I have a 6920 that I’m keeping as KISS as possible–so kiss in fact that it is stock except I’m running a Vickers sling. Here are observations:
*The A2 grip really leaves something to be desired. It is far too thin for my hands (throws my index finger contacting the trigger on the second pad) and could benefit from texture. I have MIAD grips on a few of my other builds and it seems to take care of both issues.
*The hand guards are comfortable, but aren’t long enough to feel natural and transition from target to target quickly—it feels as if I should be gripping the rifle under the front sight base. A DD FSP-style quad rail would give more versatility.
*The standard trigger guard leaves a gap that can rub your finger raw when shooting without gloves. In my hot and humid environment you get drenched with sweat and it reaps havock on the middle finger. Installation of a Magpul enhanced trigger guard would solve this.
*In low light, I can’t see the sights. It is also somewhat slower for me to transition from target to target using the sights. A red-dot sight would cure this problem. I have an Aimpoint M2 on another carbine and am faster and more confident with it, though I’ve come to want a T1 after handling guns with them installed.
*If you can’t see what you’re shooting you shouldn’t be shooting it. Therefore, seeing your sights (or using the red-dot) is useless if you can’t light up the target. I’m rarely going to need to do this, so I’m going to cheap out and mount a Surefire G2.
*The carry-handle is a good sight, however it leaves no room for mounting an optic. The LMT sight would retain the characteristics of the standard carry-handle yet allow a co-witness with a red-dot.
Keeping this in mind, here is what my next build is going to be:
-BCM 16" middy upper
-Sun Devil lower
-BCM carbine stock kit with standard carbine stock
-MIAD grip
-BCM F/A BCG
-Magpul enhanced trigger guard
-LMT adjusdtable rear-sight
-Daniel Defense Omega Rail or Lite Rail FSPM
-Aimpoint T1
-Vickers sling
-Surefire G2
And the real necessary accessories:
Extra bolt, extra extractor kit, extra springs, extra firing pin, etc.
Moral of the story—I can keep it as simple as possible and it doesn’t necessarily meet my needs, which aren’t the same as your needs, which aren’t the same as anybody else’s needs. When you find something that doesn’t work for you, change that with a solution that will.