MarshallDodge
Member
That looks good. I'm working on a gray 16" build right now.My 7.5" is like that but my 10.5" has very little muzzle flash. Next I'll do a 12.5".
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That looks good. I'm working on a gray 16" build right now.My 7.5" is like that but my 10.5" has very little muzzle flash. Next I'll do a 12.5".
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The point is a more portable package. Sure, you'll lose some velocity but it doesn't totally neuter it and I don't need to stretch a 10.5" carbine (braced pistol) to 400yds anyway.I'm one who feels the rifle (barrel length) and caliber/cartridge (powder, burn rate) are generally designed to be symbiotic. I know tons of people build AR's with a <10" barrel, but I don't see the point. That being said, I wouldn't personally go lower than 11.5" for many of the reasons (and pictures!) listed above.
I still want a cite for this if you have one.The Army released a study where they found the bullet has exited the bore and traveled several feet down range before the system pressurizes. . .
The mass of the gas is only about 25 grs, depending on what powder is used. The energy comes from heat expansion. Unrestricted, smokeless powder expands at about 5700 fps, if I recall correctly. Regardless, it works.I still want a cite for this if you have one.
Your explanation is plausible provided that the operating fluid is heavy enough to store the operating momentum. If the mass of the operating fluid was high enough to store operating momentum in the gas traveling up the gas tube, then you could uncork the muzzle before the pressure wave reached the piston. I think the gas is too light to do that.
So, citation please.
When I built my 10.5" SBR, I went with a Noveske barrel, after a bit of back and forth with them over the particulars. This was a few years ago, so don't ask me for details. But, they pretty much explained that its the gas pressure at the port as the bullet passes, but also how long that pressure is applied, aka, distance from port to muzzle. I could probably weigh the buffer they said to get, and say which it is but it would all be valid only for a standard spring and then Noveske port. What they said was pretty much in line with another page I saw that had all the different buffer configurations, weights, innards... It was a heavier buffer than the carbine type. The spring is a standard carbine spring. Anyway, Noveske said "do it this way" and I did it the way they said. No issues, no battering, no nuthin, the rifle just works as it is expected to work, and shows good accuracy with the Aimpoint Pro. Basically the rifle will do better than I can with that set up, and I don't think I'd have any issues hitting say a standard "torso" target out to more distance than I'd have any reason to shoot during a defensive situation.
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Forgot to say a "Flaming Pig" takes all of the flash, and a lot of the bark and makes 'em disappear. They say the sound is "directed" forward. Dunno, but its not any worse to shoot than the carbine length. I've also got a Noveske 7.5 inch on the other SBR, different buffer, same spring. That one also is pretty well tamed with the Flaming Pig. They're big, heavy, but work.
Suppressor "may" need different buffer, depending on length, no?