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IWI built the IWS6 suppressor with swappable end caps for a reason. The vented cap that ships on the can keeps gas flowing and backpressure down, which is great for hard-running semi-autos and full-auto guns. But when your priority shifts to getting the quietest performance possible, this non-vented front cap is the piece you want. Closing off the front vents keeps more gas working inside the baffle stack, and that translates to better sound reduction at the muzzle.
This cap is machined from stainless steel with a black finish, matching the weapon-grade construction IWI put into the rest of the IWS6. It is rated for the same 5.56 NATO, .223 Rem, .224, and 6mm cartridges as the suppressor itself, so there is no compromise on what you can shoot through it. Bolt gun guys chasing a quieter range session and precision rifle owners running 6mm cartridges will get the most out of the sealed configuration, since those platforms are not as sensitive to the added backpressure a closed cap brings.
The changeover is about as simple as it gets. Unscrew the vented cap, thread this one on, and confirm your zero before getting back to work. Keeping both caps in your kit means one suppressor can cover two very different jobs: run vented when you want your gas gun cycling smooth and clean, then go sealed when sound reduction is the mission. At just about an ounce, tossing the spare cap in a range bag costs you nothing.
If you picked up an IWS6 and have been wondering whether the closed cap is worth adding, this is the factory part made for exactly that. Direct fit, same materials, no guesswork.
No, the IWS6 ships from the factory with the vented cap installed, which is set up for maximum gas flow and reduced backpressure. The closed non-vented cap is sold separately, and this is that part. Adding it gives you both configurations for one suppressor.
A non-vented cap seals off the front of the suppressor so more gas stays trapped in the baffle stack, which improves sound reduction. The trade-off is more backpressure, which matters more on semi-auto gas guns than bolt actions. Many owners run vented on their AR and swap to this cap for bolt guns or any time quiet is the top priority.
It carries the same rating as the IWS6 suppressor, covering .223 Rem, 5.56 NATO, .224, and 6mm cartridges. That makes it a solid fit for everything from a 5.56 carbine to a 6mm Creedmoor precision rifle. Anything larger than 6mm is a no-go through this cap.
It is smart practice to confirm your zero any time you change anything on the front of a suppressor. Point of impact shifts from a cap swap are typically small, but precision work demands verification. Fire a quick group after installing and adjust if needed.
| UPC | 818004025345 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | IWSNVECSS6 |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Color | Black |
| Model | |
| Product Type | Front End Cap |
| Shipping Weight | 0.064 |
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