Shockwave Raptor (14" Mossberg)

[wiseanon]

Say, If one were to add 1" of rifling to the end of the barrel, could you then change the pistol grip?

 

[Fatal_Bert]

Say, If one were to add 1" of rifling to the end of the barrel, could you then change the pistol grip?

Not sure where you're going with that but no. Rifling has nothing to do with it.