Looks good in theory - Seekins Precision Select Adjustable Gas Block

If you want to use this to adjust the gas and tune it a few times, it's great. If you want to be able to adjust it more than that (eg. Suppressed and not), it's garbage. After putting around a thousand rounds through my AR, it locks up and it's completely useless to try and adjust again. There are other solutions or there that are more reliable and cost less. If you like the idea of having the long handle attached, you'll need to Dremel the handguard so it can move freely.