Holds crossbow bolts so they can be fired from a Umarex T4E HDS 68 (a breech loading paintball shotgun). They can hold both 2 and 3 vane bolt styles.

NOTE: This is work in progress.

The shotgun is not very accurate to start with, these do not help with a roughly 20cm group at 5m. They go into the archery mat 4.5cm.

Bolts
Green Ones
Cheap ones from AliExpress, sizes according to the manufacture:
Length: 7.1cm about 2.79inch
Diameter: 0.75cm about 0.295inch

Red One
Hunting Bolt for the Steambow AR-6.