This looks to be a stainless ring that screws into the front of the dropin. I have one and only one of these and someone made it a mule at some point. It appears that it is likely a 219b sw45k single mode dropin. Wish it had other modes, but beggars can't be picky.
Let me know if you have one or a dead dropin that I can remove one from.
I did email Sprotac several days ago and no reply.
Thanks Matt
Let me know if you have one or a dead dropin that I can remove one from.
I did email Sprotac several days ago and no reply.
Thanks Matt
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