Master_Blaster,
Thanks for the words about the M4. Many think the laser is too much, however they change their minds when going on a debris blasting rampage with no attempt to aim.
Here is the latest rendition of the 4 point rail system. Mesa Tactical has began calling it the FCAM III (Floating Combat Accessory Mount.)
In fact part of the rail I put together is from a early rendition of the FCAM system when we were planning on extending it further out over the barrel.
Given the weight of the M4 to begin with, I'm weighing the option of moving the accessories mounted further to the rear of the weapon.
You'll notice on the FCAM III top image, it has an extended handguard assembly kind of like a SPAS. This is to move the users hand away from the placement of the rails. My goal is to provide a forearm grip with the same handling and ergonomics as the factory handguards which are superb IMO. I hate rail systems that force you to sacrifice ergonomics for utility.
The shell holder is just icing on the cake. Toss your tacstar -- I did! There is no way this can bind up the action like the Tacstar model was famous for. If Mesa makes a shell carrier for your Remington or Mossie, GET IT. I didn't like how hard it was to put the shells into the carrier, so I modified the retention tube with an exacto knife until I got the resistance where I wanted it.
As for the GG&G oversized charging handle, I like the fact that it rotates. Its knurled, so the handle doesn't slip in your knuckle joint like the factory handle. I've been experimenting with a couple different charging methods with it. One I really like is to use my left hand from under the weapon and sweep back against it. My only concern with the handles weight, and if it is changing the speed of the action any. I don't have a fine scale to measure the weight differences. I haven't noticed anything though. I really doubt you could modify the charging handle so it doesn't rotate. Even the factory one does, it just isn't as obvious until it is time for disassembly.
The oversized bolt release is one of those things that simply should of came like that from the factory. I hated that little tiny factory bastard. I could never find it.
I feel the button should of been located on the opposite side of the weapon though too. But I could see some issues arise there such as bumping it.
-Steve