I would like your input on something. I'm looking for a good quality .308 that uses piston system rather than DI. I've looked at several manufacturers trying to understand what each offers. I was talking with a retailer of several of the brands I've considered and he made an interesting comment. Specifically that pistons are great for .223 or 330black but for .308 there is too much gas pressure for current piston systems. He recommended I look at a DI riffle instead. I don't have enough insight into the industry as a whole to know whether this comment has some basis in truth or just someone trying to push me to a different product that benefits him more than me.

Your thought would be appreciated. Thanks.

Adams Arms is about to release their first run of piston .308s.

So long as the gas is properly controlled, and the components are beefed up to handle the extra pressure, vibration, and impulse forces, I cannot see why a .308 piston kit or rifle would be any less "ready" than a .223/556.

You met an idiot.

Worked on the Sig 716 for quite a while. External pistons have the same considerations as a di gun. Amount of gas in.  Amount of gas out.

The fact he thinks pistons are good for 300Blk shows he's talking out his rear. 300 is notoriously difficult to run with a piston due to the lack of gas.  It can be done, but it's much more difficult.

Maybe not an idiot, but ignorant for sure.

Many options available for 7.62-308. Just avoid POF.

Really, never had a problem with my PWS Mk112 in 300 blackout. I've got close to 2000 rounds through it without a hiccup.

OP, whover told you pistons weren't ready for 308 is an idiot, there are plenty of quality offerings out there. I have a PWS MK216 which runs like a dream, there are also other offerings like the REPR, POF, LMT etc.

Guess he hasn't seen the LWRC R.E.P.R.

I did say it can be done it's more difficult. The biggest issues are attempting to get one to run subsonics as they just don't have a ton of gas. The 556XI (the latest I heard) won't run with subs and LWRCi made a DI gun because of it.

.308? .308 has a ton of gas, it's easy.

No issue with my 716 yet.

My POF works flawlessly. I do need to get a better scope for it.

I won't debate idiot versus ignorant, as they are sadly not mutually exclusive but a lot of ill-informed gun counter jackasses say a lot of stupid shit. There are several piston 308/762 rifles that are damned reliable, such as the Ruger 762 and the Sig 716. he is probably the same kind of dangerous douche who sells a snub-nosed .38 or .357 to any woman who walks in, even if she is not going to carry it and knowing that if she does it will likely be in a purse, where there is plenty of room for a much more practical weapon. Did he tell you to get a shotgun because "you don't have to aim" from across the room too?

Chances being what they are with most humans, he probably just wants you to buy what he already has is stock.

If you go back (although I wouldn't) ask him if they have any M1As or M1 Garands on hand, and what kind of operating system they use next time.

Sorry OP (maybe sorta) if I just slammed someone you are friends with, and my intent is not to flame you, but hearing stupid bullshit from the guy on the other side of a gun counter really pisses me off, as they can actually get people killed by slinging said bullshit, although in your case he/she was maybe just ill-informed and telling you a less-than-life-threatening lie, "intentional" or not...but then again, speak not of what you know not.

It's better to say "I don't know" than to willingly or lazily misinform someone.

As always, this is JMAO, of course.

</rant>

Oh yeah, and the Patriot Ordnance Factory 7.62 is a beast, if you have the coin for it. One of my guys bought one of the SBR versions (10" barrel I think) and it is a fucking flame thrower. The REPR is sick too, again if you have the coin, as is the H&K piston MR762A1 (which I have read is a civilian version of their G28, which is currently in use in Afghanistan).

I went with the Ruger SR762 myself, because most of the others (although surprisingly not the Sig) were too pricey for me, and my Ruger SR556 has been abused aplenty, and has still run 100% since day one. I may end up with a Sig as well though.

Does anyone know if there is a 12 step program for black rifle adicts...?

Yes, but it's expensive.
You basically ween yourself off by buying pistols ... then you gradually move into motorcycles ... and then you start plowing money into track days.

