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Old 07-27-2012, 04:37 AM   #1
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Default New to the AR world...

So about a year ago I made a deal with a buddy for an AR (in pieces). I did some work for him and got a barrel, complete upper, stock and the guts for the lower. Anyway, I picked up a lower and put it all together and everything works great.

Now, my question is about the gas tube coming out of the barrel. My AR has a standard hand guard on it, approx. 9". Well, I just did a trade with another guy and got a grip pod and he threw in a couple other things. One of which is a longer quad rail. Here's my question.... Since this new quad rail goes past where the gas tube exits the barrel, am I even going to be able to use it? Is there any part that I can use to keep the barrel and gas tube in it's original position and still use the quad rail? After all, it was free so I'd like to use it.

Thanks in advance!
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Walther P22 (wifes x-mas present, personalized with "momma's peace keeper")
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Old 07-27-2012, 04:44 AM   #2
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Well you've got to give more specifics and pictures would be good. But if you're talking about a standard FSB, they can be cut down and still function as a lo-pro gas block with a longer free float rail. Again, that's just a generality, depends on what you've got.
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Old 07-27-2012, 04:45 AM   #3
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By standard hand guards do you mean the plastic two piece? if so and you are planning one changing to a free float quad rail you will need to change the barrel nut to the threaded type for the q/r to thread onto. Also you will need to get a low frofile gas block that will fit under the q/rail.. pretty sure on this but Im sure others will be along to clarify
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Old 07-27-2012, 01:29 PM   #4
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Thanks guys! I will post a couple pictures later today. The Q/R is not threaded, so I guess that means its not a free float. I think. I'll have to look again.
210.jpg  
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My budget collection
Mut AR-15 (just like a dog, built from different breeds)
High Standard 12 ga pump
Remington Viper .22 LR
Chipmunk .22 (not for me, for the kids)
Walther P22 (wifes x-mas present, personalized with "momma's peace keeper")
Taurus PT 145 .45
Kel-Tec P3AT .380
Remington 742 .30-06
and growing..... when the wife permits!

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Old 07-27-2012, 04:00 PM   #5
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Here's a couple more pics.
484.jpg   486.jpg   481.jpg   488.jpg  
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My budget collection
Mut AR-15 (just like a dog, built from different breeds)
High Standard 12 ga pump
Remington Viper .22 LR
Chipmunk .22 (not for me, for the kids)
Walther P22 (wifes x-mas present, personalized with "momma's peace keeper")
Taurus PT 145 .45
Kel-Tec P3AT .380
Remington 742 .30-06
and growing..... when the wife permits!
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Old 07-27-2012, 04:02 PM   #6
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Is this what I need? I must need something else to secure the front end of the Q/R too.

http://www.brownells.com/.aspx/cid=0/k=AR+low+profile+gas+block/t=P/ksubmit=y/Products/All/search=AR_low_profile_gas_block
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My budget collection
Mut AR-15 (just like a dog, built from different breeds)
High Standard 12 ga pump
Remington Viper .22 LR
Chipmunk .22 (not for me, for the kids)
Walther P22 (wifes x-mas present, personalized with "momma's peace keeper")
Taurus PT 145 .45
Kel-Tec P3AT .380
Remington 742 .30-06
and growing..... when the wife permits!
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Old 07-27-2012, 06:00 PM   #7
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Ya the low pro gas block will work for you. If you intend on using a free float rail, you don't want to attach anything up front. It will defeat the purpose of the free float. The advantage of the free float is that you don't mess with the harmonics I the barrel up front. The rail will all connect up by the upper receiver only. Hope that helps.
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Old 07-27-2012, 06:25 PM   #8
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Judging by the pictures, what you have there is NOT a free float hand guard. Also it will not work on your rifle because it is designed to work with a Rifle length gas system. Your rifle has a carbine length gas system and is therefore not compatible. The scope riser could be useful if you have a scope that requires more clearance for the objective lens. It looks to be too tall to allow for co-witness of a red dot. I honestly can't say for sure since your BUIS is in the down position. Maybe you could trade that hand guard and scope riser for a flip up front sight. That would at least allow you to aim the weapon.

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Old 07-28-2012, 05:48 AM   #9
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I thought I could get away with a low profile gas block and slide my current gas block forward to accept the front of the quad rail. I currently have a scope and front & rear BUS they just aren't in the pictures. Thanks for the help fellas. I'll let you know how it turns out.
__________________
My budget collection
Mut AR-15 (just like a dog, built from different breeds)
High Standard 12 ga pump
Remington Viper .22 LR
Chipmunk .22 (not for me, for the kids)
Walther P22 (wifes x-mas present, personalized with "momma's peace keeper")
Taurus PT 145 .45
Kel-Tec P3AT .380
Remington 742 .30-06
and growing..... when the wife permits!
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Old 07-28-2012, 11:21 AM   #10
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Quote:
Originally Posted by knutsen24 View Post
I thought I could get away with a low profile gas block and slide my current gas block forward to accept the front of the quad rail. I currently have a scope and front & rear BUS they just aren't in the pictures. Thanks for the help fellas. I'll let you know how it turns out.

Please take some time to familiarize yourself with the function of every part on the weapon before you try to start making modifications. Moving the gas block is not an option without moving the gas port , which you are probably not capable of doing. If you had tried to do that(move the gas block), it would have ended in a very dangerous situation for you. Again, PLEASE educate yourself on the function of every part of the rifle. If this were airsoft you could make mods with no worries other than wasting a few dollars. This aint airsoft and serious injury could result from ill-conceived/uninformed modifications.

Bottom line Have fun but be very careful

EDUB
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