+- 6.5 Grendel Forum (https://65grendel.com)
+-- Forum: 6.5 GRENDEL DISCUSSION FORUMS (https://65grendel.com/forumdisplay.php?fid=3)
+--- Forum: 6.5 Grendel ARs and Other Semi-Autos (https://65grendel.com/forumdisplay.php?fid=8)
+--- Thread: Thermofit forged upper receivers (/showthread.php?tid=24451)
Thermofit forged upper receivers - Tx264 - 04-11-2022
Who makes thermofit forged upper receivers besides bcm?
Called zev.they said their zev and mega are thermo.
Asked what inside measured,said he didn't know.
Thermofit forged upper receivers - montana - 04-11-2022
Both of my BCM and Geissele Stripped Upper receivers gauge out at .9960 They are both thermal fit. JP uppers are also thermal fit..
Mill spec is 1.000 + .002
Thermofit forged upper receivers - Zeneffect - 04-18-2022
Vltor is another that comes to mind but billet not forged so probably not useful.
Thermofit forged upper receivers - SDW - 04-22-2022
^^^ Actually, if you're talking about the Vltor MUR upper, it's forged, not billet. Just made beefer/thicker. Then machined to a high standard where needed. And they're not thermal fit. I have two of them. For both, the barrels slipped in without much fuss. With one barrel I shimmed the barrel extension with brass shim stock to get a nice, tight fit. For the other it was a little too tight for shimming so I left it alone.
Thermofit forged upper receivers - Old Bob - 04-23-2022
What SDW said ^^^... I have a Vltor upper receiver on my 7.62x40WT AR. It is a beefier, thicker forged receiver. The brass deflector/bolt assist is a separate unit pinned to the receiver. Mine was also a slip-in fit with the Wilson Combat barrel. The fit was tight enough that shimming wasn't necessary. Just used a couple of drops of green Loctite.
Thermofit forged upper receivers - SDW - 04-23-2022
Wilson Combat barrel. Interesting. The barrel of mine that didn't quite take a brass-shimming was also a Wilson Combat. The one I did shim with brass was a Ballistic Advantage.
Thermofit forged upper receivers - biodsl - 04-23-2022
Pretty sure JP Enterprises also is in this category.
Edit: I just noticed that Montana mention this in post #2.
Thermofit forged upper receivers - montana - 04-28-2022
Sons Of Liberty Gun Works also has a thermal fit upper and is one of the nicest I have seen so far...
Stripped Upper receiver barrel channel gauges out at .9960
Thermofit forged upper receivers - DHD - 05-11-2022
My AA upper is definitely a thermal fit. A couple Nordic Components heavy uppers were snug but I could snatch the barrel out.
I cheat and use SS shim stock and thermal fit with the shim.