A while back I was trying to decide between a 10.3", 11.5" and 12.5" The primary purpose was as a suppressed HD gun. I went with the 10.3" for shortest OAL. And I figured I would eventually build up a 12.5" anyway.

So the 12.5" rolling toward completion. There are a few outstanding items and I was hoping you might share some thoughts on how (and why) you would finish it out. Keep in mind that I want this to be a general purpose rifle.

The basics: DD A4 upper receiver, DD 10" Lite, DD 12.5" CHF barrel

Needs:

BCG
I have thought about using the DD BCG out of my 10.3" and replacing that with a Fail Zero BCG (since it's suppressed and gets very dirty). I don't think you'll see me lugging that brick through a carbine course, so I'm not sure it's completely necessary. Should I go for it to be on the safe side, or do you think I should just go with another normal BCG and leave the 10.3" alone? The cost isn't really an issue, but if it's unnecessary I could use the money on ammo.

Flash supressor/compensator
I have no plan to suppress this one, so I thought I might give try a Battle Comp. Currently I have a simple birdcage FH. Unfortunately I haven't had the opportunity to try one out, and I don't know anyone around me who has one. I've watched adn read multiple reviews, and my curiosity has it on my list. I also gave some thought to the AAC hybrid FH/Comp, in case I decided to attach my M4-2000. I have a brake on my 16" and I'm not sure if I want to go that route.

Optic
I have a set of KAC micros and I'm looking for an optic. I currently have a 1.25-4x TR21 on my 16", and a T-1 on my 10.3". My thought was to simply use the T-1 on the 12.5" when I go to the range. After getting the irons set, I could make a simple adjustment to the T-1 to get the zero. I could simply reverse the operation when putting it back on the 10.3". A dedicated optic will be in the plan shortly. Cost won't be a killer because I'm willing to be patient on the funds.

Red Dot
I like the T-1/H-1 quite well and the only other RDS that I've used was one of the older bulky EOTechs. And at that point in my shooting experience, I'm not sure I was able to properly assess it. My recollection (flawed as it might be) would lead me to another T-1/H-1. Any need to consider something other than the T-1/H-1? I am kind of curious about the smaller EOTechs and the Aimpoint Pro? I do like the notion of a smaller reticle.

1-4x variable
First of all, what do you think about putting a 1-4x on the 12.5"? Since I was going for a general purpose rifle, having some magnification for distances out to 100m+ seems to be appropriate. I'm not thrilled with the TR21 on my 16". The triangle post reticle... eh, let's just say that after using it for a while, it just isn't for me. I may be in the market to replace that optic as well, so this may be a good time to test a replacement.