Flat nock: which crossbows use it
Where the Flat nock is used, its shape, and the compatibility rule that stops a dry-fire.
Dry-fire warning
Crossbow bolt data and archery arrow spine, nock and thread data are quoted from each manufacturer's published figures, owner documentation and industry standards, cited on every page. A nock, spine or grain-weight mismatch can cause a dry-fire that damages the bow and can injure the shooter. Confirm against your own owner's manual and the arrow maker's own chart before shooting, and never drop below the stated minimum total weight.
| Nock | flat (flat-back) nock |
|---|---|
| Form | plain flat disc on the shaft base, non-indexed |
| Fits | Excalibur Micro series and older recurve crossbows |
| Compatibility rule | The flight groove and rail must align the string to the centre of the flat base. Excalibur supplies flat-nocked arrows for the Micro series; it does not require proprietary arrows but cautions against anything under 350 total grains. |
Field notes
Used on: Excalibur Micro series and older recurve crossbows.
The flight groove and rail must align the string to the centre of the flat base. Excalibur supplies flat-nocked arrows for the Micro series; it does not require proprietary arrows but cautions against anything under 350 total grains.
A flat nock relies on the rail keeping the string centred. On a bow set up for a captured nock, a flat nock can let the string slide off-centre. Match the crossbow's designed nock family.
Crossbows and comparisons
Sources: Excalibur - Arrows and nocks · Excalibur - Quill 16.5 carbon arrow