The Polite Society Fortitude 5.56 HD is the heavy-duty, Inconel 625 version of the Fortitude 5.56. It keeps the same five-inch profile as the titanium model in an alloy that holds its strength through long strings and high round counts.
It runs the open 1.375×24 HUB standard, so it takes HUB mounts you may already own, and it ships with a 1/2×28 direct-thread mount. It weighs 11.5 oz.
Specifications
- Brand: Polite Society
- Model: Fortitude 5.56 HD
- UPC: 850089397023
- Caliber: .223 Rem / 5.56 NATO
- Material: Inconel 625
- Length: 5″
- Weight: 11.5 oz
- Base: 1.375×24 HUB
- Mount: 1/2×28 direct thread (included)
Ships to a licensed FFL dealer for transfer. The buyer must pass the required background check and meet all federal, state and local laws.







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