12-01-2014, 10:05 AM
I would also suggest orienting the work vertically so you don't bias the cutting based on gravity away from the BCG tunnel.
A good way to go is to get undersized uppers in the tunnel opening, with machined square faces as part of the process, then anodize, then thermo-fit the barrel extension into them.
For barrels, the extensions need to be held to certain QC specs, trued and squared, with a barrel made by someone who can keep the bore concentric to the OD.
A good way to go is to get undersized uppers in the tunnel opening, with machined square faces as part of the process, then anodize, then thermo-fit the barrel extension into them.
For barrels, the extensions need to be held to certain QC specs, trued and squared, with a barrel made by someone who can keep the bore concentric to the OD.
NRA Basic, Pistol, Rifle, Shotgun, RSO
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com