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
- Includes 10 MOA Dynalign Aperture and Front Post
- CNC Machined Aluminum

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
- Includes .070" Aperture
- CNC Machined

Athena Linear Compensator:

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