Wow, its good to see the put up or shut up directly from the manufacturer.

I've been considering buying the PWS rifle in 7.62x39 as my next purchase.
How does it hold up to the old milsurp ammo as well as the steel cased Russian stuff?

I know my Mini 30 doesn't like steel cased ammo and I'm forced to shoot brass cased ammo in it.

Have there been any extensive testing with any or all of the cheap ammo out there?   

The MK114 in 7.62X39 was developed and tested to be used with Wolf, or any of the other common steel cased ammunition available.  In 7.62X39 AR platforms in the past, steel cased ammo has been cited as the cause for broken extractors.  We have not seen this in our bolt and we believe it to be due to the fact that we took the print for a 6.5 Grendel bolt and re-engineered it for use with 7.62X39.  We've seen one isolated case of a broken extractor in over 2 years of production. 

Wolf, Golden Tiger and other steel cased 7.62X39 has been used with our MK107 and MK114 uppers and rifles in 7.62X39.  All this aside, I really do recommend not using the old mil surp stuff that is floating around that is corrosive.  Yes, all surfaces in our weapons are either corrosion proofed through finish or through the type of alloy used, but there is no reason to run that highly corrosive ammo with all the choices in 7.62X39.
I hope this helps and thank you for the support.

I think the engineering and design on the diablos is awesome.  Only issue was op rod failures.  I had heard that they would start being cryogenic hardened which would reduce the chance of a failure.  Our concern is that through personal experience I saw an op rod break and pierce the top rail if the receiver headed straight for the shooters face.  It stopped short embedded in the aimpoint T1.  Until I am convinced this has been a rectified issue I'm wary.  That being said the failures are isolated incidents and it's just a personal choice to make sure that's fixed before carrying the rifle at OGC.

Hello to the 2aHawaii Forum and its members.

I would like to thank every PWS Rifle, upper, and accessory owner in the Islands for your amazing support of the MK114 and other PWS products.  It is very exciting to see so many people thrilled with your products and how the word of mouth spreads like wild fire when that product impresses its new owner.
This being said it is disheartening and frankly sad when someone posts incorrect (everyone makes a mistake) or worse yet, fabricated misinformation in order to try and dirty a particular product, manufacturer or their dealer's reputation in the eyes of those that read this forum.

As a result of the above post, I would like to ask the posting party for OGC Tactical to produce documentaion of this failure of an op-rod piercing the top rail or admit that their post is completely fabricated and untrue. 

If anyone here has any questions about the quality and reliability of our products, you can contact me directly at the following.

PWS Inc
Mr. Stacey Nagy
stacey@primaryweapons.com
208-344-5217 ext 206