10-10-2019, 03:40 AM
ArmaLite Inc. (Mark Westrom ArmaLite-formerly Eagle Arms) and LMT even made 5.56 AR15 bolts with balanced lug designs to relieve asymmetric loading on the lug opposite of the extractor before Grendel was even born.
The TDP calls for a square receiver face on the AR15. I might have mentioned it already but anodizing after machining is the culprit for out-of-square receiver faces most of the time. You would really have to louse up the machining process to cut the face out-of-square, since a lot of shops do the boring of the bolt carrier raceway and extension tunnel plus face in the same operation for optimum tool time.
The TDP calls for a square receiver face on the AR15. I might have mentioned it already but anodizing after machining is the culprit for out-of-square receiver faces most of the time. You would really have to louse up the machining process to cut the face out-of-square, since a lot of shops do the boring of the bolt carrier raceway and extension tunnel plus face in the same operation for optimum tool time.
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