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Description
4 barrel night vision goggles PVS-31C-4B Advanced Dual-Tube Night Vision Goggles — CTOMSDescription Experience the superior situational awareness of the PVS 31C 4B, proudly made by GSCI Advanced Photonics. This dual tube goggle system has an ergonomic low profile design and is equipped with the latest technological advancements and perfected over 30 years of GSCI's engineering experience. Built for durability, it includes a lightweight and rugged housing combined with advanced multi coated optics for exceptional image quality and can
Description
Experience the superior situational awareness of the PVS-31C-4B, proudly made by GSCI Advanced Photonics. This dual-tube goggle system has an ergonomic low-profile design and is equipped with the latest technological advancements and perfected over 30 years of GSCI's engineering experience. Built for durability, it includes a lightweight and rugged housing combined with advanced multi-coated optics for exceptional image quality and can withstand up to the weight of a pick-up truck and a drop from two meters.
Other unique operational features, such as instant IR (Morse Code Capability), standard IR (Map Reading / Zero Light Capability), external battery power port, flip-up off, selective channel engagement and stow safety provide remarkable performance and reliability.
With an array of optional accessories including magnification lenses, head mounting systems, battery packs (Including MVP-240™), and recording devices, the unit accommodates 1xAA and 1xCR123 batteries. This NVG has emerged as the preferred choice among numerous users, including law enforcement, and military agencies worldwide.
Advantages
- Adjustable Dovetail Interface
- Manual Gain Control
- Convienient DIgital Push Button Operation
- Powered by 1 AA or 1 CR123 Battery
- Built-In IR Illuminator
- Built-In Automatic Light Overload Shut-Off System
- External Power Port
- Momentary and Constant IR-On Button
- Stow Safety
- Flip-Up Off Features
Kit Contents
- Dual-Tube Night Vision Goggles Dovetail Bracket (Pre-Installed)
- Rubber Eyecups (2pcs, installed on the device)
- Sacrificial Window (2pcs)
- Stow Safety Feature (Integrated)
- AA Battery Extension Adapter (Installed on the device)
- Rubber Daytime Filters with Training Hole (Installed on the device)
- Adjustment Kit (Alley Ley + Mini-Wrench)
- Neck Cord
- USB Power Cable
- Soft Carrying Pouch
- User Manual
- Cleaning Kit (3-in-1 Multi-Pen + Soft Cleaning Cloth)
Optional Additional Equipment
- GSCI-VIVID Lightweight High-Performance Front and Rear Optics (Model Name: PVS-31C-4B-MOD)
- Advanced Helmet Mount GR8™
- Universal Multi-Voltage Battery Back MVP-240™
- Hard Carrying Case: Waterproof with Foam Insert
- Advanced Helmet Harness HMH-1 for MICH / ACH Helmets
- 3X Magnification Afocal Add-On Objective Lens SL-3: Snap-On or Screw-In
- 5X Magnification Afocal Add-On Objective Lens SL-5: Snap-On or Screw-In
- Smartphone Camera Adapter CAS-14
- Tactical Infrared Illuminator IR-250S: Kit Includes IR-250S (850nm), Remote Control, Picatinny Mount
- Digital HD Recorder with Built-In Display and Video Output NVR-714-D
Features
- Universal Night Operations Tool
- Multi-Use System Design
- Unique Safety Features
- Extended Range Observation
- High Situational Awareness
- Preferred Choice of NATO Forces
- External Power Port
- Compatibility with Head Gear and Helmet Mounts.
- Flip-Up-Off Feature: Automatically turns off when flipped up.
- Stow Safety Feature: Shuts off the unit when stowed and powers it back on when returned to the horizontal position.
- Selective Channel Engagement: When used with GR8 or any compatible mount, articulating night vision channel up disengages it - PVS-31-4B can effectively become a single-eye goggle system.
- External Power Port: Along with conventional AA and CR123 Batteries, PVS-31-4B can be powered from external power sources such as GSCI MVP-240™, USB power banks and 12V car power supply.
Specifications
| Optical Magnification | 1X |
| Objective Lens | 27mm, f/1.2 |
| Field Of View | 40° |
| Focusing Range | 0.25m .. Infinity |
| Diopter Adjustment Range | -6 .. +2 |
| Digital Push Button Controls | Yes |
| Built-In IR Illuminator | Yes: 950 nm |
| IR-On Indicator | Yes: concealed into FOV |
| 3-Position Switch | Yes: Off/On/IR |
| Adjustable IR Illuminator Intensity | Yes: 3 Stages |
| Adjustable Light Sensor Sensitivity | Yes: 3 Stages |
| Programmable Automatic Shutdown | Yes:10 .. 60 Minutes of Inactivity |
| Bright Light Protection | Yes |
| Bright Light Sensor | Built-In |
| Low-Battery Indicator | Yes: concealed into FOV |
| Stow Safety Feature | Yes |
| Flip-Up-Off Feature | Yes |
| Power Source | 1x AA / MVP-240™ |
| External Power Port | Optional: 4V DC .. 15V DC |
| Battery Life | 40 Hours on 1x AA, 240 Hours with MVP-240™ |
| Environmental Protection | Waterproof |
| Dimensions | 108 x 58 x 51mm |
| Weight | 162 grams |
| Operating Temperature | -40°C .. +50°C |
| Made In | Canada, ITAR-Free |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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4.1 ★★★★★
Based on 2488 reviews
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Product Reviews
★★★★★ 4
Good for basic x86 64 but avx coverage is horrible.
