Hi all,

I was wanting to get a permanent large to small hole conversion done on an SP1 upper.  I contacted Retro Arms Works, and was advised that they no longer do that work.  Sigh . . .

I’ve been gathering items for a 610 clone for a while.

The eccentric bushing thing is completely unsatisfactory for me and the DIY approach is a bit beyond my WECSOG level.

Any recommendations on a craftsman or shop providing that service would be appreciated.

What a lot of people don’t know about misc gun parts, you can go to any machine shop and have them help as well lol

I’ve done this numerous times for projects that I can’t find a gun specific person for. I’m sure there are a dozen shops local that can do that for you