The SIGHT BEADS 146000004 – Bradley Gunsight Metric Bead 5/32" 3mm TPI (White) is a precision front shotgun sight bead designed for shooters who demand clean sight pictures, fast target acquisition, and rock-solid durability. Built in the classic Bradley “Bead-on-a-Block” style, this metric front bead is ideal as an upgrade or replacement sight for a wide variety of European and metric-threaded shotguns, from over/unders and side-by-sides to semi-auto and pump guns.
Precision Metric Bead – 5/32" 3mm TPI
This model, SIGHT BEADS 146000004, is specifically the Metric Bradley Bead, 5/32" 3mm TPI:
Thread spec: 3mm metric thread (3mm TPI)
Bead size: 5/32" Bradley bead-on-block style
Fitment: Designed for barrels tapped with 3mm metric front sight threads, commonly found on many European and imported shotguns
If your shotgun uses a metric 3mm front sight thread, this bead offers a direct, secure fit with no need for adapters or gunsmithing beyond standard removal and replacement of the original bead.
“Bead-on-a-Block” Bradley Design – Strong, Straight & Secure
Bradley Gunsight beads are known for their unique “Bead-on-a-Block” construction:
The bead is mounted on a small steel block instead of being a simple round ball on a stem
That block sits flush against the barrel, providing:
Positive indexing so the sight stays straight and aligned
Increased surface area for a stronger mounting interface
Improved durability under recoil and hard use
This design creates a robust front sight that resists bending, loosening, or shearing better than many simple screw-in beads, making it a popular choice for hard-use field guns, clays shotguns, and working bird guns.
Clean White Sight Picture for Fast Target Acquisition
The Metric Bradley beads are all white in color, giving you a crisp, high-contrast reference point at the muzzle.
Why white works so well on a front sight bead:
Excellent visibility in a wide range of lighting conditions
Pops against dark targets, timber, and brush
Easy to pick up quickly on crossing birds, upland game, or clays
Gives a clear focal point without adding glowing or distracting elements some shooters don’t want
Whether you’re shooting trap, skeet, sporting clays, ducks, doves, or upland birds, that bright white bead helps your eye lock onto the muzzle and maintain a proper sight picture.
Universal Shotgun Compatibility (Where Metric Threads Are Used)
Brownells lists this bead as fitting Universal Shotguns with the appropriate metric thread, making it suitable for many brands that use 3mm threaded front sight holes.
Common scenarios where this bead shines:
Replacing a missing or damaged front bead on a metric-threaded barrel
Upgrading from a dull or small bead to a larger, more visible white Bradley bead
Converting a plain muzzle into a more precision-oriented wing or clays gun
Matching or restoring the original style on vintage or imported shotguns equipped with Bradley-type beads
Always verify your barrel’s existing thread (or consult a gunsmith) to ensure compatibility with 3mm metric threads before installation.
Ideal for Field, Range & Competition Use
The SIGHT BEADS 146000004 Bradley Metric Bead is as at home in the field as it is on the range:
Hunting: Ducks, geese, doves, pheasants, quail, and other upland birds
Clays: Trap, skeet, and sporting clays where a clear front reference is vital
Working guns: Farm shotguns, guide guns, or rental range guns that need rugged, reliable front sights
Its robust construction and bright white bead help you mount the gun consistently, focus on the target, and break more birds without worrying about the sight giving up under hard use.
Durable Construction for Long Service Life
Bradley-style beads are built for longevity:
Steel block base for strength at the mounting point
Precision-machined metric threads that seat squarely in the barrel
Quality finish designed to stand up to regular cleaning and field conditions
Install it once, and with proper maintenance, it’s the kind of front sight bead you can rely on season after season.
Key Specifications – SIGHT BEADS 146000004
From manufacturer and distributor documentation:
Product Name: SIGHT BEADS – Bradley Gunsight Metric Bead
Manufacturer Style: Metric Bradley Style Beads
Part Number / SKU: 146000004
Thread Size: 3mm metric (3mm TPI)
Bead Size: 5/32" Metric Bead
Color: White
Construction: Bradley “Bead-on-a-Block” front sight bead on a steel block
Intended Use: Front shotgun sight bead replacement/upgrade
Compatibility: Universal shotgun applications with 3mm threaded front sight holes (metric)
Why Choose the Bradley Metric SIGHT BEADS 146000004?
Choose the SIGHT BEADS 146000004 – Bradley Gunsight Metric Bead 5/32" 3mm TPI (White) if you want:
A high-visibility white front sight bead for faster target acquisition
The strength and alignment benefits of a Bradley “Bead-on-a-Block” design
A direct-fit metric 3mm threaded bead for European and imported shotguns
A durable, clean-looking upgrade for hunting guns, clay guns, or all-purpose shotguns
For shooters who care about clarity, durability, and precise alignment at the front sight, this Bradley metric bead is a simple, affordable upgrade that can make a real difference in how quickly and confidently you get on target.
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