Description
This is Carlson's flush-mount improved cylinder choke built specifically for the Beretta and Benelli Mobil 20 gauge system, and it also fits the Benelli Standard and Franchi Standard series. Improved cylinder is one of the most useful constrictions you can run, opening the pattern up for fast, close targets while still holding enough shot together to reach out a bit. It cuts roughly .010 of an inch off your bore diameter, which puts it right in the sweet spot for game that flushes close and clays that come in fast.
Where This Mobil 20ga Choke Earns Its Keep
Improved cylinder shines in the 20 to 35 yard window, so this is the tube you reach for on early-season pheasant, quail, dove, grouse, and rabbits jumping out of cover. It's also a solid pick for skeet and closer sporting clays stations where a wider, more forgiving pattern helps you connect on quick crossers. If most of your shots break inside 30 yards, this constriction gives you spread without opening up so much that you're punching holes in the sky.
Built From 17-4 Stainless
Carlson's CNC machines these chokes from solid 17-4 heat-treated stainless bar stock, so they hold up to hard field use and shrug off corrosion better than cheaper tubes. The flush profile sits level with the muzzle, keeping the clean lines of your shotgun intact with nothing sticking past the barrel. The constriction is laser marked so you can confirm what's installed at a glance, which is handy when you're swapping tubes in the field.
You can run lead, steel, and Hevi-Shot through it, with the usual caution of no steel larger than #BB or loads faster than 1550 fps in chokes tighter than full. Since improved cylinder is well below that, you've got plenty of room to work. Every Carlson's tube is made in the USA and covered by a lifetime warranty, so if one ever gets damaged you send it back for a replacement. Best advice on any new choke is to pattern it on paper at 25 to 30 yards with the load you plan to shoot, since every gun and shell combo prints a little differently.
Key Specifications
- Manufacturer: Carlson's Choke Tubes
- Manufacturer Part Number: 50613
- UPC: 723189506131
- Gauge: 20 Gauge
- Constriction: Improved Cylinder
- Fit: Beretta/Benelli Mobil, Benelli Standard, Franchi Standard
- Mount Style: Flush Mount
- Material: 17-4 Heat-Treated Stainless Steel
- Bore Diameter: 0.610 in
- Approx. Constriction: .010 in
- Shot Compatibility: Lead, Steel, Hevi-Shot
- Marking: Laser-etched constriction on end
- Made In: USA
- Warranty: Lifetime
What’s Included
- (1) Carlson's Mobil 20ga Improved Cylinder Flush Choke Tube
Frequently Asked Questions
Which shotguns does this Mobil 20ga improved cylinder choke fit?
It's designed for Beretta and Benelli Mobil 20 gauge shotguns, and it also fits the Benelli Standard and Franchi Standard choke tube series. If your 20 gauge uses the Mobil thread pattern, this tube will thread right in. When in doubt, check your owner's manual or the marking on your factory tube to confirm the Mobil system.
What is improved cylinder best used for?
Improved cylinder gives you a wider, more open pattern that works great at close to medium range, roughly 20 to 35 yards. That makes it a strong choice for early-season upland birds, dove, quail, rabbits, and skeet or closer clays targets. It spreads the shot out faster than a modified or full choke, which helps on quick, close targets.
Can I shoot steel shot through this choke?
Yes, you can run lead, steel, and Hevi-Shot through it. The only real caution from Carlson's is no steel larger than #BB or loads faster than 1550 fps in chokes tighter than full, and improved cylinder is well under that limit. So you have plenty of room to shoot your standard upland and clays loads.
Does it sit flush with the barrel?
It does. This is a flush-mount tube, so it sits level with the muzzle and doesn't extend past the end of the barrel. The knurled or notched end still lets you install and remove it with a standard choke wrench.




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