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Started By
Message
To shave FSB OR install low profile gas block?
Posted on 5/18/14 at 2:04 pm
Posted on 5/18/14 at 2:04 pm
Intent of gun build: shite hits the fan scenario. Ultra reliability. Spare no expense build.
Question: Is there any 100% convincing literature out there that would argue that removing FSB and installing new low profile gas block is just as reliable as just shaving the FSB down? Just ordered my rail system and it's a 13" one, so I'll have to either remove or shave it.
Bapple or any of you other gun nuts have more than just opinion you can link me to to support your argument?
I lean on just shaving it down. It will be nearly visually unnoticeable because of my new rail system anyway, and I've read more forum posts saying that the stock fsb is definitely more tough/rugged. But, as forum nazis go in the AR world, you get people on both sides of the fence with a laundry list of credentials.
For those of you that support a low profile gas block, which make/model do you suggest?
I'm pumped. My first build is nearly done. I knock this install out, get a light and it's functionally complete. All I have left is to decide if or how I will cerakote it!
Question: Is there any 100% convincing literature out there that would argue that removing FSB and installing new low profile gas block is just as reliable as just shaving the FSB down? Just ordered my rail system and it's a 13" one, so I'll have to either remove or shave it.
Bapple or any of you other gun nuts have more than just opinion you can link me to to support your argument?
I lean on just shaving it down. It will be nearly visually unnoticeable because of my new rail system anyway, and I've read more forum posts saying that the stock fsb is definitely more tough/rugged. But, as forum nazis go in the AR world, you get people on both sides of the fence with a laundry list of credentials.
For those of you that support a low profile gas block, which make/model do you suggest?
I'm pumped. My first build is nearly done. I knock this install out, get a light and it's functionally complete. All I have left is to decide if or how I will cerakote it!
This post was edited on 5/18/14 at 2:07 pm
3
Posted on 5/18/14 at 4:32 pm to m2pro
Go with a new low pro gas block , at least that's what I do
Posted on 5/18/14 at 4:45 pm to m2pro
FYI: Make sure you get the double base one. I didn't and when I removed my FSP, the barrel wasn't finished where the site post was pinned. Had to order the correct one. Damn you RRA 
Posted on 5/18/14 at 4:48 pm to 4WHLN
Roger that. Good head's up, there! I think my buddy who is over-seeing me install it prob has a few extra but those can't be cheap. May just order some anyway.
Posted on 5/18/14 at 9:16 pm to m2pro
I'm assuming you don't have a pinned and welded flash hider. If you did, I would just cut the fsp down to avoid having to have the FH unpinned and removed then reinstalled. If you have a 16" barrel and normal threaded on FH, I might still consider cutting just the fsp instead of getting a new block. You know your gun runs as-is and it's not a hard modification. The pinned on gas block will be a little bit sturdier compared to the clamp on type.
Honestly, either option works, I figured I would just argue the other side for the sake of it and give a different viewpoint
Honestly, either option works, I figured I would just argue the other side for the sake of it and give a different viewpoint
Posted on 5/18/14 at 9:18 pm to 650Pirate
Been waiting all day on some kind of answer. At least I got one! 
Thx.
Thx.Posted on 5/18/14 at 9:30 pm to m2pro
Which rail system did you order?
Posted on 5/18/14 at 9:31 pm to m2pro
You won't get the barrel nut on with the fsb (cut down) attached. If you are looking to avoid removing the fsb that won't fly. You will have to remove the fsb, choice is then replace or put back on. I would cut and repin. Then again, you could buy a gas block for cheap too.
This post was edited on 5/18/14 at 9:32 pm
Posted on 5/18/14 at 9:38 pm to H.M. Murdock
Any loss of reliability to re-pin that you're aware of?
Also, while I have you two... any concept of how much it's going to run me to cerakote my lower and part of my upper / maybe my new rail system?
Also, while I have you two... any concept of how much it's going to run me to cerakote my lower and part of my upper / maybe my new rail system?
Posted on 5/18/14 at 9:44 pm to m2pro
Nah, as long as the gas ports line up and don't move the gun will function. I have several with the low pro with set screws, 556 and 308. I use loctite blue and never have had any issue. I have marked the block and barrel for reference to indicate any moment and have never seen any.
You cant screw it up. You can change either whenever. If you wanna save $40 use the fsb, if not get a low pro block.
You cant screw it up. You can change either whenever. If you wanna save $40 use the fsb, if not get a low pro block.
Posted on 5/18/14 at 9:48 pm to m2pro
I am assuming you bought a ff rail with barrel nut, not just a drop in two piece??
Oh and getting a barrel nut off is a choir...depending on manufacturer. Be sure to use a good vise block to avoid breaking the upper.
Oh and getting a barrel nut off is a choir...depending on manufacturer. Be sure to use a good vise block to avoid breaking the upper.
This post was edited on 5/18/14 at 9:50 pm
Posted on 5/18/14 at 9:49 pm to 650Pirate
quote:
Which rail system did you order?
bcm kmr 13
Posted on 5/18/14 at 9:49 pm to H.M. Murdock
quote:
I am assuming you bought a ff rail with barrel nut, not just a drop in two piece??
correct.
Posted on 5/18/14 at 9:50 pm to m2pro
On that rail you need need to remove the existing barrel nut. Make sure you use a good non graphite anti seize on the reinstall Moly slide is what you seek.
This post was edited on 5/18/14 at 9:53 pm
Posted on 5/18/14 at 9:51 pm to H.M. Murdock
for sure. looking really forward to that process, too.
Posted on 5/18/14 at 9:56 pm to m2pro
Posted on 5/18/14 at 9:59 pm to H.M. Murdock
good link. i was actually going to have to ask him tomorrow if he had some of that. is that for the threads of the barrel nut?
Posted on 5/18/14 at 10:01 pm to m2pro
Yea, put on the threads of the receiver...for the barrel nut.
Posted on 5/18/14 at 10:04 pm to m2pro
Google is failing me. What's a FSB?
Posted on 5/18/14 at 10:05 pm to Boats n Hose
front sight base :)
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