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Posted: 1/22/2009 5:10:39 AM EDT
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Hey guys,
I picked up my lower reciever about a week ago and have most of the parts on order or they are ready to be picked up. The only issue I have encountered is with the gas block, gas tube, and quad rail...how do i know which of these parts will fit my 16" barrel? I have noticed that there are several different lengths for all of these parts. Thanks in advance for any input, |
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Is it a midlength? Rifle length? Carbine length?
If your 16" barrel has a standard carbine length gas port, you will need a carbine length gas tube. The gas block depends on the diameter/width of your barrel. I'm sure somebody can give you specifics about which size gas block certain diameter barrels use, but a lightweight barrel will use a smaller diameter gas block and a heavier barrel will require a larger sized gas block. You need to figure out exactly what profile your barrel is. If you are using the standard front sight base (big triangle shaped front sight) a 7 inch rail system, also referred to as carbine length, will fit. There are other length rails that will extend around your front sight base, giving you extra rail space, but 7 inches is the basic length for a carbine. |
Welcome to the site. 
This thread may be able to help you answer some questions about proper gas tube length: http://www.ar15.com/forums/topic.html?b=3&f=4&t=409950 |
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