The Otter Creek Labs Infinity 556K is a 5.56 NATO rated rifle suppressor built on the success of the Infinity 7.62. It delivers low back pressure, low signature, and excellent sound performance across barrel lengths from short to full-length AR and AK platforms. It is also rated for 6mm.

The Infinity's standout feature is its adjustable end cap system — swap caps to tune back pressure for everything from bolt actions to over-gassed semi-autos. Ships with the medium back pressure end cap; low and high back pressure caps available separately.

Printed in Haynes 282 for exceptional high-temperature durability. Backed by a lifetime warranty.

Specs:

Caliber: 5.56mm (6mm rated)

Length: 5.5" (no mount)

Weight: 13 oz (no mount)

Diameter: 1.75"

Material: Haynes 282

Rear Thread Pattern: 1.375x24 HUB / Bravo

Warranty: Lifetime

Transfer options for Washington residents. Form 4 transfer, our default: we register the suppressor to you with ATF at $0 tax, and after approval you may lawfully use it in Washington. Form 4473 transfer, unregistered: no registration now or later; lawful to possess but not to use in Washington (RCW 9.41.250); treated as contraband if federal enforcement resumes; requires a federal background check through the Washington State Patrol, which does not register the suppressor.