We m4 & xm177

[Scottiee]

Right guys, a couple of questions for you GBBR experts! Here are my two bad boys, both or the WE variety



First question is about the XM177, it cycles considerably slower than the M4, is this normal? It's shooting 400 FPS but the bolt cycles almost on slow motion both on semi and full auto and with gas or co2.

Next question is about the M4, now I've taken the receiver apart just the once and now the upper and lower wobble! I know there is a relatively heavy ACOG on top but all the same a bit disappointed after just once splitting the receiver it's now loose! (The XM177 has been apart literally dozens of time and is still rock solid) Is this the same on your M4's guys?

Cheers!
Scott