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PTR took a different path with the VENT Spiritus 5.56i, building the whole can out of 3D-printed Inconel instead of titanium. That choice pays off where it counts. Inconel shrugs off the kind of heat that a rapid firing schedule throws at a suppressor, so this is the VENT built for the shooter who runs their 5.56 hard and does not baby it. At 6 inches long, 1.625 inches in diameter, and 15.2 ounces without the adapter, it stays compact and keeps the balance of your rifle feeling right.
The magic inside is PTR's Purposely Induced Porosity, or PIP. Instead of traditional baffles, the Spiritus uses a printed lattice structure that vents gas in a way that drops back pressure and tames blowback to the shooter's face. That matters most on short-gassed guns like the MK18, where excess gas is a real nuisance. The Diamond-Like Carbon exterior finish adds wear resistance and holds up to rough handling, and this one wears a Flat Dark Earth color if you want your can to match an FDE build.
One of the best things about the Spiritus 5.56i is that you do not have to take PTR's word for it. PEW Science ran it through independent testing and recorded a composite Suppression Rating of 37.5 on a 10.3-inch MK18 and 44.2 on a 14.5-inch M4A1, both using Federal XM193. That is strong performance for a can this short and light, and having real third-party numbers to compare against makes it a lot easier to see how it stacks up.
The rear is a 1.375×24 HUB interface, which is the industry standard, so you can swap in QD mounts from systems like KeyMo, Xeno, or ASR down the road. It ships with a 1/2×28 direct thread adapter so you can get running right out of the box. PTR rates it for 5.56×45 on barrels 10.5 inches and longer, and it also covers 5.7×28 and 4.6×30 with no barrel minimum, which makes it a handy multi-caliber performer across a few different hosts. It carries a limited full-auto rating with a cool-down between strings.
PTR specs a 10.5-inch minimum barrel for 5.56×45, which makes it a good fit for MK18-style short barrels on up through full-size carbines. For 5.7×28 and 4.6×30 there is no barrel minimum. Sticking to those guidelines helps keep the can and your rifle running the way they should.
The rear of the suppressor is a 1.375×24 HUB interface, which is the industry standard for 5.56 cans. It ships with a 1/2×28 direct thread adapter so you can run it right away, and since the HUB threading is universal, you can add a quick-detach mount from systems like KeyMo, Xeno, or ASR later. That flexibility lets you move it between hosts without much fuss.
Inconel handles extreme heat far better than titanium, so the Spiritus is PTR's pick for shooters who run demanding firing schedules on short-barreled or duty-grade 5.56 platforms. It is heavier than PTR's titanium VENT 3, but the trade is serious durability and heat resistance in a compact 6-inch package. The Diamond-Like Carbon finish adds wear resistance on top of that.
Yes. PEW Science ran it through their testing and recorded a composite Suppression Rating of 37.5 on a 10.3-inch MK18 and 44.2 on a 14.5-inch M4A1, both using Federal XM193. Having verified third-party numbers rather than just manufacturer claims gives you a real benchmark to compare it against other cans in this class.
| UPC | 810161700424 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | VS-5560102 |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Color | Flat Dark Earth |
| Model | |
| Product Type | Suppressor |
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