The Bolt is a standard size marker with a solid brass archery insert epoxied inside.
It accepts standard 5/16" field point style arrowheads and there are four options available at launch. If a tip is damaged or you just want to carry something different, swap it out. All standard cap and collar colar options are available.
There are three purchase options:
*One Punch Marker Bolt with a single tip of your choice. $25
*One Punch Marker Bolt with all four tips. $30
*Two Punch Marker Bolts with all four tips. $40
Standard 5/16" field point arrowheads should fit depending on length.
Other styles of arrowheads based on the 5/16" (8-32 threads) standard should fit into the Bolt body but it's size dictates if the cap fits over it. 150 grain arrowheads seem to be the best option so far but lesser ones should still fit under the cap. As with The Byte, Bolt caps will have a very tight fit but will loosen up a bit with time and use. Adding a bit of a "twist" when pulling it off can help if it's tight.