain Pens Gravitas - Sentry Raw Stainless Steel
GravitasSKU: GP-FP-SY-SST-11/SI-SN6

Gravitas - Sentry Raw Stainless Steel

€115,00 /
Tax not included. Shipping calculated at checkout.
5.0 (2 reviews)
Nib: Steel
Nib Size: Extra Fine
Gravitas - Sentry Raw Stainless Steel
€115,00 /
Nib: Steel
Nib Size: Extra Fine

 
 
Description

Meet the upgraded Sentry fountain pen, the larger sibling to the entry-level model from gravitas. While slightly weightier than its counterpart, the Sentry maintains a comfortable and user-friendly design, thanks to its weighted section. With triple-start ACME cap threads, the cap effortlessly disengages in just 2.25 turns.

Constructed from 304 stainless steel, the section is black PVD coated and features micro-machined grooves for an enhanced grip. To prevent marks from posting - the cap features a delrin sleeve and the upgraded Sentry series now comes with two o-rings, one on the section and one on the barrel, enhancing the experience while carrying and using the pen - preventing the accidental uncapping or untwisting of the section.

Equipped with a Gravitas-production size 6 steel nib compatible with Jowo No. 6 threads and abs plastic feeder, the Sentry offers versatile writing options, including Extra Fine, Fine, Medium, Broad and Fine Flex.

Enhancing your experience, the Sentry comes with a standard international converter provided with each fountain pen. If a larger ink capacity is needed - the Sentry Stainless Steel is eyedropper friendly.

Elevate your writing journey with the refined craftsmanship of the Sentry fountain pen.

Specifications:

- brand: Gravitas
- type: Fountain Pen
- color: Silver
- body material: Stainless Steel
- cap type: Screw-cap
- filling mechanism: Provided Converter / Standard International Cartridge
- nib material: Steel
- nib size: Extra Fine, Fine, Medium, Broad, Fine Flex
- postable: Yes
- trim: Silver color
- length overall (closed): 147 mm
- length overall (posted): 162 mm
- body length: 138 mm
- cap length: 62 mm
- body diameter: 14 mm
- cap diameter (without clip): 15 mm
- weight (overall): 84,5 grams
- body weight: 56,4 grams
- cap weight: 28,1 grams

Specifications

Brand: Gravitas
Model: Sentry
Edition:
Color: Silver
Body Material: Metal
Finish:

Cap Type:
Screw
Filling Mechanism:
Cartridge Converter
Postable:
Yes
Trim Color:
Length Overall (Closed): 147 mm
Length Overall (Posted): 162 mm
Body Length (Uncapped):
138 mm
Body Diameter: 13.25 mm
Cap Diameter (Without Clip): 15 mm
Weight Overall: 84.5 g
Body Weight: 56.4 g

Customer Reviews

Based on 2 reviews
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D
Destiny Smith
The Pen of Steel!

This pen is very unapologetic about itself. This pen, to me, is what the definition of the word “gravitas” should look like. This pen is medium large, long enough for a standard cartridge converter, the #6 nib is just the perfect size for this size pen, and the girth is just right. And best of all, it’s made from stainless steel! That pen will survive long enough to allow you to write the Chronicles of the Apocalypse, using Zombie Blood. But seriously, aside from minor scuffs and scratches, this pen, with proper care and cleaning, will be perfectly serviceable in another 100 years.
The Fine nib on my pen is very smooth, and nib unit has excellent ink flow. If you find that the ink flow is too wet, try changing to a “drier” ink, like Pelikan 4001 Königsblau.
Despite the weight of the pen, I find I can write with this pen for longer periods without fatigue. To me, grip diameter, especially a thin grip diameter, causes hand fatigue much more rapidly than writing with a pen that weighs 56 grams. The all that weight is sitting on the web of my hand between thumb and forefinger, right near the center of balance of the pen.
I’m very happy with the look, feel, and performance of this pen. Would definitely buy again!

C
Clay
Breathtaking Pen

This pen is absolutely fantastic. The textured grip prevents slippage during long writing sessions, which is a huge plus for me since my hands tend to get more moist than others. The sentry has a comfortable weight to it and since it leans on the heavier side, it takes away the wrist pain I get from writing with lighter pens. I haven't experienced any ink leaks during its use/transportation, and after observing the inner workings of the pen, I think it's quite resistant to leakage. The ink cartridge filling process is very easy! My pen shipped from EU to USA and arrived in less than a week with no issues. Very happy with my customer experience with pen-venture.

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© 2026 Pen Venture - Passion Virtuous,

★ Reviews

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857 reviews
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A
Gravitas - Vac 2.0 Aluminium | Black
Andreas Andersson
Substantial, reliable, and smooth

The Gravitas Vac 2.0 is an amazing tool for handwriting. The nib is smooth, distinct, and reliable, and it has some weight due to its durable materials, black aluminium/aluminum and ultem, the perfect combination of a tool which will survive most of us, still functioning if the internal vacuum piston system is cared for. I have enjoyed this fountain pen for seven days and I am pleased to say it is one of my better ones, and it is fun to use. I recommend it.

(Emy was correct: The nib has great flow, about six drops of ink will automatically flow from the nib after I have just filled it, after that no problems; tissue paper or the ink bottle under the nib until that happens is recommended, other than that: an excellent fountain pen.)

