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Posted: 1/28/2017 10:44:11 AM EDT
| I have a 18" barrel with rifle gas. The stock is a XLR Tactical that has a Kaw Valley 3oz carbine buffer and carbine spring per XLR instructions. I am wanting to use an AIM lightweight BCG (8.9oz) if possible as I am trying to keep this rifle as light as possible. I can deal with a little more recoil in exchange for lighter weight but I do want absolute reliability. Will I have issues with short stroking or bolt locking back using this described combination?My gas block is not adjustable. |
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IMHO....Ideally, a adjustable gas block should be used with a LtWt BCG.
AR's are designed to use a certain weight BCG with a OEM gas port size.... if you lighten up the BCG without adjusting the amount of gas pressure on it... You could be cycling the BCG so that you induce a variety of feeding issues.... buffer bounce, BCG cycling faster then the mag spring... etc. I strongly suggest you get an adjustable gas block. |
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Quoted:
IMHO....Ideally, a adjustable gas block should be used with a LtWt BCG. AR's are designed to use a certain weight BCG with a OEM gas port size.... if you lighten up the BCG without adjusting the amount of gas pressure on it... You could be cycling the BCG so that you induce a variety of feeding issues.... buffer bounce, BCG cycling faster then the mag spring... etc. I strongly suggest you get an adjustable gas block. yeah. what I have is a V Seven titanium. They dont make an adjustable gas block out of titanium that I an aware of. With the rifle gas, I figured the pressure would be lessened and I could get away with out an adjustable as I dont expect it to be over gassed. Do you think it could actually be over gassed? The barrel is a Green Mountain stainless. I did not measure the gas port but could easily remove the gasblock to do so as it hasnt been fired yet and isnt quite ready for a range trip. Still waiting on optic. |
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IMHO, it is worth it to substitute reliability over weight.
Especially in this case. Personally I would prefer a steel GB ... but.... here are some Titanium http://slrrifleworks.com/index.php?route=product/category&path=57_125_169 And its not just the pressure of the gas... but the volume of gas as well. |
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Quoted:
IMHO, it is worth it to substitute reliability over weight. Especially in this case. Personally I would prefer a steel GB ... but.... here are some Titanium http://slrrifleworks.com/index.php?route=product/category&path=57_125_169 And its not just the pressure of the gas... but the volume of gas as well. Thank you sir. Whats another $179 at this point  I am already dick deep in what I think is the worlds 2nd most expensive AR build.
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Quoted:
yeah. what I have is a V Seven titanium. They dont make an adjustable gas block out of titanium that I an aware of. With the rifle gas, I figured the pressure would be lessened and I could get away with out an adjustable as I dont expect it to be over gassed. Do you think it could actually be over gassed? The barrel is a Green Mountain stainless. I did not measure the gas port but could easily remove the gasblock to do so as it hasnt been fired yet and isnt quite ready for a range trip. Still waiting on optic. I've one of those barrels on an SPR-style build, and it's nowhere close to being over-gassed. .103" port. |
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Quoted:
Thank you sir. Whats another $179 at this point I am already dick deep in what I think is the worlds 2nd most expensive AR build.A year or two back, I recall some guy posting the extensive parts list for his lightweight build, together with prices and weight. As I recall, when I added it up, and divided by the final weight he posted, it came to $42.79 an ounce. If nothing else, that'll give you a goal to shoot for..... 
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I agree. Also, the little bit of weight you gain from the adjustable gas block you can more than make up for by either using a gutted carbine buffer (1 oz total weight) or going with a Taccom delrin buffer (1.2 oz I believe). Plus it will shoot a little softer.
Quoted:
IMHO, it is worth it to substitute reliability over weight. Especially in this case. Personally I would prefer a steel GB ... but.... here are some Titanium http://slrrifleworks.com/index.php?route=product/category&path=57_125_169 And its not just the pressure of the gas... but the volume of gas as well. |
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