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Posted: 6/10/2010 6:15:08 PM EDT
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Friend gave me a birdcage style flash hider off his Sig, being one to never turn down anything gun related I took it. I was comparing it to the bird cage on my DPMS 20" barrel and noticed on the bottom of the Sig there are no slot's in the grooves at the bottom of the flash hider, whereas the DPMS has tham all the way around. Anyone know why?
Thanks, Clark |
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A1 versus A2 style flash suppressor.
Edit: The A1 has six slots distributed equadistant round the suppressor while the A2 has only 5 slots all of which are in the upper half of the suppressor. The idea was to reduce the dust signature that results from gases venting downward when the shooter was in a prone position. Prior to the A2 design, the dust thrown up by the A1 style suppressor could reveal the shooter's position. A minor side benefit is a mild compensator effect with more of the gas venting upward with the A2 design, but the major reason was to reduce the dust signature. |
| I'd venture to guess that the A1 has slightly better groups. The gas would be stabilized equally on all sides of the bullet, where as the A2 would create a pressure spike on the side with no holes. It's just a guess in my opinion. But, I wouldn't mind testing out the theory. It makes a little sense. |
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I shot national match with an AR-15 with the A1 flash suppressor in the 1990s, but have not done so with the A2 suppressor. The trend now is to not use one as the current rules allow a target crowned muzzle with no flash suppressor at all (which frankly I think works against the whole service rifle principle).
But it would be intersting to test the theory. I'll have to pick up a couple extra crush washers and shoot some groups on the bench with the same rifle and the same ammo with both styles of suppressor and see if there is any significant difference in the groups. |
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