I agree.. Sitting here looking at all 3.. The Gen2 mags are much closer to the m14 mag then the Gen1. The M14 mag will work if you cut a slot in the left side for the mag catch or lock to hold it in the lower receiver. But, the follower will not engage the bolt catch on the last round. The follower will lock the bolt open on the last round. You have to manually engage to bolt catch to get the M14 mag out. This can be solved by using a Gen1 follower that has a plunger that has to be depress to load the mag and pops out to engage the bolt catch on the last round. another notch has to be milled in the back of the M14 mag for it to work. All in All, The best thing to do is modify the Gen2 mags to accept the 450LM round. I know what needs to be done. Just don't know how to go about doing it. The vertical slots in the front of both mags are there for the 308 shoulder. They have to be removed for the straight walled 450LM . If anyone can do this..Please let me know!! I have several Gen2 mags waiting for you!!!
![Very Happy :D](./images/smilies/icon_e_biggrin.gif)
Oh!! and by the way! If you go with a DPMS which uses FN mags you will be facing the same Shoulder problem.
![Sad :(](./images/smilies/icon_e_sad.gif)