CAT NOAH

CAT NOAH SUPPRESSOR - 6 ARC AND 5.56 AR-15 SILENCER, TITANIUM OR INCONEL 718

The CAT NOAH is a 6 ARC rifle suppressor from CAT that is also rated for 5.56 NATO, making it a natural fit for 6 ARC and 5.56 AR-15 builds. It's built around CAT's Surge Bypass technology and offered in titanium or Inconel 718, both with a DLC finish and a 1.60" diameter. HUB versions measure 6.15" long, while QD versions measure 6.50". The titanium NOAH weighs 8.6 oz in HUB form and 9.8 oz in QD form, and the Inconel 718 NOAH weighs 17.5 oz (HUB) and 17.8 oz (QD).

CAT engineered the NOAH specifically for 6 ARC reconnaissance platforms, particularly rifles with barrels of 14.5" and longer. Its optimized platform is a 14.5" TSF ARC, with an optimized velocity range of 1,000 to 2,800 ft/s, and it's designed to manage the velocity and pressure of 6 ARC while maintaining minimal backpressure for sustained field use. The NOAH can also be used on 5.56 rifles, but CAT notes it isn't specifically optimized for 5.56, so suppression and gas flow may not be as finely tuned as they are on 6 ARC.

Choosing between materials comes down to weight versus hard use. The titanium NOAH is the lightweight option, and CAT dedicates it to low rates of fire, discouraging full auto or high rates of fire (more than 30 rounds per minute) except in life-threatening self-defense situations. It requires a barrel of at least 10" for 6 ARC. Titanium versions may also show excessive white sparking on first use, caused by microscopic titanium dust from the additive manufacturing process. This subsides over time but never fully disappears, particularly on short barrels, and it can't be controlled by a flash hider. The Inconel 718 NOAH is CAT's duty-focused version, able to support full auto or high rates of fire, and it runs on barrels as short as 8" in 6 ARC and 5.56 NATO. Inconel 718 also doesn't spark, which CAT recommends for anyone who wants to avoid it. Both materials use a dedicated waffle-style erosion interface at the end of the blast chamber, a sacrificial wall designed to take erosion from unburnt particulates and protect the rest of the suppressor's internals.

HUB versions ship without a mount, so you'll pair them with any HUB-compatible mount, or with CAT's TSFX QD mount (sold separately) to run on CAT 1x16LH QD muzzle devices. QD versions ship with a Spooky 1 muzzle device and also work with the CAT-compatible Noveske Pig Pen. Shoppers comparing 6 ARC options can also look at the CAT VB6, and our CAT Suppressor Buying Guide compares every model in the lineup.

CAPITOL ARMORY'S OPINION

If you're building a 6 ARC AR-15, especially a 14.5" recce-style rifle, the NOAH is built for exactly that job. It also handles 5.56, so one can covers both your 6 ARC rifle and your 5.56 carbine. Just know going in that 6 ARC is where it's truly dialed in.

The material choice is the big decision here. Titanium keeps the rifle light and balanced, which makes sense if you're carrying it and shooting at a measured pace. Inconel 718 adds weight, but it opens up shorter barrels, higher rates of fire, and zero titanium sparking, so it's the pick for hard-use rifles and SBRs.

If you're still weighing your 6 ARC options, take a look at the CAT VB6 too. It's CAT's other 6 ARC suppressor, and seeing the two side by side makes it easier to decide which one fits your rifle and how you plan to run it.

FEATURES

• Length: 6.15" (HUB), 6.50" (QD)
• Weight: Titanium 8.6 oz (HUB), 9.8 oz (QD); Inconel 718 17.5 oz (HUB), 17.8 oz (QD)
• Mount: HUB (1.375x24) or 1x16LH QD
• Caliber rating: 6 ARC, plus 5.56 NATO
• Color: Black
• Material: Titanium or Inconel 718
• Finish: DLC
• Diameter: 1.60"
• CAT Surge Bypass technology
• Optimized for 1,000 to 2,800 ft/s
• Optimized platform: 14.5" TSF ARC
• Recommended by CAT for semi-auto 6mm and 5.56 use
• Inconel 718 versions are duty-focused and able to support full auto or high rates of fire (HRF)
• Waffle-style sacrificial erosion interface at the end of the blast chamber
• QD versions ship with a Spooky 1 muzzle device
• Model: CAT/NOAH

WHAT'S INCLUDED

• CAT NOAH suppressor
• Sticker pack
• Spooky 1 muzzle device (QD versions only)

COMPATIBILITY

• Compatible Mounts (HUB Versions): Any HUB-compatible mount, CAT TSFX QD mount (sold separately)
• Compatible Muzzle Devices (QD Versions): CAT 1x16LH QD muzzle devices, Noveske Pig Pen
• QD Muzzle Device Note: Due to the blast baffle depth, we recommend only using compact muzzle devices on QD mounting solutions. Some full-size muzzle devices may not be compatible.

MEDIA

• CAT NOAH Manual

BARREL RESTRICTIONS

• 8" : 6 ARC, 5.56 NATO (Inconel 718)
• 10" : 6 ARC (Titanium)
• 5.56 NATO (Titanium): No minimum listed by CAT

AVAILABLE MODELS

• Mount: HUB, QD
• Material: Titanium, Inconel 718