The Otter Creek Labs Infinity 556K is a severe use mid- to compact-size .243 caliber rifle silencer with an advanced but flexible hybrid design. The silencer is user-configurable for different blast load flow states and allows the operator to adapt the system to a variety of host weapons. With a high early-time flow rate, the silencer may perform well on semiautomatic platforms even in its most restrictive configuration. For sensitive platforms, the user may fully vent blast loads from multiple stages of the silencer, lowering back pressure to a minimum for this design. Unlike the larger .30 caliber Infinity silencer, the Infinity 556K produces consistent blast load propagation on 5.56 NATO weapons, in all end cap configurations, due to its more appropriate primary bore size for those platforms. The Infinity is 3D-printed from Haynes 282 alloy and is expected to offer significant durability for hard use.

In this review, the Otter Creek Labs Infinity 556K performance metrics depend upon suppressing a supersonic centerfire rifle cartridge on a commonly fielded gas-operated rifle, which is an incredibly difficult task. How would the Otter Creek Labs Infinity 556K perform on your MK18 with a 10.3-in barrel, with three of its different end caps?