Format: Paperback
After having read Irvine 7th I had a good knowledge of x32 but soon enough I realized it’s all obsolete so now it’s on to Hyde 64. The hello world program involves interfacing to c++ and assembly/linking with batch commands. Really? I’m using visual studio ide have you heard of build and run? Hyde doesn’t even mention the debugger and without this tool assembly language is impossible. But I was already familiar with this after reading Irvine so I was ok. The following chapters 2 to 9 about 600 pages worth are great so for what I paid the book is 4 stars. Great explanation, lots of complete programs. Now it’s time for parallel processing via Simd and avx and this is chapter 11, over 100 pages of instructions with no examples. It could be useful for reference but actually, no. Amidst all the formats, memory operand and register sizes the actual explanations of the instructions are vague. Well that defeats the purpose of thumbing this chapter as a reference doesn’t it? But where Hyde fails Kusswurm modern x86 begins. If you’ve made it this far sell Hyde, Irvine, and buy Kusswurm. Then you’ll have Jedi powers like me.
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Reviewed in the United States on December 5, 2023
★★★★★ 5
Not for the faint of heart
Format: Paperback
This is the book
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Reviewed in the United States on August 5, 2022
★★★★★ 5
It benefits the high-level language programmers - Listing formatting good now
Format: Paperback, Format: Paperback
Even if not writing assembly code directly, it benefits the high-level language programmer to understand the CPU architecture and instruction set. You can help the compiler do a better job by writing your code with the hardware in mind. When it comes to debugging, it can be helpful to look at things at the assembly level.
And if you are programming with SIMD intrinsics, you are still programming in assembly language and understanding the architecture is necessary.
This book gets you up to speed with all the above and more.
Also, the listing formatting problem that others have mentioned seems to have been fixed. I deleted the months old download from my device, downloaded again, and the listing were now good. Tested on an iPad, a Kindle Paperwhite, and a MacBook Pro.
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Reviewed in the United States on April 25, 2025
★★★★★ 5
Bible on x64 Assembler, but not for coding beginners.
Format: Paperback, Format: Paperback
The best way to review this book is in two parts, 1st a review of the book, 2nd to address the negative reviews about the readability of the code in the Kindle edition which is the one I have.
I have several books on Assembly Language, starting with the long out of print 1986 “Peter Norton’s Assembly Language Book for the IBM PC.” Over the years I have acquired several books on Assembly Language. I find Randall Hyde’s book to be hands down the best reference and most in depth book on x86/x64 Assembly language. What I feel separates Hyde’s book from others is it goes into detail on each register and machine function. Which is then backed up with numerous illustrations to help explain the concepts, code, and quizzes to test your understanding.
This is not a book for coding beginners on x86/x64 Assembly, IMO, as the author jumps right in with examples that I feel are too complex and too verbose for the novice. To help fill in the gaps alongside this book, I recommend using Mike McGrath’s, “Assembly x64 Programming in easy steps”, which guide the novice with colorful illustrations step by step, on the processor, number systems, linking, and building basic Assembly programs, in byte sized chunks, that are easy to understand for the novice.
Also, a basic knowledge of C++ will be needed to use this book, as several example C++ programs make Assembly calls from within the program. Again, I recommend Mike McGrath’s “C++ Programming in easy steps.” For a basic review if you lack C++ knowledge.
You’ll need the free IDE Visual Studio 2022 Community edition (not VS Code) with the C++ libraries, as that is where the MASM is located.
As for the readability of the code in the Kindle version, there is a workaround which is better than reading the code from the book. A link is provided to download all the code listed in the book in a zip file. Most of the code is organized by listing number from the book. Once VS2022 is on your computer, double-click on the download file you’re interested in and the code will open properly formatted in VS2022 as shown in the attached images. You will be able to interact with the code, which is more productive than just reading from the book.
This is an excellent book on x86/x64 Assembly language, looking forward to volume 2. After reading this book, the only way to get further in depth knowledge of the x86 processor IMO is from Intel's massive 4 volume reference.
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Reviewed in the United States on February 6, 2022
★★★★★ 4
Good reference manual for64 Bit Assembly Programming. Not an Introductory text.
Format: Paperback
I initially bought Assembly x64 in easy steps: Modern coding for MASM, SSE & AVX which is an excellent introduction to 64 Bit Assembly. This book however IS NOT an Introductory book - it is more a Reference to X64 Assembly. If you are new to Assembly Programming I suggest buying the introductory book and if you are serious about Assembly Programming then buy this book.
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Reviewed in the United States on March 14, 2024
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