FAB FX-RBS RBS REAR BACKUP SIGHT
FAB FX-RBS RBS REAR BACKUP SIGHT
FAB FX-RBS RBS REAR BACKUP SIGHT

FAB FX-RBS RBS REAR BACKUP SIGHT

$55.20 USD
$55.20 USD $55.20 USD
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FAB Defense FXRBS Rear Back-Up Sight for AR-15/ M16/ M4 Dual Aperture Low Folded Profile Spring-Locked Deployment Black Polymer & Metal
The RBS is an advanced, low-profile, durable, auxiliary rear sight. It can be used with any front sight, but has been designed to provide an extreme optical advantage. It is readily mounted on any 1913 Picatinny rail, making it ideal for use on M4/AR-15/M-16 platforms. The sight can be used as a primary or back-up sight and the ergonomic angel-wing-shaped front shroud helps center the image with any front sight. The low folded profile is smooth and inconspicuous and will not snag on gear, webbing or brush. The dual apertures are 3mm for longer eye relief mounting, low light and faster target acquisition and 1.5mm for shorter eye relief mounting and greater accuracy. The sight is also made of extremely durable high-grade polymer and metal and has an instant spring-locked deployment mechanism that will not slip, break or deform.




Type: Folding Rear
Frame Material: Polymer/Metal
Frame Color: Black
Firearm Fit: AR-15
Style: Folding Rear Sight
Windage Adjustment: Yes
Firearm Type: AR Platform
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FAB FX-RBS RBS REAR BACKUP SIGHT

FAB FX-RBS RBS REAR BACKUP SIGHT

$55.20 USD
$55.20 USD $55.20 USD

Perfect daypack for everyday carry

I’ve been using this backpack as my daily carry bag, and it’s absolutely brilliant. Compact, tough, and surprisingly spacious for its size. It fits my water bottle, lunch, tools, and even a small tablet with no problem. The MOLLE webbing makes it super customizable. Can’t recommend it enough for urban or light outdoor use!

— Marko Mäkinen

Ideal for short hikes and versatile use

This backpack its the sweet spot between size and functionality. I’ve taken it on weekend hikes and as a travel companion—it performs flawlessly. It’s built like a tank, comfortable to wear for long stretches, and the internal frame adds excellent support. Definitely worth every penny!

— Just Me

Serious gear for serious adventures

I’ve used this backpack on multi-day treks and it’s a beast. The build quality is outstanding—everything from the zippers to the straps feels durable and reliable. The side pouch system and internal organization make packing efficient. It’s the best large pack I’ve ever owned for backcountry trips.

— Mike Hiker

The ultimate load hauler

If you need a pack that can handle serious gear and harsh conditions, this is it. I use it for hunting and winter expeditions—it swallows everything I throw at it and distributes weight beautifully. The modular design lets me adapt it to any mission. Truly a professional-grade backpack.

— Author's name