I have a barrel of particular interest that was machined for a clamp-style receiver at 16mm. It was not machined well and this surface is wavy and inconsistent by a couple thou.

I’d like to put this barrel in my RAW which needs to be .625 (+0/-.0005) diameter. So I assume the only good solution that keeps the length is to OD grind down to .625 and hope for 90-95% cleanup. (To be clear I only want the receiver end ground - not the whole length)

Suggestions who can do this? The local machine shops might but they aren’t barrel people. Bonus if they can machine the port and chamber too.

Bought mine March of 24. Loved the operation but struggled with long term consistency. Issue was the bb spring tension on the hammer. Turns out vibration caused the grub screw to back out and thereby release the hammer adjustment to rotate any which way after every shot. It was such a simple silly thing. I added vibra tite to the grub screw instead of locktite by preference. Now assuming it holds, this fine instrument should perform flawlessly. Frankly, it’s a miracle that I shot any 1 MOA groups.

I was happy when Huma Air got the Hikmicro 4k lite in stock last month and ordered one. First thing to bring me down was $142 UPS import
brokerage fee ( tariff) I didn’t have a big problem with this though as I support the leveling out of these fees to not only burn the US.
So i received the scope , wow to feel is impressive so lite yet feeling of well built. I charged and installed second battery and went about to
load Apple app , it doesn’t let you go far immediately says not available in your country.
I went through everything I could find. Getting a UK address that Apple recognises. No WAY. I bought anew ipad with no data and also signed up for Proton VPN that was recommended here and started out with a UK address. The farthest I got was Apple requesting a confirmation phone number that had to be in the UK. Googled and there is sites that these “ numbers” can be bought. It comes with risks says google. Anyway it never allowed me back there. Huma claims to have sought help from Hikmicro but none came. So I just shipped back after opening a claim with Paypal to get full ( with original shipping ) fee back. UPS stores cheapest was $200+ for shipping only, luckily I learned of Pirateship on here and got down to $68. Its not over yet as I don’t know what fees may come when it gets to Europe.
New to this hobby 8 months ago I have at least 6 orders with Huma
They should absolutely state that this device will not work in North America