Description
If you shoot a Browning Invector Plus 12 gauge and want a flush-fit choke that disappears at the muzzle, this Carlson's Improved Cylinder tube is a solid pick. It threads right into your barrel as a direct swap for the factory flush chokes, and the Improved Cylinder constriction opens your pattern up nicely for the kind of close work where a wide spread pays off. Think quail, dove, grouse, early-season pheasant flushing tight in the brush, and rounds of skeet where you need to break birds fast and up close.
What the Improved Cylinder Constriction Does for You
Improved Cylinder is one of the more open chokes out there, sitting just a step tighter than a straight cylinder bore. That means the shot spreads quicker after it leaves the barrel, giving you a forgiving pattern in the roughly 20 to 30 yard window. It shines when birds bust out of cover and you have a split second to mount and swing. Worth remembering that steel patterns tighter than lead through the same choke, so if you're running steel loads your Improved Cylinder will throw more like a Modified.
Built From 17-4 PH Stainless Steel
Carlson's machines this tube from 17-4 PH heat-treated stainless steel, so it stands up to corrosion and repeated use without fussing over it. The flush design keeps everything clean at the muzzle with nothing sticking out past the barrel, which a lot of folks prefer on a field gun. You can run lead, steel, and Hevi-Shot through it, though it's smart to keep steel shot no larger than #BB in any tube tighter than full.
A Note on Fit and the Carlson's Warranty
This one is cut specifically for the Browning Invector Plus thread pattern, so double-check that your barrel is Invector Plus and not the older standard Invector before ordering, since they aren't interchangeable. Every Carlson's choke is made in the USA and comes with a lifetime warranty. If it ever gets damaged, you send it back and they replace it, plain and simple.
Key Specifications
- Manufacturer: Carlson's Choke Tubes
- Manufacturer Part Number (MPN): 59963
- UPC: 723189599638
- Gauge: 12 Gauge
- Constriction: Improved Cylinder
- Fit / Style: Browning Invector Plus
- Mount Type: Flush Mount
- Material: 17-4 PH Stainless Steel
- Shot Compatibility: Lead, Steel, and Hevi-Shot
- Country of Origin: Made in USA
- Warranty: Lifetime
- Shipping Weight: 0.105 lb
What’s Included
- One Carlson's Improved Cylinder flush-mount choke tube for Browning Invector Plus 12 gauge
Frequently Asked Questions
Will this choke fit my Browning Invector Plus barrel?
This tube is cut specifically for the Browning Invector Plus thread pattern in 12 gauge. It won't fit the older standard Invector barrels, so check your barrel markings first since the two patterns are not interchangeable. If your barrel is stamped Invector Plus, you're good to go.
What is an Improved Cylinder choke good for?
Improved Cylinder is an open choke that throws a wider pattern, making it ideal for close to mid-range shooting in the 20 to 30 yard range. It's a favorite for upland birds like quail, dove, and grouse that flush tight, and it works great for skeet. When you need a quick, forgiving spread up close, this is the tube you reach for.
Can I shoot steel shot through this choke?
Yes, you can run lead, steel, and Hevi-Shot through this Improved Cylinder tube. Just keep steel shot no larger than #BB in any choke tighter than full. Keep in mind steel tends to pattern tighter than lead, so your Improved Cylinder will act closer to a Modified with steel loads.
Does this choke need a wrench to install?
Being a flush-mount tube, it sits nearly level with the muzzle and can be snugged in with a choke wrench. A standard slotted choke wrench or your factory Browning wrench will handle it. It's smart to add a little choke lube or anti-seize to the threads and remove the tube periodically to keep it from sticking.





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