Easton ProComp Target 520 spine Carbon Arrows - 12 - Easton’s A/C ProComp arrow is available for compound target and field competition. ProComp is designed for top archers looking for the ultimate parallel shaft to boost scores at competitive and club-level compound events. The 4mm ProComp is an easy to tune shaft using accurate aluminum-carbon construction with reduced wind-drifting. Compatible with ACG and ACE components. For compound target and field competition Easy to tune Reduced wind drift Compatible with ACG and ACE components