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Ruger AR 15 Barrel Specs...

Flymph

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If you want a free float handguard, you might need to get a low profile gas block.
More so, what type of gas tube and length of barrel.

I think most carbines use 7" handguards
 
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MarshalChillN

MarshalChillN

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Im looking at a low profile .750 aluminum gas block but dont know what size the barrel is...
.875 and .950 sizes are available so there is my problem.... WHICH to use/buy...
 

Flymph

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Google says 0.75 under the gas block and 0.85 under the handguard.
 
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MarshalChillN

MarshalChillN

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Thank you...Thats what I needed to know.
I'm trying to keep it as light as possible so was thinking the aluminum low profile gas block but do you think I should go with stainless steel instead?
 

Mygrainman

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If it’s the AR5.56 it is .750... Ive switched GBs on one before...
If it’s anything like mine, the barrel nut will be VERY difficult to remove...You will need to heat it up with a propane torch to release the lock tight they put on the threads... it’s some STRONG stuff!
I’d also go with steel lo-Pro gas block, and if possible have the barrel dimpled.
Definitely red loc-tite the gasblock set screws. Only place loc-tite belongs on an AR;)
 
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Im looking at a low profile .750 aluminum gas block but dont know what size the barrel is...
.875 and .950 sizes are available so there is my problem.... WHICH to use/buy...
Thank you...Thats what I needed to know.
I'm trying to keep it as light as possible so was thinking the aluminum low profile gas block but do you think I should go with stainless steel instead?
Don't use aluminum gas blocks.
Understanding the AR-15 Gas System
 
Last edited:

Reno

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I’ve cut off the delta ring and spring on an AR once without touching the barrel nut. Be it the rail you install has to use standard AR barrel nuts. It can be done. You can also dremel the front sight block to make a low profile gas block so you retain the pins, vs a bolt on or clamp on block.

1566013571303.jpeg

1566013597593.jpeg
 
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MarshalChillN

MarshalChillN

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Have Dremel Will Travel... LOL I just might try this approach as I figure Ruger did it right so who am I to change it.... :)
Thanks Trash...
 

Mygrainman

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Look at the Fortis Rev handguard in that case...
Excellent Rails, and use standard barrel nutz
 

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