Originally Posted by msup752
Inertia is cheaper. I think the M2 was $300 less than the M4 I took home. Inertia is faster but the ARGO (auto regulating gas operated) M4 is more reliable with a wider range of ammo. I've shot both and can't remember a significant difference in recoil.
Ah, thanks for the clarification.
And I saw heaven opened, and behold a white horse; and he that sat upon him was called Faithful and True, and in righteousness he doth judge and make war.