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** 5/8x24 adapter The KVP MACH Modular linear comp thread adapters allow users to use their MACH linear comp on various firearms with different thread pitches. The thread adapters can also be used as Direct thread adapters for various suppressors on the market. The MACH linear comp system utilizes a 1-1/8x28TPI OD thread, that is common in many suppressors.MACH Thread Adapter Features: