Unless the knife can be bent in half easily, no, but check your local site.
There is not best pistol, 1911's don't hold a lot of gas, I don't know about the others you listed. TM make great pistols, but there pastic and some don't like green gas. WE are metal but less gas efficient, OK on green gas, some guns are not that good, most are TM clones. Consider hi-capa, glock 17/18 etc etc
No sniper rifle (or dmr) is that good out of the box, they usually require £100 to £300 (approx) in mods
Hope that gives you a good idea