Kaw Valley Precision Thread Adapter 13.5x1 LH to 1/2x28 Threads per Inch Black Small. KVP thread adapters are the best choice for converting your current barrel thread to a standard thread. Allow yourself the flexibility to attach your favorite muzzle device/suppressor to multiple weapon platforms Our adapters covert BARREL thread pitches"to" desired MUZZLE device thread pitchs. For example 1/2x28 (barrel thread) to 1/2x36 (muzzle device/suppressor thread) converts a barrel threaded 1/2x28 to 1/2x36 for installation of corresponding muzzle devices or suppressors.NOTE: ADPT-1311 (.578x28 to 5/8x24) can be used in .45 ACP applications Specifications for Kaw Valley Precision Thread Adapter: Manufacturer: Kaw Valley Precision Color: Black Weight: 0.1 lb Features of Kaw Valley Precision Thread Adapter Not Intended for applications larger than 9mm diameter projectiles. Package Contents: Kaw Valley Precision Thread Adapter Kaw Valley Precision KVP-ADPT-1312: Thread Adapter 13.5x1 LH to 1/2x28 Threads per Inch Black Small