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The Carlsons magazine extension brings your Benelli M4 from a restricted 5-round capacity up to 7 total rounds in the magazine tube. This is a threaded extension that replaces your factory magazine cap, so installation is genuinely simple. No gunsmithing or permanent modifications required.
You remove the old magazine cap, unscrew the spring, and thread this extension into place. Included are a replacement spring, base clamp with swivel stud attachment point, and a high-visibility follower to keep things running smoothly. The whole job takes a few minutes if you have snap ring pliers handy to pull the retaining ring. Carlsons includes clear instructions to walk you through it.
The tube is blued solid steel that matches the traditional finish of your shotgun. It's constructed to be durable and reliable through repeated use. The blue finish won't be perfect black, but it's respectable looking and holds up to regular handling. This is a no-frills, functional piece of gear.
Keep in mind that the 7-round figure includes the round in the chamber once you're loaded up. So you'll get 6 rounds in the tube plus 1 in the chamber when fully loaded with 2-3/4" shells. It's a solid bump from the standard 5+1 setup and gives you more trigger time between reloads if you're running drills or working through a course.
Yes. This extension threads onto your factory magazine tube after you remove the original cap. It works with stock Benelli M4 shotguns. Just verify you have the right tools (snap ring pliers help) and follow the included instructions. Most shooters report straightforward installation without any modifications needed.
The extension brings your total capacity to 7 rounds when fully loaded with 2-3/4 inch shells, which includes one in the chamber. Since M4s typically come restricted to 5 rounds, you're adding 2 rounds of usable capacity in the tube. The 7-round rating includes that chamber round, so you get 6 in the magazine plus 1 in the chamber.
The tube is blued solid steel. The finish won't be a perfect mirror match to newer M4s, but it's respectable and matches reasonably well with the traditional blue on the shotgun. The extension shows it's been machined and finished well for the price, though some users prefer to have theirs painted if aesthetics are a priority.
The main thing to understand is that the factory magazine spring can take a set over time, especially when run at full capacity. Some users prefer upgrading to an aftermarket spring like a Wolff for long-term reliability, but the included spring works fine for normal use. Shell length matters too; 2-3/4 inch shells load more reliably than longer loads in the extended tube.
| UPC | 723189045081 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 04508 |
| Caliber/Gauge | 12 Gauge |
| Capacity | 7 |
| Model | |
| Shipping Weight | 0.4188 |
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