I had an HK 91 for years , i still have a 93 , but over all the M14 is better than any of them.
I had an LAR in the 80s ,and it is a good rifle but it is not an M14 , You cant compare an M1A to an LRB ,Fulton or Smith Enterprise unless it is pre Illinois.
Heavy ?? so , it isn't anymore heavy than a 91 depending what you have on it.
Walnut stock thick at the rear ,steel but plate ,it and the Garand have a long history of bashing heads.
Get one of the 12in Bayonets and its weight will drive that through a piece of 3/4in plywood ,and any Kevlar vest.
To say the Garand announces itself being empty you must have never had one in Boot Camp.
Many a Marine carried a spare empty clip and when in a fire fight they would take it out and cling it up against the rifle butt.
Many a Jap ,Nazi , Chi Com etc , came out of behind their cover to find out they were tricked then dead.
Try bashing heads with an FN ,or any other rifle other than the M1 rifles or the bolt actions and you just broke off your stock.
The steel butt plate used on an enemy coming up behind you will crush every bone in their face , Marines say it was the ultimate fighting rifle where both ends were deadly.