Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature currently requires accessing the site using the built-in Safari browser.
Watch Out for Scammers!
We've now added a color code for all accounts. Orange accounts are new members, Blue are full members, and Green are Supporters. If you get a message about a sale from an orange account, make sure you pay attention before sending any money!
Does anybody know where to find a .675 collar for dedicated .22 AR upper?
Apparently CMMG changed their dimension to .700 and per Lothar-Walther I need a .675 to use their barrel. Thanks for any info or leads on getting one this size.
Apparently CMMG changed their dimension to .700 and per Lothar-Walther I need a .675 to use their barrel. Thanks for any info or leads on getting one this size.
To be perfectly honest I haven't put one of these together before but I thought what they're referring to would be the O.D. of the barrel shank where the chamber is. And that the collar I.D. had to be .675 and at .700 it would have too much slop. Don't know. Owned an old DPMS dedicated complete upper but it was inaccurate and traded it off quickly.
To be perfectly honest I haven't put one of these together before but I thought what they're referring to would be the O.D. of the barrel shank where the chamber is. And that the collar I.D. had to be .675 and at .700 it would have too much slop. Don't know. Owned an old DPMS dedicated complete upper but it was inaccurate and traded it off quickly.
Yes. This issue was exposed a while back when a few of us at RFC ordered 17HM2 barrels. At least that's when we discovered it anyway. I think Lothar Walther had pre-made a bunch of 22LR barrels with that dimension and put a disclaimer on their website that you needed the "older" collar. Some guys have had luck sanding down the backside to achieve the shorter dimension. Some sandpaper on a flat surface, patience and set of caliper and you'll be there in no time.
Otherwise you might call CMMG customer service and see if they'll supply one for you.
FWIW I had a LW barrel in 22LR and it shot great! I sold it to a fella here at the hide. I hope he's enjoying it.