Can You Remove the Nocks on Ravin R 138 Crossbow Bolts?

How Ravin R 138 Nocks and the Bushing System Work

Ravin R 138 crossbow bolts use a specific rear design that sets them apart from standard carbon arrows. Every arrow has three parts at the tail: the carbon shaft (the hollow body tube), the bushing (a small metal collar glued permanently inside the back of the shaft), and the nock (the plastic tail clip that grips the bowstring). In basic arrows, plastic nocks push directly into the bare carbon tube. In Ravin bolts, the factory bonds an aluminum bushing inside the carbon, and the nock presses firmly into that metal collar.

This design is necessary because of how Ravin crossbows fire. Traditional crossbows use a flight rail where the arrow sits flat, and the bowstring simply pushes against a loose notch. Ravin bows do not have an arrow track. The shaft floats in the air, supported only by two rest rollers at the front and the bowstring at the back. The moving trigger box holds the string, and its latch clips directly onto the special Ravin nock.

When you slide an R 138 arrow into the bow, you hear and feel an audible snap. That click tells you the trigger latch has locked onto the nock tabs. The nock holds the entire rear of the arrow securely inside the trigger mechanism until you squeeze the trigger. Because of this mechanical latch, you can remove damaged nocks or swap them out for lighted models, but you must always replace them with genuine Ravin nocks built for this system.

Why Standard Flat or Half-Moon Nocks Will Damage a Ravin Bow

Many archers wonder if they can replace a broken clip with an inexpensive flat or half-moon nock from a local sporting goods store. Crossbow shooters familiar with conventional hunting setups, such as the bows featured in our guide to the best TenPoint crossbow for hunting, are used to arrows that simply rest against the string. Those traditional systems work fine for rail-mounted bows, but putting a flat or half-moon nock on a Ravin arrow will cause catastrophic bow failure.

A Ravin trigger box cannot hold an arrow without the proprietary clip-on tabs. A flat or half-moon nock has nothing for the trigger claws to grasp. If you place a bolt with a flat nock into the bow, the arrow will sit loose and can easily slide forward or tilt off the string before you fire. If you pull the trigger while the arrow is not locked into place, the bowstring will jump right over the top or under the bottom of the arrow shaft.

When the string slips past the arrow, the bow suffers a dry fire. A dry fire means firing the bow without a properly seated arrow. In a dry fire, the bow absorbs zero energy from the shot because there is no arrow weight to push forward. All that violent kinetic energy slams directly back into the bow limbs, cams, and cables. This sudden shock can snap limbs in half, bend steel axles, derail cables, and fling sharp pieces of carbon into your face and hands. To keep your bow intact and prevent serious injury, never install generic aftermarket nocks into an R 138 arrow.

Steps to Safely Remove and Replace a Ravin R 138 Nock

Removing a damaged or stubborn nock from an R 138 bolt requires the right approach so you do not crack the carbon tube or damage the aluminum bushing. Follow these numbered steps to pull the old nock and install a fresh one safely.

1. Check the rear of the shaft for existing cracks before touching the nock.
   Reason: If the carbon tube cracked during a previous shot, twisting or pulling on the nock will crush the carbon wall and could drive sharp splinters into your fingers.
2. Grip the nock firmly using the official Ravin nock tool or padded pliers.
   Reason: Bare steel pliers with sharp teeth can slice through the soft plastic collar, crush the grip ears, and slip off during the pull.
3. Pull straight back along the arrow centerline while applying a steady, gentle twist.
   Reason: Pulling sideways puts uneven leverage on the aluminum bushing and can split the carbon seam right at the back of the shaft.
4. Keep high heat and open flames away from the back of the arrow.
   Reason: Extreme heat from a torch or heat gun breaks down the carbon resin and melts the factory epoxy holding the aluminum bushing in place.
5. Clean out any dirt, wax, or leftover plastic from inside the aluminum bushing.
   Reason: Any grit or debris stuck inside the metal socket prevents the new nock from seating completely, which causes arrow flight problems.
6. Align the new clip-on nock with your distinct cock vane before inserting it.
   Reason: The nock groove must sit in line with the proper vane so the arrow clears the rest and cables cleanly as it launches.
7. Press the new nock straight in until the rim sits completely flush against the bushing.
   Reason: Even a tiny gap between the nock shoulder and the metal collar changes the arrow distance in the trigger box, leading to latch errors or dry fire risks.

