09-10-2017, 05:24 PM
(This post was last modified: 09-10-2017, 05:27 PM by The Profit Joseph Sith.)
LRRPF52 Wrote:My DPMS LR-260 bolt lugs are .313"-.315" long.
AR15 Grendel bolt lugs I just measured are .280" on my AA hard use bolt.
Looks like your calipers aren't square in your photo of the .30 RAR bolt. If you come in at an angle with the blades going across the lug, I bet it reads .280", but wither way, it's AR15-length lugs with AR10 diameter bolt, AR10 cross section bolt face, on an AR15 bolt body so it fits in the AR15 carrier.
I always clean my calipers with a sheet of notebook paper and "clamp" down moderately on it and pull it out of the jaws, then I slightly wiggle the jaws on the measured part to make sure it's seated square and take the lowest measurements for O.D. highest for I.D. work. Keeping in mind calipers aren't the highest accuracy. There's almost always better equipment and setups out there. Specialized calipers and such.
Interesting thread though. Thanks for info kilco. Thanks for input as always LR.
