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Posted: 6/18/2009 5:43:11 PM EDT
| Can anyone confirm whether or not the SCAR 16s uses the same gas plug as the military SCAR? I know the mil version has 2 positions, one for normal use and one for suppressed, but is this the same as with the 16s? |
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I'm pretty sure it does. The one on my 16s is indeed a two position plug, and as far as I can tell looks the same as ones seen on military scars. I have not opened mine up, but others are saying that while the 16s gas plug has 2 gas ports, one for each position, they are both the same diameter. Not sure if someone has confirmed this or not. |
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Quoted:
Quoted:
I'm pretty sure it does. The one on my 16s is indeed a two position plug, and as far as I can tell looks the same as ones seen on military scars. I have not opened mine up, but others are saying that while the 16s gas plug has 2 gas ports, one for each position, they are both the same diameter. Not sure if someone has confirmed this or not. Hmm, I don't know then. I haven't opened mine since I got it, but I am pretty sure they are different sizes. I sure hope it is the same as the military version. Okay, I took some pictures of my plug. The two gas holes do look the same diameter, but there are two little vent holes that are also on the plug. I feel like when the plug is turned to the suppressor setting, these vent holes line up some where and some how, and vent the excess gas. Then in the normal mode I think these vent holes are positioned to vent either less gas or no gas. Facing the front of the plug, the main gas hole is at 6 o clock, the secondary gas hole is at the 7 o clock, and the little vent holes are at the 3 o clock. Anyway, here are the pics: These are the gas holes 
Here are the vent holes on the other side of the plug 
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| I've shot mine with and without a suppressor, on both settings. The difference is minimal in either setting, suppressed or unsuppressed. However I can tell a difference in how far the brass is ejected, depending on the setting of the regulator. This leads me to believe there is a difference in the settings. Either way, it's really a moot issue. The reasoning behind the gas regulator on the .mil version is that it helps to control the ROF to a lower level when firing auto (with a suppressor). Since the civy version is semi only, the ROF really isn't of any concern. |
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Quoted:
I've shot mine with and without a suppressor, on both settings. The difference is minimal in either setting, suppressed or unsuppressed. However I can tell a difference in how far the brass is ejected, depending on the setting of the regulator. This leads me to believe there is a difference in the settings. Either way, it's really a moot issue. The reasoning behind the gas regulator on the .mil version is that it helps to control the ROF to a lower level when firing auto (with a suppressor). Since the civy version is semi only, the ROF really isn't of any concern. The higher rate of fire is due to the higher gas pressures with a suppressor. The higher pressures will cause increased bolt carrier velocity and accelerated internal wear and tear on almost every moving part down the line. Even in semi-auto the suppressed position will bleed the excess so bolt carrier velocity remains nominal and your internal parts don't get beaten up. The suppressor setting is mostly about extending maintanence intervals and overall weapons system lifespan. |
| The suppressed setting on the .mil version was intended to restrict the gas into the system to help bring the ROF down to the level of unsuppressed fire. Any extended lifespan is just a added bonus. Part of the reason why this is so critical when firing in auto is related to the timing of the action (regardless of it being a SCAR, M1, etc). When shooting burst or auto anything you add into the equation (as happens when you increase gas pressure with a suppressor) interferes with the overall operation of the system, which in turn leads to premature wear and tear. Another reason is being able to hit what you're shooting at. This is why some people go with different buffer weights or types when shooting the M16 suppressed. It's true the same forces are in play when firing semi, however they are much less pronounced. It's nice to be able to control the amount of gas going into the system when shooting semi (such as using the Noveske switchblock on a AR), but it's not necessarily a deal breaker. Otherwise, the vast majority of the various suppressed platforms where this cannot be controlled would be unusable. |
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