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Posted: 9/12/2006 11:04:59 AM EDT
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Am I missing something (no pun intended) or maybe I just see things different. All these short barrel rifles like the m4, car, etc. have a short forearm. The front sight is just past the forearm and then you have 6 – 8 “ of barrel past that. I guess the reason for this is to allow for a bayonet attachment. We all know a longer sight radius helps eliminate aiming error and I thought I heard there are problems sometimes with short cycling due to the gas tube being shorter. Would it not be better to use a standard forearm and keep the longer sight radius and gas tube? Thinking about it all you would have to do make a compact weapon is take a standard A2 put on a collapsible butt stock, whack off the barrel ahead of the front sight leaving enough to re-crown and thread for a new break/flash hider. Yes you loose the ability to attach a bayonet but when was the last time the US Military had a bayonet charge? |
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Ideally, you need about 5 inches of barrel past the gas block to allow enough time for gas to return down the gas tube to function the action. You could put the front sight at the end of the barrel, but the gas block needs to be further back for proper function. The Bushmaster Dissipator does something related to what you have suggested, but it still must employ a carbine length gas system for functionality. |
Some people have got it to work by drilling out the gas port. To me it's a hack modification, and not acceptable. |
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