The Otter Creek Labs Infinity 556K takes the proven DNA of the full-size Infinity 762 and packs it into a shorter, lighter 5.56 can built for hard-use rifles. It runs across AR-15s, AK hosts, bolt guns, and SBRs without turning your rifle into a brick or causing reliability issues, and the swappable end cap system means you can tune the backpressure instead of living with the factory default.
Features & Benefits
- Additively manufactured Haynes 282 superalloy body built for punishing firing schedules
- Compact 5.5 inch, 14.5 oz footprint that keeps short builds handy
- Rated for 5.56 NATO and 6mm hosts
- Interchangeable back pressure end caps: medium installed, low and high available separately
- HUB 1.375×24 rear thread pattern works with Bravo and most QD mounts on the market
- Lifetime warranty, with an Elite Package that adds all three end caps, a Rearden Atlas mount, and a Rearden SPB brake







