CMT 308 is Ready

[UWone77]

Even after an A5 and Slash's buffer/spring combo, the gun ran very rough. It would cycle unsuppressed, but it was a brutal recoil. Suppressed and it was hit and miss. The only thing that made it run 100% was then buying a gassed carrier, but even then, it was still pushing a lot of energy back at the shooter. I eventually ended up taking it all apart and the barrel is sitting, waiting to be sold.

Let me talk to the guys next week and see if we can work something out for you. How long ago did you buy that barrel?

[gatordev]

308 ARs are finicky beasts, which is why Rich and I always preach factory guns.

Completely agree. While it can sometimes be a blunt instrument, my SR-25 has had zero function issues. Since I had the spare receiver parts (Mega) and came across a M110 rail for a song, I figured I'd take the chance.

Let me talk to the guys next week and see if we can work something out for you. How long ago did you buy that barrel?

November 2015. After a pretty epic injury and recovery, and by the time I had it assembled and then tried all the combinations to get it working, I had had it well over a year which was outside the warranty period, and totally my doing, so I never bothered Rainier about it.

[UWone77]

Completely agree. While it can sometimes be a blunt instrument, my SR-25 has had zero function issues. Since I had the spare receiver parts (Mega) and came across a M110 rail for a song, I figured I'd take the chance.



November 2015. After a pretty epic injury and recovery, and by the time I had it assembled and then tried all the combinations to get it working, I had had it well over a year which was outside the warranty period, and totally my doing, so I never bothered Rainier about it.

Send me a PM with the specs on the barrel, detailed description of what happens suppressed, and I'll see what I can do.

[Slippers]

308 ARs are finicky beasts, which is why Rich and I always preach factory guns. If you build one, though, you should absolutely use an adjustable gas block, gauge the chamber, and check the headspace.

Buffer/spring/tube configuration is always confusing, so just remember that a 308 carrier is longer. These combinations work together:

A5 buffer tube with H3 carbine buffer (NOT an A5H3 buffer) and Armalite EA1095 spring

Rifle buffer tube with Armalite AR10 rifle buffer (shorter than AR15 rifle buffer) and EA1095 spring.

DPMS also makes a shorter carbine buffer if you insist on using an AR15 carbine length buffer tube, but it's the worst possible combination.

The 308 BCG is bigger and heavier, so you need the armalite spring and a fairly heavy buffer to counteract it. I have never seen Slash's super heavy buffer help, though, and find it to be ridiculously overpriced. No use for sprinco springs, either.

[BoilerUp]

308 ARs are finicky beasts, which is why Rich and I always preach factory guns. If you build one, though, you should absolutely use an adjustable gas block, gauge the chamber, and check the headspace.

Buffer/spring/tube configuration is always confusing, so just remember that a 308 carrier is longer. These combinations work together:

A5 buffer tube with H3 carbine buffer (NOT an A5H3 buffer) and Armalite EA1095 spring

Rifle buffer tube with Armalite AR10 rifle buffer (shorter than AR15 rifle buffer) and EA1095 spring.

DPMS also makes a shorter carbine buffer if you insist on using an AR15 carbine length buffer tube, but it's the worst possible combination.

The 308 BCG is bigger and heavier, so you need the armalite spring and a fairly heavy buffer to counteract it. I have never seen Slash's super heavy buffer help, though, and find it to be ridiculously overpriced. No use for sprinco springs, either.

Well, that's about as concise as an explanation of 308 buffer/spring/tubes as I've ever seen. FWIW, Aero uses the AR15 carbine w/ DPMS 308 carbine buffer I had no problems, but it is paired with an AGB. I use SLR Sentry AGBs on my two large frame builds (one Aero M5, one 2A Xanthos) and have been able to tune the gas for each reliably. Still waiting on my .30 cal can, though, so no comments for suppressed use, but I expect to dial the gas back a notch or two and be GTG.

[UWone77]

308 ARs are finicky beasts, which is why Rich and I always preach factory guns.

Missed this the first time around.

But yes, on AR10's I whole heartedly recommend Factory Guns.

I'm sure you guys can build your own just fine, but there are so many more variations and specs to AR10's.

My LMT MWS runs so much better than my other AR10's. I've got a Cross Machine Tool UHP10 that is a close second, but that LMT runs like a sewing machine and is so soft shooting.