Description
The Carlson's 54413 is a flush-mount Improved Cylinder choke tube built specifically for Browning Invector-Plus 20 gauge shotguns. It sits clean inside the muzzle with no extension sticking out, which keeps the profile of your gun tidy while still upgrading how it patterns. Carlson's cuts these from 17-4 heat-treated stainless steel, and that harder material lets them hold tighter tolerances than a lot of factory tubes, giving you a more even, predictable spread shot after shot.
Where the 54413 Improved Cylinder Earns Its Keep
Improved Cylinder is the sweet spot for anyone spending time in thick cover or over decoys. It throws a wide, forgiving pattern that works best inside 25 to 35 yards, which lines up perfectly with quail, grouse, woodcock, early-season pheasant, and rabbits that flush close. It's also a favorite on the sporting clays course and for skeet, where fast, close targets reward a bit of extra room for error. If you shoot quick and reactive, this is the constriction that covers your misses.
Shot Types the Carlson's 54413 Handles
This tube is marked and rated for steel, lead, and Hevi-Shot, so you're not locked into one type of load. Keep in mind that steel tends to pattern tighter than lead through the same constriction, so an IC running steel will often behave closer to a Modified. It's worth spending an afternoon at the pattern board with the loads you actually hunt to see exactly how your gun and this tube work together.
Fit and Everyday Use
The 54413 drops into any barrel marked Invector-Plus, so double check that your Browning wears that stamp before ordering, since Standard Invector and Invector-DS tubes are a different animal. Stainless construction shrugs off rust and cleans up easy, and Carlson's backs the whole line with a lifetime warranty. Wipe it down and hit the threads with a light oil now and then and it'll ride in your gun for years.
Key Specifications
- Manufacturer: Carlson's Choke Tubes
- Manufacturer Part Number: 54413
- UPC: 723189544133
- Gauge: 20 Gauge
- Constriction: Improved Cylinder
- Choke System: Browning Invector-Plus
- Mount Style: Flush Mount
- Material: 17-4 Heat-Treated Stainless Steel
- Shot Compatibility: Steel, Lead, and Hevi-Shot
- Country of Origin: Made in USA
- Warranty: Lifetime Warranty
- Shipping Weight: 0.085 lbs
What’s Included
- Carlson's 54413 Improved Cylinder flush-mount choke tube
Frequently Asked Questions
Will the Carlson's 54413 fit my Browning 20 gauge?
It fits any Browning 20 gauge barrel marked Invector-Plus. Look for the Invector Plus stamp on your barrel before ordering, because this tube does not fit Standard Invector or the newer Invector-DS systems. Those use different threads and dimensions.
What is an Improved Cylinder choke best used for?
Improved Cylinder throws an open, forgiving pattern that shines from about 25 to 35 yards. It's a go-to for upland birds like quail, grouse, and early-season pheasant, close waterfowl over decoys, and fast targets on the skeet or sporting clays range. If most of your shots come at closer range, this constriction gives you the most room for error.
Can I shoot steel shot through the 54413?
Yes, this tube is rated for steel, lead, and Hevi-Shot. Just remember that steel patterns tighter than lead through the same choke, so your Improved Cylinder may perform more like a Modified when running steel loads. Pattern testing with your actual hunting loads is the best way to know for sure.
Does this choke sit flush or stick out of the barrel?
It's a flush-mount design, so it seats fully inside the muzzle with nothing protruding. That keeps your shotgun's original lines clean and is a good pick for hunters who don't want an extended tube. You'll want a choke wrench to install and remove it.




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