Hmmm thats an idea. I can pair my HS upper and try a super light build.

 

Well maybe not super light.

 

How heavy are the troy 2 piece rails?

To install my 15" VTAC rail I cut down the FSB on my brand new MP15. Why replace it with a low pro? Little work with a dremel and some cold blue and its as good as new.

Don't they make rail-mounted front sight posts?

If I wanted the lightest possible free float handguards and KEEP my front sight base, what would you all suggest? 

 

checko, The Centurion C4 cut out rail is a two piece free float rail that I like very much.   I have used two of these mid-length versions.  They require removal of the Delta ring which can be cut off if your careful while it is still assembled to the upper receiver or you can remove the barrel and save the Delta ring and spring for another build. Also the handguard cap needs to be removed, I use tin snips to do this. It attaches to the factory barrel nut and you do not need to remove the FSB or your pinned brake.  If you need to borrow the tools I have them.

 

 

Here is a pick of the carbine versions, with and without FSB cutout.

 

 

 

Here it is on my old middy upper.

 

 

Picture of it apart

 

checko, The Centurion C4 cut out rail is a two piece free float rail that I like very much. I have used two of these mid-length versions. They require removal of the Delta ring which can be cut off if your careful while it is still assembled to the upper receiver or you can remove the barrel and save the Delta ring and spring for another build. Also the handguard cap needs to be removed, I use tin snips to do this. It attaches to the factory barrel nut and you do not need to remove the FSB or your pinned brake. If you need to borrow the tools I have them.

 

 

Here is a pick of the carbine versions, with and without FSB cutout.

 

 

 

Here it is on my old middy upper.

 

 

Picture of it apart

 

How's the weight compared to a magpul setup?

Magpul carbine HG weight is 6.85 oz

 

Centurion 7" C4 carbine HG weight is 8.5 oz

 

Centurion C4 Carbine cutout HG weight is 10.5 oz

 

Remember to subtract approx 1.1 oz when you install one of the C4 rails because of the HG cap and Delta ring and spring removal.

The C4 rail is nice (I stock those as well as CMRs) if you're looking for a traditional quad rail setup.  My gripe is primarily weight related but the lock up to the receiver is solid.  Fortis and Mega's MKM have spoiled me.

I know HE doesn't like removing the pinned front sight base, but I think he should really try it

 

There a bunch of two piece gas blocks or gasblock/frontsight combos out there that are quite solid and it solves a LOT of the NJ related headaches. Some of them include center screw that can be torqued down inside a barrel dimple, basically acting as a cross pin.  I'm sure that properly abused and neglected the two piece gas block will fail before one piece but then again we all prefer two piece scope mounts then integrated scope mounts so maybe we can start accepting the helical screw as an actual thing that works