If you like the AR platform but the AR-10 just isn’t enough power for your needs, you may want to contact Peter Noreen from OnlyLongRange.com. The latest offering from The Gun Room Co., LLC is the Noreen “Bad News”, a piston driven AR based rifle chambered in either .300 Win. Mag or the increasingly popular .338 Lapau. This rifle is a beast and I was honestly surprised to learn that it weighs in at around 13 pounds. As expected with the AR platform, you can use any LPK or drop in trigger you want as well as a number of stock options that fit the AR-10.
An interesting twist on the piston design has placed the piston back in the upper receiver instead of towards the front of the hand guard. The reasoning behind this is to reduce or eliminate barrel harmonics which can make a significant difference on long range shooting. The down side is that all that gas and debris is now going right back into the upper which defeats one of the top benefits of gas piston systems.