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Posted: 12/28/2003 3:16:50 PM EDT
    I have a free-floated Colt HBAR-II  post-ban upper that I plan to scope and use for varmints.  It currently has a Bushy BMAS 3-rail gas block.  I never really liked the set-screw attachment anyway, just more trouble when trying to align front & rear sights/ sighting in with irons (does anybody make one that uses the taper pins?)Bushmaster's "shaved" front sight base looks good for what I plan but I don't see that they sell it separately. Does the type of gas block or the way it attaches affect accuracy to any degree?    
Link Posted: 12/29/2003 5:34:20 AM EDT

To address your question on accuracy, just look at the front sights on a space gun, you'll see that they are almost all clamp or set screw types.

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