It was for Grenades and for '03s originally . Originals have taken a set and should not be tried to be put on , they will rip . The reproductions have some give and fit both the '03 and the M1icon . They are too big to fit the carbine or the shotgun stocks , so never for them . There are three pads under the pad , so pull will be long , but it gets the thumb away from your nose . The pads were to protect the stock , not the shooter , though they do help a little.
Shooting the light , dummy M11 AT grenades is very close to a .458 in a bolt gun , a .375 in a Ruger #1 , and a 9.3 X 74R in a light weight double . No problem with the right hold , but not really fun after a few.
Have not shot the heavier dummy hand grenade / adapter combo yet . It should kick more . Also have not done a carbine yet.
Chris