There are plenty of excellent, reliable .308 Piston ARs out there. The LWRC REPR is probably the king of piston AR10s, but PWS, HK, and SIG all make excellent rifles. The gus at PWS have run the hell out of their Mk2s and they are extremely robust. Now, personally, the only AR10-style rifle for me is the LMt MWS308, which is DI, but they may introduce a piston kit for it in the future like they did with the MRP, but I'm not worried about the reliability of the DI. The Brits have been using the MWS308 with a few modifications, such as a slower twist for their barrels, for the past few years and it has proven very reliable in combat conditions.

Now, you will pay for these rifles, especially the HK and REPR. Me personally, if I was going to look for a piston AR10-style rifle I'd get either the REPR or PWS Mk2.

The main question is are you looking for a battle rifle or a precision/DMR rifle? If it's a battle rifle a piston would be great, but DI would be fine too. If it's a DMR type rifle you may want to consider a DI rifle. If you're wanting to do both, well then you'll just have to look at the options on each rifle and pick the one that has the most of what you want.

Shop owners will say anything to make a sale.  Manufacturers can make mistakes, but they didn't just cobble these together and send em out the door.  I went the SCAR 17 route, but will give AA a close look when it comes out.

You obviously haven't used the AA XLP with the lightened carrier.  My Blackout runs like a sewing machine.  It's an exceedingly efficient powder burn so the cure is lighter components and good gas seals, which AA makes as one of their claims with the XLP and I buy, no signs of any gas leakage anywhere. I don't even have to run it on the highest gas setting but with subs I do just in case.

And no, not an employee or a shill, just a satisfied money-paying customer.

I have a Ruger SR-762.  Ruger had some serious problems with the early production SR-762s.  If you go over to rugerforum.net, you'll see some of the tales of frustrated owners.  Some folks were rightfully pissed off, but Ruger has been working hard to make this right.

Mine was not an early serial numbered rifle, but had a serious POI/POA problem... like being ~20 MOA off.  Sent it back to the factory, it was returned in less than two weeks with a replaced upper.  It runs like a top.  It eats anything I put in it... Portugese surplus, steel case Wolf, Federal ball bulk, match grade stuff.  No problems at all.  While not a laboratory condition test, I've put over 500 rounds through it without a failure. Cleanup is a breeze.  You can adjust the gas regulator to match the ammo you're shooting.

I've since warmed the rifle over with a JPE muzzle break & buffer.  I shoot with my nose to the charging handle - it has less recoil than any of my AR-15s.  A Geissele SSA-E trigger, ambi safey & bolt release complete my changes.

It shoots 2MOA in prone with a sling (probably better with a more proficient owner) with 20 year old surplus ammo.  I would trust my life to this "piston not ready for .308" rifle.  

Am I a fanboy?  Nope, just a happy customer.  

Went together like my other piston guns.  No added difficulty at all.  It was a matter of someone taking the time to design the components to accomodate the parameters of the 300BO.  It's done, difficulty over.

I guess I'm fucked then. I started with pistols, motorcycles, and guitars, then black rifles took over for my Mini-14...of which I only ever needed one at a time...but now, it's complicated.

My mr762 runs flawlessly...

Or a PWS Mk2

I found going into 69 corvettes worked but my wife is actually more upset now than before and for the life of me, I can't figure out why

G28 seems to serve Budeswehr well. It is basically civilian HK MR308 (MR762 equivalent in EU and Canada) with chrome lined barrel, steel upper receiver, big flash hider and fancy stock and handguard (now available for MR series as well). Funny thing is that G28 has "MR" markings on parts and retains same "anti F/A" features, that German Police requested for civilian MR rifle.

My POF P-308, MR 762, SIG 716 all run flawlessly.

IMHO.
Check out LMT their .308 system is British army issue. They are tack drivers, function flawlessly.

I'm a pOF p-308 guy. Have a 14.5 and a 20".  Both run 100%


p-308 at the leona machinegun shoot Tannerite race

POF P-308 at 600 yards


And another at the 100yad line




So easy an 11yO girl can do it