The Rugged Obsidian45 suppressor is a modular .45 ACP can for pistols and pistol-caliber carbines, finished here in black (Rugged part no. OBS0145). Its ADAPT module lets one suppressor run in a standard 8.6-inch configuration for the most sound reduction or a short 6.7-inch configuration when a lighter, handier host matters more. Rugged Suppressors machines the baffles and the mount from 17-4 PH stainless steel barstock, and the keyed baffles index on two tabs to form a gas seal that keeps carbon from building up between baffle and tube. A non-slotted piston seals the full circumference of the bore for less gas blowback at the shooter’s face. The can is compatible with suppressor-height sights, and Rugged rates it for pistol calibers up to .45 ACP as well as subsonic .300 Blackout, .350 Legend and .450 Bushmaster on qualifying barrel lengths.

Key Specifications

• The caliber rating covers pistol calibers up to .45 ACP, and Rugged lists the Obsidian45 as Belt Fed Rated for them.
• Rifle ratings include .300 Blackout subsonic on an 8-inch barrel, and .350 Legend and .450 Bushmaster on 16-inch or longer barrels.
• Length is 8.6 inches in the standard configuration or 6.7 inches in the short configuration, switched with the ADAPT module.
• Weight is 12.8 ounces standard or 10.7 ounces short, so the short setup takes a little load off the muzzle.
• Diameter is 1.37 inches, slim enough to sit comfortably on a handgun.
• The baffles are 17-4 PH stainless steel, keyed with two indexing tabs to stay aligned.
• The tube is aluminum, which keeps the overall weight down.
• The mount is 17-4 PH stainless steel, machined from barstock like the baffles.
• The finish is black hard-coat anodizing and Cerakote, for a durable, low-glare exterior.
• It ships with a .578×28 piston, which Rugged says fits most standard .45 Auto threaded barrels.

Frequently Asked Questions

What comes in the box? The Obsidian45 suppressor, a .578×28 piston, a 45 front cap, the ADAPT module, an operator’s manual and an Obsidian logo sticker.

Does it share parts with the Obsidian9? Yes. Rugged says pistons, fixed mounts, fixed barrel spacers and 3-lug mounts are interchangeable between the Obsidian9 and the Obsidian45, and its non-slotted pistons are cross compatible with SilencerCo slotted pistons.

Do I need ATF approval to buy this? No. As of October 9, 2026, ATF no longer requires Form 4 approval, registration or a tax stamp for suppressors. It transfers on a Form 4473 with a background check through a Class 3 (SOT) dealer. State and local laws still apply.

Buy the Rugged Obsidian45 .45 ACP Modular Suppressor, Black

As of October 9, 2026, this suppressor transfers on a Form 4473 with a background check at your Class 3 (SOT) dealer, with no Form 4 or tax stamp; state and local laws still apply. Order through Rugged Suppressors’ suppressor lineup and our Lubbock, Texas team will handle the transfer.