The Inland Monocore .45 caliber suppressor with a 5/8×24 base is an 8.5-inch aluminum monocore can from Inland Manufacturing (brand part no. M4558). The Dayton, Ohio company best known for its M1 carbines builds the Monocore around a single anodized aluminum baffle core that comes out for cleaning without special tools. This version is set up for .45 caliber with a 5/8×24 direct thread base. Inland rates the Monocore series from rimfire to .45-70, with a 1.5-inch body and a weight of about 19 ounces depending on the base. It suits a shooter who wants an easy-to-maintain .45 can for range work.

Key Specifications

• The caliber configuration is .45 caliber, and Inland rates the Monocore series from rimfire up to .45-70.
• Overall length is 8.5 inches, a full-size can for a large-bore host.
• The base is a 5/8×24 direct thread, so it screws straight onto a barrel cut in that pattern.
• Diameter is 1.5 inches, the body size Inland lists for the Monocore series.
• Weight is about 19 ounces, and Inland notes it varies with the base installed.
• The baffle is a single anodized aluminum I-Core monocore, designed to run dry or with Inland dB Foam.
• The can is self serviceable, and Inland says it needs no special tools to take down.

Frequently Asked Questions

Can I clean the Monocore myself? Yes. Inland lists it as self serviceable and says the monocore comes out for maintenance with no special tools.

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 Inland Monocore .45 Suppressor, 5/8×24

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 Inland Manufacturing‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer.