AR-15 quad rail question

[d30carls]

I have the DPMS oracle (.223/5.56). I am about to order a 15" free float quad rail for it but before I did I had a question. Will the gas block be in my way or will I end up having to order a new one of those as well? It sits fairly low compared to the 2 piece rail I have on it now. but I do not have it in front of me to really look at it since I am at work.

 

[Big Dave]

What brand of quad rail did you order?

 

[tradertator]

Might, might not. Depends on which rail it is, what kind of gas block, and it's hard to tell without seeing it or some more information.

 

[d30carls]

it is a trinity force quad rail off Amazon the gas block is the factory one for this model. I am trying to upload a photo but it is not working for me very well

 

[M67]

Most of the time on optics ready carbines you have to grind the gas block down in order to get the rail over it.

Round the top edges and sides by the tube, then grind off the sling mount underneath. Touch up with high temp krylon

 

[d30carls]

Most of the time on optics ready carbines you have to grind the gas block down in order to get the rail over it.

Round the top edges and sides by the tube, then grind off the sling mount underneath. Touch up with high temp krylon

do you just grind down the rail portion of the gas block?

 

[NyleRN]

If your current gas block has a top picatinny rail then it's going to be too big to fit under just about any tube besides maybe a spikes BAR. You need a low profile block.

 

[JeremiahJohnson]

There are four sizes I know of - Carbine, Midlength, Rifle Length and Extended Rifle Length. I think a 15" quad puts it into the "extended" range which means even if you have a rifle length barrel and gas system, you'll need the gas block to fit under the quad rail. Therefore, you'll need to purchase a low profile gas block. They're easy to take off and/or replace so it should be no problem. Low profile gas blocks are usually in the $45 range.

 

[throttletony]

order a low-profile gas block. $20-$30, unless you want something adjustable or fancy.
Youtube has good info about this as well.
(It's worth looking to see if you current barrel has dimples on the bottom, opposite of the gas port (hole). With dimples you can use a set-screw gas block, without dimples, some people prefer clamp on type. Set screws will even work in a barrel without dimples, but won't be as secure.
Or if the gas block is pinned (I don't the the Oracle is), there are other options there as well.

 

[M67]

do you just grind down the rail portion of the gas block?

Hell, forgot Oracles had a railed gas block. Don't attempt to grind that thing. WAY too much material.

Buy a low pro Troy or Yankee Hill for $25-$30 and save yourself the trouble.

 

[JeremiahJohnson]

The cheapest one IN STOCK at Midway is a doublestar for $34.

 

[throttletony]

Hell, forgot Oracles had a railed gas block. Don't attempt to grind that thing. WAY too much material.

Buy a low pro Troy or Yankee Hill for $25-$30 and save yourself the trouble.

look at Odin Works parts as well, high quality and priced very fairly.

 

[42769vette]

Hell, forgot Oracles had a railed gas block. Don't attempt to grind that thing. WAY too much material.

Buy a low pro Troy or Yankee Hill for $25-$30 and save yourself the trouble.

This. It can be ground down to fit, but its definitely not worth the effort.

 

[d30carls]

Thanks for all the info guys guess i will be ordering a low pro gas block too do you think it is worth it to go adjustable

 

[NyleRN]

No need for an adjustable on that rifle

 

[NyleRN]

Only thing is that you need to know if your current block is set screw or clamp on.

 

[Big Dave]

I agree....have a low pro on mine and it's great.

 

[M67]

Only thing is that you need to know if your current block is set screw or clamp on.

They're set screw


ETA


And here could be your new low pro gas block

https://www.indianagunowners.com/forums/parts-accessories/367205-yhm-low-profile-gas-block.html