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Thread: Low profile clamp on GB?
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18 May 2015, 16:46 #1
Low profile clamp on GB?
So I'm hunting for a low profile .750 clamp on gas block that will fit under a rail with a 1.3" inner diameter. The only company to give dimensions is SLR.
http://slrrifleworks.com/index.php?r...product_id=123
So with some math we get this:
Forend I.D. = 1.3" = .65" per side
SLR Clamp on GB = .58 from centerline to bottom
.07" clearance
That's not much. That's between 1/16 and 3/32 on an inch. Is that enough when trying to account for barrel movement/whip while firing?
I asked Daniel Defense about their clamp on GB's and they said there's would not fit. I'm also not really wanting an adjustable GB. Which I think pretty much just leaves Vltor as I'm sure as hell not going to use a Yankee Hill.
Thoughts? Idea's? Solutions?-One Nation, Under God
-"The bad news is time flies. The good news is you're the pilot." ~ Michael Althsuler
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18 May 2015, 18:02 #2Contributing Member
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Can't speak to quality or dimensions, but here are three more options for you to research.
https://www.veriforcetactical.com/pr...p-style-steel/
http://www.tacticallink.com/Naroh-Ar...10-Rifles.html
http://www.aimsurplus.com/product.as...50&groupid=590
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18 May 2015, 21:04 #3
I've got a DD .625 clamp on underneath a Midwest Industries Lightweight M-LOK handguard (which I believe may also have a 1.3" ID) and it just barely clears the bottom and renders the M-LOK attachment points immediately underneath useless. Frankly, I can't see how anyone else is going to be much slimmer than the DD. I believe the .750 gas block is identical in its external dimensions. You might just want to try a DD anyway.
The only other option I could think of to try is Black Rain Ordnance (I can't vouch for it): https://www.primaryarms.com/Black_Ra...bro-lp-750.htm
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18 May 2015, 21:37 #4
I think I'm going to have to either A) scratch off the idea of using a clamp on or B) let it stick out past the forend.
-One Nation, Under God
-"The bad news is time flies. The good news is you're the pilot." ~ Michael Althsuler
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18 May 2015, 21:42 #5
Why a clamp on vs a pinned or set screw? Those are usually slightly lower profile than the clamp on ones.
FFL 07/ NFA 02
TWN Certified Hydro Dipper
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18 May 2015, 22:33 #6
Accuracy purposes primarily. It's going to be used on more of a precision set up.
-One Nation, Under God
-"The bad news is time flies. The good news is you're the pilot." ~ Michael Althsuler
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19 May 2015, 11:45 #7
Question please ......... I'm not sure I understand how the version of gas block affects accuracy. Would really like to know - it may alter future builds. Thanks.
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"I won't be wronged, I won't be insulted, and I won't be laid a hand on."
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19 May 2015, 14:18 #8
Using setscrews shouldn't be a problem in most cases. Just dimple the barrel and you should be good to go
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20 May 2015, 10:02 #9-One Nation, Under God
-"The bad news is time flies. The good news is you're the pilot." ~ Michael Althsuler
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20 May 2015, 10:25 #10
I see no possible way a properly installed set screw gas block would cause a bore deformation. By that logic a clamp on block would also cause bore eccentricity. You are talking inch/lbs of torque on those small set screws.
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20 May 2015, 12:02 #11
Yeah I thought about that too. I guess I could kinda see it causing pressure as things got hot and expanded, the set screw would be the point where things were the tightest.
I just figured since I'm building for precision I'd explore the option if I found something that would fit.-One Nation, Under God
-"The bad news is time flies. The good news is you're the pilot." ~ Michael Althsuler
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20 May 2015, 17:28 #12
It's a little bit of a different direction but another option is a Knights Armament Mod 2 upper. Their new gas system secures the gas block with a lock nut and no pins. They say it decreases gas leakage while increasing barrel rigidity.
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20 May 2015, 18:47 #13