The Rugged Suppressors Obsidian45 is a modular .45 ACP suppressor for pistols and pistol-caliber carbines, finished here in FDE (Rugged Suppressors part no. OBSFDE45). Its ADAPT module gives two lengths in one suppressor, 8.6 inches in the standard setup and 6.7 inches in the short setup. The tube is aluminum with 17-4PH stainless steel baffles and a stainless mount, and a .578×28 piston is included for most standard .45 Auto threaded barrels. Rugged rates it Belt Fed Rated for pistol calibers up to .45 ACP, with additional rifle-caliber ratings. It suits a range pistol, a .45 carbine or a home-defense setup.

Key Specifications

• The primary rating is Belt Fed Rated for pistol calibers up to .45 ACP, which covers sustained fire from a pistol or carbine.
• It is also rated for .300 BLK subsonic with an 8-inch barrel, which adds a rifle-caliber option on short platforms.
• It is rated for .350 Legend with a 16-inch barrel or longer, for hunting-style rifles in that cartridge.
• It is rated for .450 Bushmaster with a 16-inch barrel or longer, a big-bore option on a full-length barrel.
• Standard configuration length is 8.6 inches, the longer setup for the most sound reduction.
• Short configuration length is 6.7 inches, a handier length for compact hosts.
• Standard configuration weight is 12.8 ounces, a manageable load on the muzzle of a pistol.
• Short configuration weight is 10.7 ounces, lighter for carry and handling.
• Body diameter is 1.37 inches, a size shared across the Obsidian family so its accessories interchange.
• Construction is an aluminum tube with 17-4PH stainless baffles and a stainless mount, so the parts that take the blast are steel.

Frequently Asked Questions

Which thread does the Obsidian45 include? It includes a .578×28 piston that fits most standard .45 Auto threaded barrels.

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.

What else is in the box? The box adds a .45 front cap, the ADAPT module, the operator manual and an Obsidian sticker.

Buy the Rugged Suppressors Obsidian45 .45 ACP Modular Pistol Suppressor, FDE

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‘s suppressors and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer, and it ships fast to your Class 3 dealer.