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Carlson's rifled choke tube is a simple upgrade for anyone who wants better slug accuracy out of a smoothbore 12-gauge without buying a dedicated slug barrel. It threads into Winchester Invector-pattern barrels and drops the rifling right at the muzzle, where it puts a little spin on the projectile before it leaves the gun. That extra stabilization is the whole idea, and it can noticeably tighten up your groups compared to running slugs through a plain cylinder or improved cylinder tube.
The tube is machined from 304 high-stress stainless steel with a matte black finish, so it holds up to repeated firing and the heat that comes with it. It runs a right-hand 1:35 twist with a .730 groove diameter in 12 gauge. This is an extended design, meaning it protrudes past the muzzle anywhere from roughly .625 to 1.3 inches depending on your barrel, which also helps protect your muzzle threads. Carlson's builds these in the USA and backs them with a lifetime warranty, so if anything ever goes wrong you send it back and they take care of it.
A few inches of rifling at the muzzle is not the same as a fully rifled barrel, and it's worth knowing that going in. These tubes generally do their best work with Foster-style rifled slugs rather than saboted slugs, which really want a full-length rifled bore to stabilize properly. Every shotgun has its favorite load, so plan to run a few different slug brands across paper at 50 yards to see what your gun likes best. Once you find the right pairing, this is an affordable way to squeeze more range and consistency out of a barrel you already own.
This fitment covers a wide range of platforms beyond just Winchester, including Browning Invector, Mossberg 500, Savage and Weatherby 12-gauge choke systems. If you run a Winchester SX2, SX3, SX4 or SXP, note those use Browning Invector Plus tubes instead, so double-check your barrel before ordering.
It's cut for the Winchester Invector thread pattern, which also covers Browning Invector, Mossberg 500, Savage and Weatherby 12-gauge choke systems. Winchester SX2, SX3, SX4 and SXP barrels are the exception, as those take Browning Invector Plus tubes. When in doubt, check your barrel markings or Carlson's interchange guide before ordering.
They can tighten up your groups by adding a bit of spin to the slug at the muzzle, which helps stabilize it in flight. It won't match a fully rifled barrel since you only have a few inches of rifling to work with, but it's a real improvement over shooting slugs through a plain cylinder or improved cylinder tube. Results vary gun to gun, so testing a few loads pays off.
Stick with Foster-style rifled slugs for the best results. Sabot slugs are designed for full-length rifled barrels and tend to group poorly or even keyhole when run through a rifled choke tube on a smoothbore. If you want to shoot sabots, a dedicated rifled barrel is the way to go.
Yes. It's machined from 304 high-stress stainless steel with a matte black finish, made in the USA, and carries a lifetime warranty. If it ever gets damaged, you can send it back to Carlson's for a replacement.
| UPC | 723189400408 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 40040 |
| Caliber/Gauge | 12 Gauge |
| Chokes Included | One Choke |
| Length | 7.8500 |
| Style | Win Choke |
| Thread Pattern | INVECTOR |
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