Carlson's Choke Tubes 40040 Replacement 40040 12 Gauge Rifled 304 Stainless Steel

A rifled choke tube designed for 12-gauge shotguns, the Carlson's 40040 swaps into compatible Winchester, Browning Invector, and Mossberg 500 platforms to tighten shot patterns and improve accuracy from smooth-bore barrels. Built from 304 stainless steel and finished in matte black, this replacement tube features a right-hand rifle twist at a 1-in-35 rate and a .730-inch groove diameter, giving slugs and buckshot the spin they need to group tighter downrange. Whether you're hunting with slugs or testing loads at the range, a quality rifled choke can transform your shotgun's capability.

The 40040 protrudes between .625 and 1.3 inches from the barrel depending on your specific firearm, so measure your setup before ordering to ensure proper fit. The stainless steel construction resists corrosion and handles the stresses of repeated shots without degradation, making it a durable addition to your shotgun arsenal for years of use.

Drop-in choke tubes are a cost-effective way to dial in your shotgun's performance without replacing the barrel or sending the gun to a gunsmith. If you're running slugs or heavy buckshot loads and your groups are opening up, a rifled tube like this one addresses the root cause—lack of spin—rather than just masking the symptom with different ammunition.

Key Features

• 304 stainless steel construction for corrosion resistance and durability
• Right-hand rifle twist (1-in-35) imparts spin for tighter shot patterns
• .730-inch groove diameter optimized for 12-gauge bore
• Matte black finish
• Compatible with Winchester, Browning Invector, and Mossberg 500 shotguns
• Improves accuracy and group consistency with slugs and buckshot

Specifications

Frequently Asked Questions

Will this rifled choke tube fit my shotgun?

The Carlson's 40040 is designed for Winchester, Browning Invector, and Mossberg 500 shotguns. Measure the protrusion on your barrel to confirm fit, as the tube extends between .625 and 1.3 inches depending on your specific model.

What's the difference between a rifled and smooth choke tube?

A rifled choke applies spin to the projectile as it exits the barrel, which tightens groups and improves accuracy with slugs and buckshot. A smooth choke does not. If you're shooting slugs and want tighter patterns, a rifled tube is the answer.

What shotguns use Browning Invector chokes?

Browning Invector tubes fit Browning, Winchester, and Mossberg platforms. Note that Winchester SX-2, SX-3, SX-4, and SXP models use Browning Invector Plus tubes, so verify your firearm's spec before ordering.

Is this tube suitable for hunting and range use?

Yes. The stainless steel construction and matte black finish are built to withstand regular use in the field and at the range with slugs and buckshot loads.