Scopes

Mounting a crossbow scope

Rail types, ring height, eye relief and torque. Most lost zeros and most scope-bite complaints trace to one of these four.

By Mike M.Updated October 6, 2026

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Ranked

Quick picks

#	Product	Objective	Score	Price
Rank 1	TRUGLO 4x32 Compact Crossbow Scope A 4-inch eye relief replacement scope	32 mm	7.0	$53.75Amazon
Rank 2	Vortex Crossfire II 2-7x32 Crossbow Kit The warranty you will never need to think about	32 mm	8.6	$199.00Amazon
Rank 3	CVLIFE 4x32 Compact Short and light on a compact bow	32 mm	7.4	$62.99Amazon
Rank 4	Hawke XB1 SR 1.5-5x32 Calibrated aim points out to 100 yards	32 mm	8.7	$159.99Amazon
Rank 5	TenPoint RangeMaster 100 Fast bows, past 400 fps	36 mm	8.8	$299.99Amazon

#ad Prices come from Amazon and change. How this site is funded. Scores are our published rubric — how we evaluate.

The short answer

Most crossbows use a Weaver or Picatinny rail. Pick rings that match your tube diameter (1 inch or 30 mm) and are tall enough to clear the objective bell, set eye relief in your actual shooting position, level the reticle with the bow upright, and tighten the ring screws evenly in a cross pattern.

Mounting is not glamorous and it is where a surprising share of accuracy complaints originate. A scope mounted slightly canted, or in rings a fraction too low, or torqued unevenly, produces exactly the symptoms people blame on the bow or the bolts.

Rail types

A Weaver rail has slots at a non-standard spacing; a Picatinny rail has slots at a fixed, standardized spacing and slightly different dimensions. Picatinny rings generally fit Weaver rails; Weaver rings do not always fit Picatinny. Several bows here publish the detail — the Burris Oracle X specifies a Weaver mount, and Barnett's Hyper Whitetail includes Picatinny accessory rails.

Check your bow before ordering rings, and prefer Picatinny-compatible rings if the bow's rail is not documented.

In detail

Scopes, including three that include rings

01A 4-inch eye relief replacement scope

TRUGLO 4x32 Compact Crossbow Scope from TRUGLO

$53.75Amazon

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TRUGLO 4x32 Compact Crossbow Scope

TRUGLO

7.0/ 10

A one-piece aircraft-aluminum 4x32 with a bolt-drop-compensating reticle, nitrogen filling and weaver rings in the box. The spec worth noticing is 4 inches of eye relief: a crossbow fires forward into its own scope, and generous eye relief is how you keep the ocular off your eyebrow.

Published spec	Value
Magnification	4x
Objective	32 mm
Eye relief	4 in
Reticle	BDC / rangefinder, bolt-drop compensating
Tube	One-piece aircraft-grade aluminum, matte
Weatherproofing	Nitrogen filled, water and shock resistant
Included	Weaver-style scope rings, elastic lens caps

What it does well

4 inches of eye relief, the most generous figure published here
Rings included
Leaf-spring fingertip windage and elevation adjustments
Cheapest branded scope on the site

Where it falls short

No speed dial, so the BDC is calibrated for one assumed velocity
Fixed 4x
No illumination

Our rubric

Speed matching: 5.4
Glass: 7.0
Reticle: 6.8
Low light: 6.4
Value: 9.0

02The warranty you will never need to think about

Vortex Crossfire II 2-7x32 Crossbow Kit from Vortex

$199.00Amazon

#ad How we are funded · Price as of October 6, 2026

Vortex Crossfire II 2-7x32 Crossbow Kit

Vortex

8.6/ 10

An XBR-2 reticle built around a 40-yard zero with holdovers from 20 to 100 yards, dual red and green illumination, and the Vortex VIP warranty: unlimited, unconditional, lifetime, transferable. The kit includes 30 mm rings, flip caps and a neoprene cover, so there is nothing else to buy.

