Armaspec buffer - Armaspec Sound Mitigation Buffer 158

This is a nice way to kill "AR sproing" and also good for 9mm ARs as it is slightly longer than usual so you don't break your bolt catches. Here is a list of which one you should buy from another website

SMB-Carbine, SMB-H, SMB-H2, SMB-9, SMB-H3, SMB-308

SMB-Carbine Equivalent to a standard 3oz carbine buffer

SMB-H Equivalent to an H 3.8oz buffer

SMB-H2 Equivalent to an H2 4.6oz buffer

SMB-H3 Equivalent to an H3 5.4oz buffer

SMB-308 Equivalent to a 5.7oz 308 buffer and the correct length to allow for proper over travel when used with large platform (.308, 6.5 Creedmoor, etc.)

SMB-9 Equivalent to a 9mm / PCC buffer which is typically around 6.2oz and is also extended to prevent excessive over travel when using PCC bolt carrier groups