SI SPBUS POLY BACKUP SIGHTS
SI SPBUS POLY BACKUP SIGHTS

SI SPBUS POLY BACKUP SIGHTS

$79.95 USD
$79.95 USD $79.95 USD
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Strike Industries SPBUS Strike Polymer Backup Sights Black Folding for AR-15
The Strike Polymer Backup Sights (SPBUS) is a low-profile affordable sighting system that is designed for the AR platform and has bonus built-in sights when flipped down. No time to flip up the sights, you have backup sights on your backup sights. The SPBUS sights are made with lightweight and durable SI Polymer Extreme material with steel mounting tab and insert that can handle any wear and tear you throw at it without any major issues. As long as you've got a Picatinny rail, you will have these SPBUS mounted in minutes. Both sights are capable of flipping down nice and low so you don't have to worry about them being in your way when they're not in use or snag on any gear. The SPBUS does not have an internal spring so you don't accidently deploy the sights when you don't need them. Since the SPBUS sights are slightly taller than standard A2 sights (2.3mm/0.09" taller), the SPBUS is designed and optimized to have both sights paired together and not with other sights. To zero the sights or make any adjustments, the rear sight has an easy-to-use knob for adjusting windage while the front sight elevation is easily and quickly adjusted without tools. The rear SPBUS has dual apertures at 4.70mm(0.19") for longer eye relief, low light and faster target acquisition; and 1.75mm(0.07") for shorter eye relief and greater accuracy. Quickly slide the rear sight up and down to change to the aperture you need.




Frame Material: Steel/Polymer
Firearm Fit: AR-15
Style: Folding Back Up
Firearm Type: AR Platform
Type: Gun Sights
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SI SPBUS POLY BACKUP SIGHTS

SI SPBUS POLY BACKUP SIGHTS

$79.95 USD
$79.95 USD $79.95 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