Published spec	Value
Magnification	2-7x
Objective	32 mm
Reticle	XBR-2, dual red and green illumination
Zero	40 yd
Holdover range	20-100 yd
Included	30 mm rings, flip caps, neoprene cover
Warranty	VIP unlimited lifetime, fully transferable

What it does well

The best warranty terms on this site, and transferable
The kit includes rings and caps, so the price is the whole price
A 40-yard zero puts the holdovers where crossbow shots actually happen
O-ring sealed and nitrogen purged

Where it falls short

The speed setting lives on the magnifier ring, so zoom and speed are coupled
No explicit fps range published on the listing
Second focal plane, so holdovers are only correct at one magnification

Our rubric

Speed matching: 8.0
Glass: 8.6
Reticle: 8.8
Low light: 8.4
Value: 8.6

03Short and light on a compact bow

$62.99Amazon

#ad How we are funded · Price as of October 6, 2026

CVLIFE 4x32 Compact

CVLIFE

7.4/ 10

7.7 inches and 11.3 ounces with a 250 to 350 fps speed adjustment and six aim points to 70 yards. The length is the reason it is here: on a 31-inch bullpup, a 9-inch scope hangs off both ends. Note the speed ceiling of 350 fps — this is a scope for a slower bow.

Published spec	Value
Speed range	250-350 fps
Magnification	4x
Objective	32 mm
Length	7.7 in
Weight	11.3 oz
Reticle	Six aim points with six horizontal lines, 20-70 yd
Durability	Aircraft-grade aluminum, shock tested to 800 G

What it does well

7.7 inches and 11.3 ounces suit a short, light bow
Six aim points plus ranging lines at a low price
Rings, caps and batteries included

Where it falls short

A 350 fps ceiling rules out most bows on this site
Fixed 4x
No warranty terms published

Our rubric

Speed matching: 6.4
Glass: 7.0
Reticle: 7.4
Low light: 6.8
Value: 9.0

04Calibrated aim points out to 100 yards

$159.99Amazon

#ad How we are funded · Price as of October 6, 2026

Hawke XB1 SR 1.5-5x32

Hawke

8.7/ 10

Calibrated for 250 to 425 fps with 10-yard aim points running from a 20-yard zero all the way to 100, on 11-layer multi-coated glass. The no-fault lifetime warranty is the part worth noting: Hawke repairs or replaces it regardless of how it broke, which on a crossbow — a machine that recoils forward into its own scope — is not a trivial promise.

Published spec	Value
Speed range	250-425 fps
Magnification	1.5-5x
Objective	32 mm
Aim points	20-100 yd in 10 yd steps
Reticle	XB1 SR, red and green illuminated
Glass	11-layer fully multi-coated, System H2
Warranty	No-fault lifetime repair or replace

What it does well

Aim points to 100 yards from a 20-yard zero
Red and green illumination rather than one color
No-fault lifetime warranty covers accidental damage
Fast-focus eyebell and a high-torque zoom ring

Where it falls short

250 fps floor rules out the slowest recurves
425 fps ceiling rules out the fastest bows here
A 1-inch tube rather than 30 mm

Our rubric

Speed matching: 8.8
Glass: 8.4
Reticle: 9.0
Low light: 8.2
Value: 8.8

05Fast bows, past 400 fps

$299.99Amazon

#ad How we are funded · Price as of October 6, 2026

TenPoint RangeMaster 100

TenPoint

8.8/ 10

A 2-7x36 variable that accommodates 380 to 505 fps — the only scope here whose speed range starts where most others stop. Nine illuminated aim references on an etched-glass reticle: dots at 20, 30 and 40, crosshairs at 50, 60 and 70. If you bought a 430 or 470 fps bow, most crossbow scopes cannot be dialed for it. This one can.

Published spec	Value
Speed range	380-505 fps
Magnification	2-7x
Objective	36 mm
Max calibrated range	100 yd
Reticle	Etched glass, 3 illuminated dots at 20/30/40 yd, 3 crosshairs at 50/60/70 yd
Weatherproofing	Water and fog proof
Zero procedure	Sight at 20 yd, micro-tune at 50 yd, zeroed at 100

What it does well

380-505 fps is the only range here that covers a 470 fps bow
7x at the top end is real magnification for a 100-yard hold
Etched-glass reticle stays clean in the field of view
36 mm objective gathers more light than the 24 mm competition

Where it falls short

380 fps floor excludes most bows under five hundred dollars
Most expensive non-rangefinding scope here
Magnification and the speed dial share a ring, so they are not independent

