I just ordered a 14.5" BCM midlength lightweight upper receiver with the pinned FSC 556 compensator. This is only my second rifle build and would like some advice. What are your thoughts on rails for the upper? I was thinking of doing one of the following options:
1. Install a 9" DD Omega that I already own.
2. Install a 9" DD Lite rail
3. Install a 12" DD Lite rail
I like the idea of maintaining the factory front sight base, and a lot of people on this forum seem to prefer it for durability. I plan on adding an Aimpoint T1 at a later date with the 1/3 co-witness mount. What is the weight difference of the stock fsb vs. longer 12" handguards with low profile gas block and flip up sight? Would the weight difference be negligible? I am somewhat concerned about the weight as I would like to keep the rifle as light as possible, but I am more concerned with maintaining a well balanced weapon. I really like the monolithic style and look of the DD lite rail, but am concerned with having to remove the fsb, pinned compensator, and handguard barrel nut.
The lower reciever I will be mounting this on is a BCM lower with a UBR stock.


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