D
Tombow - Mono Sand 512B | Ink Eraser
Dan Shapiro
Mono sand combo eraser

This is good. It erases well

N
Gravitas - Vac 2.0 Aluminium | Black
Nabil Zouari
FANTASTIC !!!!!

What a fantastic pen—and customized too!

It writes beautifully and arrived surprisingly quickly, even though I’m in Canada. This is my third order from Pen Venture, and once again, the experience has been outstanding. It's always a pleasure to come back.

My Gravitas arrived perfectly tuned and was ready to write straight out of the box. I filled it with Pelikan Royal Blue, and from the very first stroke, it was smooth, consistent, and an absolute joy to use.

I own several excellent fountain pens, including a Pilot Custom 823, a Sailor 1911, and a Leonardo Momento Zero, and I can honestly say that this Gravitas holds its own among them. It is remarkably well made and comes very close to being the perfect writing instrument.

A big thank you to the entire Pen Venture team for the exceptional service, careful tuning, and attention to detail. I’m already looking forward to my next order!

C
Gravitas - Vac 2.0 Aluminium | Black
Cosmin R.
A Worthy Sequel to an Awesome Pen

On its own, this pen feels very durable and premium, and the bead-blasted, matte black coated treatment gives it a very “professional” vibe. The Fine nib is bouncy and smooth, very usable on the underside as well (with added feedback, but not scratchy), the ribbed steel grip is very comfortable, the feed holds a lot of ink on its own, and the reservoirs behind it will keep it in writing condition for dozens upon dozens of pages after a fill.

The cap screws open and closed smoothly, with a very satisfying click at the end when closed; it posts deeply, and it also posts securely after being pressed down slightly on the barrel. It is light enough that it does not back-weight the pen significantly when posted.

The barrel construction, along with the newly-implemented Kraken filling system, ensure a significant amount of ink is pulled in from the first try. Much like the main cap, the blind-cap screws open and closed smoothly for refills or ink transfers between reservoirs.

Compared to its predecessor:
Fewer transparent areas overall, but the Vac 2.0’s structure feels more solid than the Ultemate Vac.
The body thickness and thread profiles are different on the Vac 2.0 than on the Ultemate Vac, no mix-and-match potential here.
The matte black coating gives the pen a more refined, premium feel on the metallic parts.
The inner lining of the cap doesn’t get stuck in the barrel thread as often, and when it does, it either slips back into correct position, or it is easier to unscrew and reposition, without the metal thread eating into the cap material.
The coated, no-breather-hole design of the new Gravitas steel nib may not be to everyone’s taste, but I like it a lot, and functionally, this nib feels more bouncy and polished, with smoother writing than its predecessor.
The feed seems to pick up a lot more ink on its own from just a 5-second dip, and the small reservoir behind it looks to have more capacity to back it up before needing to unscrew the blind cap and refill it from the large reservoir.
The Kraken filling system seems to suck up significantly more ink per pump than the mechanism from the Ultemate Vac.

Overall, a very well made fountain pen, and a thorough refinement to an already excellent design. Very satisfied with this purchase!

User picture User picture
K
Gravitas - Vac 2.0 Aluminium | Black
Keith Schumacker
Great Little Monster

Wow!
Just like the Monster but thinner. For me it is more comfortable for longer writing sessions. The filling system is stellar. Holds lots of ink. As always Ben Walsh and Emy have delivered a innovative and enjoyable writing experience. Can't wait to see what's next. Keep up the wonderful work!

123
Review picture
Cosmin R.
A Worthy Sequel to an Awesome Pen

On its own, this pen feels very durable and premium, and the bead-blasted, matte black coated treatment gives it a very “professional” vibe. The Fine nib is bouncy and smooth, very usable on the underside as well (with added feedback, but not scratchy), the ribbed steel grip is very comfortable, the feed holds a lot of ink on its own, and the reservoirs behind it will keep it in writing condition for dozens upon dozens of pages after a fill.

The cap screws open and closed smoothly, with a very satisfying click at the end when closed; it posts deeply, and it also posts securely after being pressed down slightly on the barrel. It is light enough that it does not back-weight the pen significantly when posted.

The barrel construction, along with the newly-implemented Kraken filling system, ensure a significant amount of ink is pulled in from the first try. Much like the main cap, the blind-cap screws open and closed smoothly for refills or ink transfers between reservoirs.

Compared to its predecessor:
Fewer transparent areas overall, but the Vac 2.0’s structure feels more solid than the Ultemate Vac.
The body thickness and thread profiles are different on the Vac 2.0 than on the Ultemate Vac, no mix-and-match potential here.
The matte black coating gives the pen a more refined, premium feel on the metallic parts.
The inner lining of the cap doesn’t get stuck in the barrel thread as often, and when it does, it either slips back into correct position, or it is easier to unscrew and reposition, without the metal thread eating into the cap material.
The coated, no-breather-hole design of the new Gravitas steel nib may not be to everyone’s taste, but I like it a lot, and functionally, this nib feels more bouncy and polished, with smoother writing than its predecessor.
The feed seems to pick up a lot more ink on its own from just a 5-second dip, and the small reservoir behind it looks to have more capacity to back it up before needing to unscrew the blind cap and refill it from the large reservoir.
The Kraken filling system seems to suck up significantly more ink per pump than the mechanism from the Ultemate Vac.

Overall, a very well made fountain pen, and a thorough refinement to an already excellent design. Very satisfied with this purchase!

Gravitas - Vac 2.0 Aluminium | Black