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The ATI SMC1100 is one of those small parts that punches above its size. Its main job is to brace the connection between your magazine tube extension and the barrel so the front of your 12-gauge stays tight and rattle-free under recoil. If you have ever added an extension and felt the muzzle end flex or work loose, this is the fix that keeps everything acting like one solid unit.
Beyond locking the tube to the barrel, this clamp doubles as an accessory mount. It gives you a 1-inch diameter cradle for a weapon light or laser, so you can run a forward light setup without buying a separate rail or mount. A reversible sling swivel stud comes in the box, and you can flip it to whichever side suits your grip. That little bit of flexibility makes it just as friendly for lefties as it is for righties.
ATI molds the SMC1100 from DuPont extreme temperature glass-reinforced polymer, so it handles heat, cold, and range abuse without getting brittle. Because it is polymer rather than steel, it clamps down without chewing up your barrel finish, which is a nice touch if you care about how your gun looks after installation. Install is straightforward with basic hand tools, and a drop of thread locker on the screw is a smart move to keep things put through repeated shooting.
The SMC1100 is designed to fit all popular 12-gauge shotguns, including the Remington 870, Mossberg 500, 590, 590A1, 535, 835, and the Maverick 88. For folks running a light on a home-defense or range gun, it is a budget-friendly way to get forward accessory mounting and a sling point in one piece. Take your time snugging it down and dial in the fit, and it earns its keep as a simple, useful add-on to a tactical shotgun setup.
Its primary job is to strengthen the connection between your magazine tube extension and the barrel so the front of the shotgun stays tight and stable under recoil. It also gives you a 1-inch cradle to mount a weapon light or laser and includes a sling swivel stud. Think of it as a three-in-one part for a forward setup.
The SMC1100 is designed to fit all popular 12-gauge shotguns, including the Remington 870, Mossberg 500, 590, 590A1, 535, 835, and Maverick 88. It is meant for 12-gauge platforms specifically. Just confirm your barrel and mag tube spacing before install so you get the best fit.
Snug the clamp down firmly and add a drop of thread locker to the screw so it stays put through repeated firing. A wrap of thin friction tape or grip tape inside the light cradle helps hold a 1-inch light steady against heavy 12-gauge recoil. Taking your time with the fit makes a big difference here.
Yes. The included sling swivel stud is reversible, so you can position it on whichever side works best for the way you carry and shoulder the gun. That makes the SMC1100 an easy pick regardless of your dominant hand.
| UPC | 758152511003 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | SMC1100 |
| Caliber/Gauge | Clamp |
| Capacity | Shotgun |
| Color | Black |
| Length | 8.8500 |
| Model | |
| Product Type | Part |
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