Any carbine setup with an optic for “business” use or defensive situations, should be outfitted with a pair of backup iron sights (BUIS). No matter how hardened your glass is or how long your battery life is purported to be, anything can happen and usually at the worst moments. KRISS USA has released the Defiance line of flip up sights to be used on rifles and carbines with standard top rails.

An initial pass reveals the Defiance sight set looks on par with Magpul’s MBUIS line of flip up backup sights. We will have to wait for some real-world reviews to see if they perform well enough to consider purchasing them over a set from the polymer king.

Pricing, information and specifications can be found below.

* All photos care of RanierArms.com

Defiance Backup Sights – KRISS USA:

Rear Sight:

• Polymer and steel construction
• Mounts to MIL-STD 1913 Picatinny Rail
• Windage adjustment knob – no tools needed
• Tactile and audible detents both up and down
• Two aperture settings
• Folds flat regardless which aperture selected
• Extremely low profile
• Length Folded 2.25in / 57.15mm
• Width at Base 1.19in / 30.22mm
• Width at Body 1.19in / 30.22mmHeight Folded 0.56in / 14.22mm
• Weight 2.1oz / 59.53g
• Large Aperture Diameter 0.18” / 4.5mm
• Small Aperture Diameter 0.06” / 1.5mm
• $49.99

Front Sight:

• Polymer and steel construction
• Mounts to MIL-STD 1913 Picatinny Rail
• Elevation adjustment knob – no tools needed
• Tactile and audible detents both up and down
• Wide range of adjustment for both AR-15 and KRISS Vector
• Extremely low profile
• Length Folded- 2.0in / 50.8mm
• Width at Base- 1.19in / 30.22mm
• Width at Body- .96in / 24.38mm
• Height Folded- 0.5in / 12.7mm
• Weight- 0.5oz / 14.17 g
• MSRP: $32.99