Terra Firma
Terra Firma FORTIS 4mm Shafts - Dozen
Terra Firma FORTIS 4mm Shafts - Dozen
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When it’s all on the line, shoot with confidence—choose the FORTIS.
The FORTIS 4mm is Terra Firma’s original arrow, tested and proven over more than a decade of successful hunts. Built for serious bowhunters, this shaft delivers a clean balance of speed, precision, and toughness.
Its slim 4mm profile and dense carbon build give it a deadly combo of penetration and stability. Paired with our 60gr alloy outsert system, the FORTIS holds a high FOC for a heavyweight arrow, giving you powerful flight and consistent hits—even when smashing through bone.
This is the arrow that made our name. Reliable. Efficient. Ready for anything.
GPI + O.D PER SPINE
250 - 13.0 gpi - 6.71mm / .264"
300 - 10.8 gpi - 6.34mm / .250"
350 - 9.5 gpi - 6.13mm / .241"
400 - 8.6 gpi - 5.97mm / .235"
500 - 7.6 gpi - 5.77mm / .227"
SPECS
.001" Straightness Tolerance - Every arrow is precision laser checked and sorted meticulously until your 12 pack is perfect.
+/- 1gn Weight Tolerance - Advanced manufacturing and careful quality control ensures consistent weight for every shaft.
4mm / .166" Inner Diameter - Micro diameter for accuracy and wind cutting performance. Compatible with all .166 nocks and other components.
32" shaft length - Ready to be cut down and assembled to your preference.
PACKAGE INCLUDES
12x FORTIS Shafts.
12x FORTIS 60gn Alloy Outserts - Spine Matched. (Must be glued in prior to use)
12x TF .166 Nocks - Short profile and durable.
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