Accessories

C4 Front Sight Post
$19.95
Replacement aperture for all C4 Front Sights, available in many sizes for your specific application.  
C4 Rear Aperture
$15.00
Replacement aperture for C4 Rear Sight.
Oversize Shrouded Timing Nut
$18.00
Installation of Ultradyne Muzzle devices on heavy barrels requires a larger timing nut. Use this timing nut for those barrels up to 1 inch in diameter.
Sight Adjustment Tool
$15.00
Use the Ultradyne Sight Adjustment tool for easy replacement of rear sight apertures or to adjust elevation of A2-style front sight posts.  
Muzzle Device Collar
$15.00
Replacement collar for muzzle devices without a Dynamount accessory such as the C4 Dynamount Front Sight mounted.