Upper Build Question

• 14.5" middy barrel with pinned comp to get to 16" (Daniel Defense with 1.5 Battlecomp)
• pinned FSB (included with barrel)
• free float single piece handguard (YHM Lightweight mid length)

• Remove FSB
• Remove delta ring assembly
• Attach barrel with barrel nut that came with the handguard (torque properly and ensure alignment)
• Attach handguard
• Re-attach FSB and pin
• Attach comp
• Take the whole upper to a professional to pin/weld
• Resist urge to put the upper on the lower before pinning is done

jimbobborg said:

You may have problems removing the flash hider, as in you'll have to destroy it and maybe damage the barrel. I'd suggest you get a different upper if you want a free float barreled upper.

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BradMacc82 said:

He's talking about installing the rail before getting it pinned/welded.

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jonnyl said:

I have an end goal in mind, and want to verify that it's viable and that I have the steps in the right order. Thanks for any feedback.

Goals:

• 14.5" middy barrel with pinned comp to get to 16" (Daniel Defense with 1.5 Battlecomp)
• pinned FSB (included with barrel)
• free float single piece handguard (YHM Lightweight mid length)

Are these the right steps:

• Remove FSB
• Remove delta ring assembly
• Attach barrel with barrel nut that came with the handguard (torque properly and ensure alignment)
• Attach handguard
• Re-attach FSB and pin
• Attach comp
• Take the whole upper to a professional to pin/weld
• Resist urge to put the upper on the lower before pinning is done

I built my only other upper, and it went very smoothly. My only concern here is that if I miss something I'm kinda stuck after the comp is pinned, and I can't really do any testing until after the pinning.


If it's totally idiotic to use a one piece handguard in this application just let me know



I'm not really against a 16" barrel, but the the 14.5 is a little more evil for my o'malley tribute rifle...

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photoracer said:

If you want something that can come off without trying to unweld the FH or comp I suggest chucking the FSB and get a YHM clamp on gas block w/ flip front sight. That is how I built mine. I built mine from scratch with pieces. I used a Samson Evolution carbine length free float handguard because I had one in my parts. I prefer the Samson or Troy to the YHM modular handguard.
My goal was to make everything able to come off the upper inspite of the welded on FH (I used a PSA Pigsticker Comp because it already has the hole drilled for the pin to be welded in). I was going to use a YHM Phantom QD 5.56 FH just so I could suppress it later but decided to save that for a later 11.5" barrel build.

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clandestine said:

Clamp On FSBs are a bad shortcut. Very unreliable.

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