[x.shell]

Originally Posted by ocN55

I'm thinking of purchasing H&R supersports that came off an M4, would they not be compatible with my M3? Or is it merely a difference in part #?

http://www.hrsprings.com/application...ts/4/1683/2015
http://www.hrsprings.com/application...ts/4/1686/2015

Looks like the part# is identical for the super sports, but different for the sports.

I'm not positive about H&R part numbers but my guess is that they should have separate part numbers.