You'd be making a restricted rifle that you won't get an ATT to take shooting. If you want to play with making a marketing inspired rifle to look at and fondle at home, buy an M305. You really don't want to muck around with a $3500 rifle.
"...Short action cartridges don't lose much velocity..." 50ish to 100 fps velocity loss per inch. Depending on which study you believe. The gas system requires alteration too.
.... And then yer #### WILL fall off!Seriously, cut down a Norc, Keep the M1A the way it is! Such a shame to buy an NM only to cut it down and make it a shorty!
![]()