How to Check the Carbon Shaft for Hidden Damage

After you pull out the old nock, take a minute to inspect the bare shaft before pushing in a replacement. Carbon arrows can hide internal cracks that are impossible to spot at a quick glance. Use these checks to confirm the shaft is structurally sound:

• Perform a flex check by hand. Hold the arrow at both ends and bend the shaft gently into a slight curve while rotating it slowly. Listen carefully in a quiet room. If you hear any faint cracking, ticking, or popping noises, the woven carbon fibers have separated internally.
• Run a cotton ball around the rear carbon edge. Drag a soft cotton ball or a microfiber cloth around the back two inches of the shaft where the carbon meets the metal bushing. If tiny strands of cotton snag on the surface, you have uncovered a hidden hairline crack.
• Inspect the aluminum bushing for squareness and movement. Wiggle the metal collar gently with your fingers. The bushing must be rock solid. If it wobbles, spins, or shows a gap between the metal lip and the carbon edge, the glue bond has failed.
• Look inside the hollow bushing socket under a bright light. Shine a small flashlight into the open hole to verify that the inner walls are round, clean, and free from dents caused by previous arrow strikes.

When to Retire the Arrow Instead of Swapping the Nock

Crossbow arrows endure violent forces every time the trigger breaks. A high-poundage pull weight generates tremendous acceleration, sending arrows downfield at speeds well over 400 feet per second. When an R 138 arrow takes a hard hit against a target frame or gets struck by another arrow in the target, replacing the nock might not make the arrow safe.

Retire the arrow immediately if you find any split or flared carbon at the rear opening. When another arrow strikes the back of a bolt, the impact often forces the aluminum bushing backward, causing the carbon mouth to mushroom outward. Firing a bolt with a flared carbon edge will cause the arrow to shatter inside the bow upon release.

You must also discard the bolt if the aluminum bushing spins freely or slides out of the carbon tube. While some hunters attempt to glue loose bushings back into place using store-bought adhesive, doing so is unsafe. A loose bushing means the carbon tube has stretched or lost its binding resin. Re-gluing a metal collar into a compromised carbon tube invites dangerous arrow failure on your next shot.

Finally, throw away any shaft that feels lumpy, crushed, or gouged. Modern high-energy crossbow setups, such as the platforms discussed in our TenPoint TX Ultra 265 review, transfer massive shock straight into the arrow body. If an arrow passes through an animal or target and strikes hard ground, the carbon can bruise internally without splintering on the surface. When you slide your fingers down the shaft and feel a soft spot or flat area, break the bolt across your knee so nobody can shoot it by mistake, and throw it in the trash.

Frequently Asked Questions

Can I install Ravin lighted nocks on standard R 138 bolts?

Yes, you can install genuine Ravin lighted nocks directly into standard R 138 arrows. You simply pull out the stock orange or white nock and press the lighted nock assembly into the factory aluminum bushing. Make sure to use only authentic Ravin lighted nocks, as generic lighted brands will not clip into the Ravin trigger box.

Do I need glue to install a replacement Ravin nock?

No, Ravin replacement nocks are designed as press-fit parts that stay secure without glue. Adding adhesive inside the bushing makes future nock changes almost impossible and can interfere with the nock seating depth. If a new nock feels loose inside the collar, the bushing has stretched, and the arrow should be retired.

How do I remove a nock that snapped off flush inside the bushing?

If the plastic ears break off and leave the stem stuck inside the bushing, thread a small drywall or wood screw into the center hole of the plastic stub. Once the screw grips the plastic, take a pair of pliers, hold the screw head, and pull straight out. Work slowly so you do not scratch or scrape the inside of the aluminum bushing.

Will shooting an aftermarket nock void my crossbow warranty?

Yes, shooting non-Ravin nocks will void your manufacturer warranty on a Ravin crossbow. Ravin explicitly requires their proprietary clip-on nocks because generic designs cause dry fires and catastrophic limb failure. Sticking to approved Ravin nocks protects both your equipment warranty and your personal safety.