183 is good. I'd be all over it. Waiting on mine to arrive tomorrow. I installed the Midwest industries low profile gas block and it fits very well and won't or shouldn't budge since it had 3 set screws on the bottom and I went a little farther and drilled three small dimples in the barrel at the screws contact points. A little blue on the threads and she ain't moving.
Keep us posted on what you decide to do and have fun doing it.
Dave
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