07-06-2011, 03:34 AM
hugh,
Need more info. There is an optimal apex of gas pressure to operate the AR and most other gas operated systems with certain bullet weights, charges, reciprocating masses, and recoil spring weights. If the gas expansion is too quick, it escapes out the bleed holes in the bolt carrier visible in the ejection port area, leading to a short-stroke, just as an under-pressured system would do.
It would be helpful diagnosing your system to know:
* bolt carrier weight (you said enhanced) M16, AR15, something different?
* gas port diameter
* gas system length
* lower receiver extension length
* buffer length/weight
* bullet weight(s)
* powder and charge weight(s)
I prefer to use a heavier buffer with the Grendel, not the standard AR carbine length buffers for 5.56. If you have a rifle-length stock/extension tube/buffer/recoil spring, that's better than a lighter carbine buffer with shorter spring. When trouble-shooting a new rifle/carbine, I recommend taking 2 or 3 buffer weights to the range with you. I really like the Spike's Tactical ST-T2 tungsten powder buffer for my 16" Grendel carbine, but you will need something different for a rifle-length tube if you have that.
LRRPF52
Need more info. There is an optimal apex of gas pressure to operate the AR and most other gas operated systems with certain bullet weights, charges, reciprocating masses, and recoil spring weights. If the gas expansion is too quick, it escapes out the bleed holes in the bolt carrier visible in the ejection port area, leading to a short-stroke, just as an under-pressured system would do.
It would be helpful diagnosing your system to know:
* bolt carrier weight (you said enhanced) M16, AR15, something different?
* gas port diameter
* gas system length
* lower receiver extension length
* buffer length/weight
* bullet weight(s)
* powder and charge weight(s)
I prefer to use a heavier buffer with the Grendel, not the standard AR carbine length buffers for 5.56. If you have a rifle-length stock/extension tube/buffer/recoil spring, that's better than a lighter carbine buffer with shorter spring. When trouble-shooting a new rifle/carbine, I recommend taking 2 or 3 buffer weights to the range with you. I really like the Spike's Tactical ST-T2 tungsten powder buffer for my 16" Grendel carbine, but you will need something different for a rifle-length tube if you have that.
LRRPF52