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 Equ...
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