Just got a lightly used M4 - looks brand new - the guy said he shot maybe 200 rounds through it. I trying to familarize myself with it I find it's operation confusing. I feel pretty dumb about this but I need help in trying to understand this thing. I looked at the manual on-line and still no help. The only other semi-auto SG that I've used is a Rem model 11 where you load the shells, rack the slide and rock and roll. Not all these dang buttons to worry about.
Here are some of my questions in no real order of importance -
The M4, it seems, will not allow loading at certain times - the loading gate "locks' into closed position. I don't know why? Shouldn't you be able to top the tube off as you go?
Sometimes the slide will lock back when pulled open manually and sometimes it will cycle. Normally when a semi-auto SG is empty, doesn't it lock back like a 1911 all the time?
Sometimes with a dummy shell in the tube, I'll rack the slide and it won't load the shell. It you press the "cartridge drop lever" then a shell is popped into the carrier area? Then it will rack and load. What is the purpose of this?
Pulling back the charging handle and releasing repeatedly while fully loaded with dummy rounds doesn't produce a smooth loading operation. There seems to be a hickup about half way inside the receiver where the cartridge "pauses" before continuing to the chamber. Ejection seems fine.
So, am I doing something wrong here or is there something wrong with my M4? I got it for a good price but not if it's defective. Do you think it's ok to take it to the range and see what's what with live ammo?
Thanks in advance for any help.
John