Our rubric

Speed matching: 9.0
Glass: 9.0
Reticle: 9.2
Low light: 9.0
Value: 7.4

Rings: diameter, height and what comes in the box

Scope	Tube	Rings included
TRUGLO 4x32	1 in	Yes — Weaver style
Vortex Crossfire II kit	30 mm	Yes — 30 mm rings, flip caps, cover
CVLIFE 4x32	1 in	Yes — 20 mm mount rings
Hawke XB1	1 in	Not stated
TenPoint RangeMaster 100	Not stated	Not stated

Three of five include rings. On a hundred-dollar scope, a twenty-dollar ring set is a meaningful part of the price.

Ring height

The rings have to be tall enough that the objective bell clears the rail and the bow's own hardware, and no taller. Too low and the scope will not sit; too tall and your cheek weld floats off the stock, which makes your head position inconsistent and your groups wider. A 36 mm objective — the RangeMaster — needs more height than a 24 mm one.

Setting eye relief properly

Eye relief is the distance from the ocular lens to your eye where you see the full field of view with no dark ring. TRUGLO publishes 4 in, which is the most generous figure here. Most makers do not publish it at all.

The eye-relief procedure

01
Get into your actual shooting position
Seated in a chair if you hunt from a blind. Wearing the coat you hunt in. Position changes eye relief and a bench setup can be wrong by an inch.
02
Shoulder the bow with your eyes closed
Let your head find its natural place on the stock rather than hunting for the scope.
03
Open your eyes and look
If you see a black ring, the scope is too far forward or back. Slide it in the rings until the full field appears instantly.
04
Snug the rings and re-check
Then check again at your highest magnification, where the eye box is tightest.

Leveling the reticle

With the bow upright and level — a small bubble level on the rail helps — rotate the scope until the vertical crosshair is truly vertical. A canted reticle is invisible at 20 yards and pushes your 50-yard hold off to one side, which looks like a windage problem that no amount of adjustment fixes.

Torque, which is where zeros are lost

Tighten the ring screws in a cross pattern, a little at a time, so the tube is clamped evenly all round.
Aim for even gaps on both sides of each ring. Uneven gaps mean uneven clamping.
Do not over-tighten. It can dent the tube and damage the internals.
Do not under-tighten. The scope moves on the first shot and your zero is gone.
If you have a torque driver, use the maker's figure. If not, snug is better than tight.

Scope bite, and why a crossbow is different

A rifle recoils backwards into your shoulder, which is how scope bite happens. A crossbow's limbs snap forward, which moves the whole machine away from your face — so scope bite is far less likely. What crossbows do instead is vibrate, and vibration is what works ring screws loose over a season.

Check them before each hunt, and shoot one bolt at 20 yards at the start of every trip.

Frequently asked questions

What rail do crossbow scopes mount on?

Most crossbows use a Weaver or Picatinny rail. Picatinny rings generally fit Weaver rails, but Weaver rings do not always fit Picatinny, so prefer Picatinny-compatible rings if your bow's rail is not documented. Check the bow's manual before ordering.

What ring height do I need for a crossbow scope?

Tall enough for the objective bell to clear the rail and any hardware, and no taller. Excess height lifts your cheek off the stock, which makes head position inconsistent and groups wider. A 36 mm objective needs more height than a 24 mm one.

How tight should crossbow scope rings be?

Snug and even, tightened in a cross pattern a little at a time so the tube is clamped uniformly. Over-tightening can dent the tube and damage the internals; under-tightening loses your zero on the first shot. Use the maker's torque figure if you have a driver for it.

Can a crossbow give you scope bite?

It is far less likely than on a rifle, because a crossbow's limbs snap forward and move the whole bow away from your face rather than back into it. What crossbows do is vibrate, which works ring screws loose over a season — check them before each hunt.

How do I know my crossbow scope is level?

With the bow upright and level, rotate the scope until the vertical crosshair is truly vertical — a small bubble level on the rail makes this easy. A canted reticle is invisible at 20 yards and pushes your 50-yard hold to one side, which looks like a windage fault you cannot adjust out.

Sources

Scopes

Mounting a crossbow scope

Quick picks

Rail types