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Posted: 12/8/2018 6:48:11 PM EDT
[#1]
Quoted:
Hey guys so I am mounting a light on my 7.5 .300blk. It has a m-lok handguard and there isn’t much room for clearance under the guard for the mount. I am using a 5 slot MOE rail section. One of the screws is hitting the gas block. Is this going to hurt anything? Also the light is an Inforce HSP and in order to get the light where I need it I can’t sit it on the whole length of rail and it’s not real solid. Anybody else have that issue? |
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Posted: 12/8/2018 6:56:25 PM EDT
[#2]
FPNI
If your handguard or anything attached to it is touching the barrel or anything attached to that, you are losing the benefits of freefloat barrel. And if your screw is really pushing the gas block, it may skew things up and make your barrel and your sights not point in the same direction anymore. Install the mlok accessory in a different slot and count how many threads are exposed when it's cranked down. Thats about how much you can shrink the screw with a dremel, grinding wheel, or file. |
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Posted: 12/8/2018 7:20:21 PM EDT
[#3]
I modified the piece of rail section so I ccould move it forward about a half inch. Now it’s not touching anything and it has plenty of clearance. I’m just kind of pissed I left a chip at the edge of the block before I noticed the screw hitting. It literally would have cleared if I had a mm more to move it. They really should make the screws shorter.
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Posted: 12/8/2018 7:23:35 PM EDT
[#4]
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Posted: 12/10/2018 12:49:25 AM EDT
[#5]
The small diameter rails are the culprit on short barreled AR's. I had the same problem with mine and had to grind down most of the screws on my accessories. The Magpul AFG only has a couple mm clearance from the gas block, once I shortened the screws.
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Posted: 12/10/2018 1:09:00 AM EDT
[#6]
Reading through the thread, it sounds like we all encounter the issue when attaching stuff to the front end of our shorties. Same solution too, we just grind.
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Posted: 12/10/2018 9:20:02 AM EDT
[#7]
I have a .936" gas block. I even had to grind the nuts! One part I'm even considering just tac welding to my hand guard.
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Posted: 12/10/2018 9:40:02 AM EDT
[#8]
Had a similar issue using an ALG Mlok rail on my 10.3" build. I used loctite on the front screw and chose not to use the back screw as it hit the gas block. Haven't seen any movement or loosening.
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