Ultradyne C4 Sight System Combo Dynamount Flip-Up Front Sight, Flip-Up Rear Sight, Mercury Muzzle Brake AR-15 1/2"-28

  • Product #: 274625
  • Ultradyne #: UD10790
  • UPC #: 851019008392
Ultradyne C4 Sight System Combo Dynamount Flip-Up Front Sight, Flip-Up Rear Sight, Merc...
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MSRP: $349.00
Special Order
Est. In-Stock if ordered today: 03/06/2019
Made in USA
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Product Overview


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

Mercury Muzzle Brake

  • Progressive 90 Degree Ports
  • Shrouded Timing Nut Mounting
  • 416 Stainless Steel with Ultra-Rugged SB Nitride Finish 

The Ultradyne C4 Sight System Combo includes the Dynamount Flip-Up Front Sight, Flip-Up Rear Sight and Mercury Muzzle Brake. 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 Ultradyne Mercury has been meticulously engineered to provide superior recoil reduction and neutralize muzzle rise with a smooth, balanced release of blast energy. Progressive 90° side ports vent combusting gases at intervals that spread out the recoil impulse for efficient, accurate follow-up shots. The Mercury Compensator is light-weight and includes wire-cutter design on the front.


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

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

Mercury Muzzle Brake

  • Finish: Melonite Black
  • Material: Stainless Steel
  • Length: 2.43"
  • Weight 3 oz 
  • Outside Diameter: 0.865"


Made In United States of America
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Delivery Information

Must Ship to FFL Dealer Yes
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Ships Alone Yes
Oversized Yes
DOT- Regulated Yes
Carrier Restrictions
  • Cannot ship via air
  • Cannot ship via USPS
  • Cannot ship to PO Box
  • Must ship to Contiguous US
HazMat Product Yes


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