Easton Injexion Review
The Injexion is Easton’s micro-diameter carbon with an inserted alloy H nock system. It was aimed at hunters wanting Axis 4mm level penetration without the 4mm component ecosystem. Solid arrow, quiet on release, straightness holds, but the alloy nock system is finicky and Easton has effectively replaced it with the newer Axis 4mm Long Range for most hunting.
Real specs
| Spec | Value |
|---|---|
| Spine options | 330, 400, 500 |
| GPI by spine | 330: 8.7 / 400: 7.9 / 500: 6.8 |
| Diameter | .234 outer, .166 inner |
| Straightness | +/- .003 |
| Weight tolerance | +/- 2 grains |
| Stock components | H nock press-fit + alloy nock bushing |
| MSRP per dozen | $170 to $220 |
Where it fits
Best as a 3D crossover arrow. The narrow profile gives up almost nothing on a 20 yard hunting shot and keeps a competitive speed for 3D. Long range hunting has moved to Axis 4mm because that ecosystem has better collar and half-out options for high FOC.
Common complaints
The nock bushing can rotate under repeated string wax buildup. Easton addressed this on the 4mm generation with the S nock system, which is why most hunters upgraded across. Component availability is also thinner than 5mm Axis; only three or four broadhead insert options work cleanly.
What forum users say
Injexion killed elk for me for five seasons. The 4mm Axis Long Range replaced it in my quiver only because I needed the tighter straightness for cold weather groups past 60 yards.
Archery Talk long thread on Injexion vs Axis 4mm