My LMT MWS was an 18” cut down to 16”. It ran so well that if I do another 16” 308, without a doubt it will be rifle gas. It ran consistently with a can or without. All ranges of ammo including some 30yr old German Army surplus, steel case and it was a subMOA if you did your part. The only ammo that did not cycle and I’m not really surprised was subsonic 308, 200gr. It wouldn’t extract or lock back. Maybe I could have played with buffer/spring or tried different ammo, but otherwise from 175gr down to 148gr it ran like a dream. Just do it. Sinner is correct there is plenty of gas for proper cycling. I used a Magpul UBR G2 as my stock and of course that uses an A5 length buffer tube. You can’t use the A5 buffer with the 308 as it’s too long (due to the 308 BCG being longer) so I used a standard carbine buffer - H2 and an Armalite rifle spring. My other 308, I used a heavy 308 carbine buffer which is shorter than a mil spec carbine buffer and the recoil impulse was a tad bit softer. That said rifle gas on a 308 is a definite improvement over carbine gas, which is my only other experience .

When I posted the barrel and parts for sale, some guy contacted me and asked if I would even trade my 416R SS 16” rifle gas barrel for his CMV 16” carbine gas barrel. Just like that. No money, an even trade. Lowballing morons like that often get no email from me - but that yahoo did admit dripped with sarcasm. Sorry I digress.. Anyway a buddy of mine from M4C and wevo, Docsherm built a AR-10/308 using a Noveske 16” rifle gas barrel. There aren’t a lot of barrel manufacturers that do 16” rifle gas in 308, but Noveske does and he is extremely pleased with the performance.
I like the 16” rifle gas so much that if push came to shove, I’d buy an 18” rifle gas and have Marvin Pitts (or someone of comparable talent)cut it down to 16” and rethread it.

Let me know if you have any questions. I’ll do my best to answer.


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