How Critical are the Vent Holes on a Cut Down 550 Handguard? | SIG Sauer 556 Forum

How Critical are the Vent Holes on a Cut Down 550 Handguard?

Discussion in 'Uppers, Lowers, Barrels and Parts' started by Accomplice, May 10, 2020.

  1. Accomplice

    Accomplice Active Member

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    I’m thinking about getting a Sig 550 handguard, cutting it down and using it on a P556. Is it absolutely essential to drill those ventilation holes in it or would it be good to go with just the single forward rectangular venting at the front?
     
  2. CGRBB

    CGRBB Active Member

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    18C05824-35FE-4C3E-B550-111076E071BC.jpeg Probably not critical under regular-guy firing rates. But it’s about the look!
     
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  3. CGRBB

    CGRBB Active Member

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    Now I feel like I need to add the disclaimer that my 552-style flash hider is being modified, and therefore not currently able to assist in completing “the look”.
     
  4. Accomplice

    Accomplice Active Member

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    There’s no denying that it looks pretty damn cool with those holes drilled in it.
     
  5. shoobe01

    shoobe01 New Member

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    If anyone wants to drill holes in plastic, I strongly suggest step drills, as designed for use on sheet metal. And pretty low speed. They cut very round and quite neat holes in applications like this.
     
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  6. hooch

    hooch New Member

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    They make about as big a difference as a spoiler on a Honda
     
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  7. CGRBB

    CGRBB Active Member

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    You are likely correct. But I think that begs the question of why they bothered with them when they created the 552.

    And, if we were all into Sigs for purely practical reasons, we would have Sig Sauer AR-15s; not 550 series guns. We like these guns for more and different reasons than it just being a practical tool for us.
     
  8. Accomplice

    Accomplice Active Member

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  9. CGRBB

    CGRBB Active Member

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    Looking good. Not perforated enough though.
     
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  10. Accomplice

    Accomplice Active Member

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    The trailer park Tony Stark in me wants to try to make a set of hand guards out of the leftover front half of the 550 hand guard.
     
  11. Mr.Maim

    Mr.Maim New Member

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    Looks sweet! Do the 550 handguards have the stud that the SIG folding stock latches to on the right side?
     
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  12. Accomplice

    Accomplice Active Member

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    Thanks, yes, it’s on there.
     
  13. Accomplice

    Accomplice Active Member

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    The front half of the 550 hand guards also work (w/o retainer) and are already well ventilated.

    2BA5B3CA-BF5A-4FF6-B964-DE6E64B5434E.jpeg
     
  14. CGRBB

    CGRBB Active Member

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    Did you graft a piece on there, for the front takedown pin to interface with?
     
  15. Accomplice

    Accomplice Active Member

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    No, the bottom piece didn’t need it because it has to slide backward to be released from the upper hand guard and it’s wedged in between the receiver and gas block so snugly that it can’t budge. I had to take the gas block off to get it in there.


    227FDA0E-BB48-4F65-8852-495106D301CC.jpeg
     
  16. Accomplice

    Accomplice Active Member

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  17. CGRBB

    CGRBB Active Member

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    I see. Well that is certainly a unique handguard. Has a PE57 vibe to it. Something about the contour.
     
  18. Accomplice

    Accomplice Active Member

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    Yeah, it has a retro vibe like seeing the old slimline hand guards on an MP5. It feels good in the hand and that (bipod related?) recess acts like a concave hand stop of sorts.
     
    Last edited: May 19, 2020 at 10:03 AM

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