Outsert

An outsert is a point-end adapter that wraps around the outside of an arrow shaft rather than fitting inside it — the defining feature that distinguishes it from a conventional insert. Outserts are used on micro-diameter and ultra-micro carbon shafts whose inner diameters are too small to accommodate a standard threaded insert.

Details

The use case for outserts is driven entirely by shaft diameter. A standard carbon shaft has an OD of approximately 0.166–0.204 inches on micro-diameter models — far too narrow to fit a standard 8-32 or 5-16 threaded insert. Rather than shrink the insert threads to impractical dimensions, outserts sleeve over the shaft's outer diameter and provide a standard thread on the front face for any 100-grain broadhead or field point. This allows hunters and target archers to use their preferred points on ultra-narrow, high-penetration hunting shafts without custom components.

Weight options for outserts generally span 16 to 50 grains depending on manufacturer and material — Easton, Iron Will, Ethics Archery, and a handful of boutique machined-component makers each offer outsert designs. Because the outsert sits at the absolute front of the arrow, the FOC leverage of each grain is at its maximum. A 40-grain outsert on a 320-grain shaft will move FOC more per grain than a 40-grain component placed anywhere else on the same arrow. High-FOC micro-diameter hunting setups exploit this geometry deliberately, stacking front weight via outsert selection before adding any point weight.

Broadhead seating is the critical fitment concern with outserts. The broadhead's ferrule threads into the outsert body and must seat flush against the outsert's front shoulder — a zero-gap junction. Any gap between the ferrule shoulder and the outsert face creates a stress riser on impact and can cause the broadhead to rotate or strip threads under the torque of impacting bone. Before flying broadheads, thread the head completely home, confirm zero gap visually, and spin the arrow on a flat surface to check for any wobble at the head-to-outsert interface.

Outserts typically require a different installation technique from standard inserts. They are bonded to the shaft OD surface rather than the ID, so the adhesive is applied to the inside bore of the outsert (or the shaft tip) rather than to the outsert's exterior. Most manufacturers recommend two-part epoxy rather than hot-melt because outserts must resist the strong torsional forces of broadhead removal in the field. Some outsert designs use a collar system that clamps mechanically rather than relying solely on adhesive, addressing the concern that a shaft-OD bond has less surface area than an ID insert bond.

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Common questions

Should I use an outsert or an insert for my setup?: If your shaft has an ID large enough for a standard insert, use an insert — the bonding area is greater and the resulting joint is mechanically stronger. If your shaft is a micro-diameter or ultra-micro model (common on premium hunting carbons like the Easton FMJ 4mm, Axis 4mm, or similar), the shaft ID may be too small for a standard insert thread and an outsert is the correct solution. Check your shaft's specification sheet for the recommended point-attachment system — the manufacturer's recommendation takes priority over general guidance.
Why would I choose outserts over standard inserts when both are available?: The most compelling reason to prefer outserts on a compatible shaft is FOC leverage. An outsert wraps around the shaft tip, positioning every gram of its mass at the very front of the arrow — maximizing the FOC contribution per grain. A 40-grain outsert moves FOC more than a 40-grain insert that recesses slightly behind the shaft face. For bowhunters targeting high FOC values (18–25% under the Ashby framework), outserts enable front-loading that would otherwise require unreasonably heavy broadheads or extremely long, heavy inserts.
Will outserts hurt my accuracy compared to standard inserts?: When properly installed, outserts do not inherently reduce accuracy. The concern is concentric alignment — the outsert must sit perfectly centered on the shaft so the broadhead or field point runs true with zero wobble. Any eccentricity at the outsert-to-shaft bond shows up immediately as a planing broadhead or visible oscillation in the arrow. Install outserts with care, cure fully before spinning, and check with an arrow spinner before shooting. A well-installed outsert on a well-tuned setup groups as tightly as any standard insert build.

Outsert

Details

Common questions

Should I use an outsert or an insert for my setup?

If your shaft has an ID large enough for a standard insert, use an insert — the bonding area is greater and the resulting joint is mechanically stronger. If your shaft is a micro-diameter or ultra-micro model (common on premium hunting carbons like the Easton FMJ 4mm, Axis 4mm, or similar), the shaft ID may be too small for a standard insert thread and an outsert is the correct solution. Check your shaft's specification sheet for the recommended point-attachment system — the manufacturer's recommendation takes priority over general guidance.

Why would I choose outserts over standard inserts when both are available?

The most compelling reason to prefer outserts on a compatible shaft is FOC leverage. An outsert wraps around the shaft tip, positioning every gram of its mass at the very front of the arrow — maximizing the FOC contribution per grain. A 40-grain outsert moves FOC more than a 40-grain insert that recesses slightly behind the shaft face. For bowhunters targeting high FOC values (18–25% under the Ashby framework), outserts enable front-loading that would otherwise require unreasonably heavy broadheads or extremely long, heavy inserts.

Will outserts hurt my accuracy compared to standard inserts?

When properly installed, outserts do not inherently reduce accuracy. The concern is concentric alignment — the outsert must sit perfectly centered on the shaft so the broadhead or field point runs true with zero wobble. Any eccentricity at the outsert-to-shaft bond shows up immediately as a planing broadhead or visible oscillation in the arrow. Install outserts with care, cure fully before spinning, and check with an arrow spinner before shooting. A well-installed outsert on a well-tuned setup groups as tightly as any standard insert build.