crazyragincajun

Finally got the longer gas tube in. I bought a rifle length 308 buffer setup too just to make sure i can have a reliable rifle. 3d printed a sleeve to use a mil spec stock on the rifle buffer 😉

Good point. Ill have to measure the barrel. While i just had a lathe and mill delivered today, its going to be a bit before i can use them. I doesnt sound like a longer gas system is worth testing on 16".

Cool. I might try as is since my buffer is lighter than that and see what happens. While i was paying freight i got a 308 rifle buffer system anyway, just incase the short buffer ends up being problematic. I also may end up leaving it as a straight pull bolt action by turning the gas off. Its a side charger, so easy peasy for that. Options, they are nice if they work lol Thanks for the gas info!

98Z5V & Others: I greatly appreciate the tech info in this forum. very good stuff i like digesting. I bought a .308 BCA upper. (yes i know its considered cheap crap by some). I have some 5.56 stuff from them and was happy with it so i got it on sale and im going to try and make the best of it. Since i know its a compromise using things like mil spec carbine tube length and short 2.5" buffer, I'm trying to make it closer to stoner's design characteristics. Tore the upper down and this is what i have. 16" barrel. sold as a Mid Length, 0.086 gas hole. BCG weighs 17.7oz 2.5" buffer weighs 3.8oz, but is solid inside. i watched high speed video of BCG bounce with solid buffers, so im going to make my own Carrier Weight System or drill out the buffer and put moveable tungsten in it, so it has the dead blow effect. .308 specific spring for milspec carbine buffer tube. Gas tube that came with it was 11 3/4 long tip to tip. center-ish of the gas hole is drilled 9.840 from front face of upper gas tube hole. this put the gas tube a little shallow in the upper, about 1/4 of the way into the cutout. The gas tube has about .400 before it would bottom out in the BCG at installed location. 12.062" gas tube has been ordered. adjustable gas block will be used. I know the .308 has more recoil force on the case itself than 5.56, there was a test done where they connected two guns via gas tube. the gas only wouldnt really unlock and cycle the bolt of the other gun. therefore, i would suspect, less dwell time should work better than the 5.56 design parameters since it also has more gas volume, but a larger surface area to fill, so idk. What i want to know is, has anyone put an intermediate or rifle length gas system on a .308 with a 16" barrel? Am i wasting my time trying to plug the shorter location hole and drilling a new hole closer to the barrel end vs using the gas block adjustment? does the AGB make the rifle more finicky with ammo/temp changes vs a shorter dwell time by reducing dwell distance/pressure by moving the gas sample 1.5" closer to the barrel, instead of 6.12" of dwell length, ~4.87" of dwell distance. what happens with .5" of dwell with a .308? would it cycle? does the gas tube ID become a restriction with that short of dwell? The way i see it, the BCG/Buffer weight does two things. absorbs force & feeds the next round in. Obviously there needs to be a certain weight to strip rounds off in all conditions. I doubt theres much more force required to feed a .308 vs a 5.56 round from friction, distance, ect. So that being said, recoil absorption without having a bolt speed too high or too low reward is the focus.