C-9-2, October 1968, almost opposite of everyone else, we were issued brand spanking new XM16E1s, chrome bolts, three prong flash suppressors and all. Part of some kind of test (they said) as all other basic trainees we saw still had M14s. BRM with M16 was a snap, lots of guys shot expert. Bayonet training, however, broke a few butt stocks. Last week of basic we all had a couple days of training with wood stock M14s.
Fort Knox, April 1969, ANCOCC, was issued fiberglass stocked M14. Butt ugly, with a pinkish brown hue, but shot OK; no problem qualifying expert. Ours were issued without the selector, but everyone knew the "matchstick trick" to wedge the connector and sear release. Not practical with ball ammo, but fun with blanks during training exercises. The steel buttplate lets you deliver a horizontal butt stroke with conviction.
After that, aside from the random unit sniper's XM21, did not handle another M14 until 1981. At that time I was assigned as an adviser to a National Guard tank battalion in Wisconsin. The unit supply guy said they were awaiting a pair of M14s for the color guard and asked if I knew anything about them. When the box from Anniston Army Depot arrived, I helped inspect them and noted with disappointment that they had shaft locks.
A couple minutes with a pin punch and that was corrected and selectors installed. After a short discussion, the decision was made that the color guard should not be issued rifles that had not been test fired and zeroed. Securing a can of M80 ball, we load up the TMP sedan, head out to the county range to zero the rifles as prescribed in FM23-8.
Everything was going well until the young armorer asked about shooting on full auto. I gave him instructions, he followed them, no problems, until a highly irate range master comes complaining. Gesticulating wildly and pointing at the sign, which, he shrilly reads for us, "No automatic weapons except for organized military or police."
I point the the "US ARMY" over my left pocket and say, "That makes it military. I outrank him," pointing to the guardsman, "...and THAT makes it organized. So what exactly is (insert senior sergeant descriptive modifiers here) problem?"
For what it's worth, I like the M14, but, for a full size "battle rifle," I prefer the FAL. The G3 is a clever, abrupt recoiling, beast.