The Ultradyne C4 Sight System Combo includes the Dynamount Flip-Up Front Sight, Flip-Up Rear Sight and Athena Linear Compensator. The Ultradyne C4 Flip-Up Rear Sight utilizes Ultradyne's exclusive dynalign sight picture technology for accurate and immediate acquisition. Most BUIS systems utilize a sight picture that is non-intuitive. In such systems, the brain's visual systems are asked to align a circular rear aperture with a rectangular front post shape while simultaneously ignoring the 'ears' that protect the front sight post. Dynalign's circle-within-circle sight picture allows for faster sight picture acquisition. Additionally, the use of a front aperture further reduces parallax effect which makes accuracy less depend on precise sight alignment. Dynalign is a faster and more accurate sight picture than can improve shooting performance.

The C4 Ultradyne Flip-Up Front Sight features a purely concentric sight picture with windage and tool-less elevation adjustability. Designed for maximum flexibility, the Dynamount Front Sight is barrel mounted which greatly reduces sight movement compared to free-float handguard mounting. The Flip-Up Front Sight is also indexable to 45 Degrees for offset use, making it an absolute must have feature for competition shooters engaged in 3-Gun shooting.

The Athena Linear Compensator is optimized to reduce muzzle rise with gas being vented at an angle and then forward. This sends a lower percent of sound back towards to shooter. By pairing the Athena with the Dynamount Flip-Up Front Sight, users will benefit from the elimination of sight deflection associated with handguard mounting.

Features C4 Dynamount Flip-Up Front Sight:

- Purely Concentric Sight Picture
- Maximum Flexibility
- Windage-Adjustable for Zeroing
- Indexable to 45 Degrees for Offset Use
- CNC Machined Aluminum

Includes:

- 10 MOA Dynalign Aperture
- Front Post

Features C4 Flip-Up Rear Sight:

- Purely Concentric Sight Picture
- Maximum Flexibility
- Superior Side-Adjust Ergonomics
- One-Handed Deployment and Stowage
- Interchangeable Aperture
- MIL-STD-1913 Picatinny Rail
- CNC Machined

Includes:

- .070" Aperture

Features Athena Linear Compensator:

- Shrouded Timing Nut Mounting
- 416 Stainless Steel
- Ultra-Rugged Nitride Finish

Specifications C4 Dynamount Flip-Up Front Sight:

- Finish: Matte
- Material: CNC Machine Aluminum
- Height: 0.369"
- Width: 1.21"
- Weight 2.2 oz.
- Adjustable Click Value: 1.25 MOA
- Maximum Windage Adjustment: 40 MOA
- Maximum Elevation Adjustment: 28 MOA

Specifications C4 Flip-Up Rear Sight:

- Finish: Salt Bath Nitride
- Material: 4140 Chrome Moly Steel
- Height: 0.369"
- Length: 1.38"
- Weight: 2.5 oz.
- Adjustable Click Value: 1/2 MOA
- Maximum Windage Adjustment: 40 MOA
- Maximum Elevation Adjustment: 18 MOA

Specifications Athena Linear Compensator:

- Finish: Melonite Black
- Material: 416 Stainless Steel
- Length: 1.69"
- Weight 3.8 oz.
- Outside Diameter: 0.975"