This in-depth review video by Mrgunsngear covers Adams Arms’ compact 300 Blackout AR-15 pistol featuring their mature P2 adjustable gas piston system. The 8-inch 4150 nitride barrel with 1:7 twist pairs with a lightweight 7-inch M-LOK handguard for excellent accuracy and heat dispersion. Range testing showcased incredible precision, with the 147gr supersonic ammo producing sub-MOA groups around 1-inch, while 220gr subsonic loads stayed comfortably under 2 MOA.

Mrgunsngear provides a detailed breakdown from tip to butt, praising the ergonomics like the Radian Raptor ambi charging handle, crisp backup sights, and stellar Hyperfire RBT trigger. Mrgunsngear also discusses the pros and cons of piston vs. direct impingement systems, praising Adams Arms’ refined piston system design. The piston operation cycles smoothly while keeping the action much cleaner than direct impingement.

With flawless reliability through 1200+ rounds, the P2 piston system competes with premier military rifles at a lower price point. An impressive, American-made piston AR ideal for hardcore 300 BLK enthusiasts.

This video covers the Adams Arms P2 piston-driven AR pistol in the hard-hitting .308 Win/7.62 NATO caliber. Despite the compact 12.5″ barrel, Colion Noir is apprehensive about the punishing recoil – but quickly embraces the masochistic enjoyment of launching such a massive bullet. He praises the ergonomics like the Ergo grip and Radian ambi charging handle for taming the ferocious .308.

Range testing highlights the impressive accuracy and power, with the gun bullying steel targets viciously. The smooth single-stage trigger and intuitive bolt release enhance the rapid combat handling. Though meant for hunting, Colion Noir touts it as a formidable truck gun capable of handling any threat.

Authentic American touches like the classic A2 flash hider, flip-up iron sights, and Picatinny rail allow customization. At around $1,500, Colion Noir suggests this is an insanely affordable price for a premium .308 piston AR. An undeniably badass, recoil-thumping beast for hardcore shooting enthusiasts.

This detailed video review covers the Adams Arms P2 piston-driven 5.56 AR-15 rifle. An experienced AR shooter puts the 16-inch barrelled 7lb rifle through its paces. Highlights include the government profile barrel, A2 flash hider, included flip-up sights, and free-floated 15-inch M-LOK handguard.

The P2’s piston operation keeps the action much cleaner than direct impingement, requiring less frequent cleaning and lubrication. Despite adding some front-end weight, it remains relatively lightweight and well-balanced. Range testing with over 300 rounds proved its reliability with no malfunctions.

The ambidextrous controls, premium trigger, oversized charging handle, and sturdy machined components are notable features. Offers great value for a quality American-made piston AR suitable for suppressed use. An impressive modern sporting rifle ideal for AR enthusiasts seeking the reduced maintenance and fouling of a piston system in a durable, accurate, and reliable package.

Footage shows the P2’s bolt remaining cool even after rapid firing, unlike a DI gun’s bolt. The reviewer argues that while piston ARs were once considered less accurate, modern examples like the P2 are extremely precise, even at extended ranges up to 1,080 yards. The video provides an overview of the P2’s features like its 1:7 twist barrel, quality trigger, and adjustable gas system. It also touches on the history of piston ARs, including Eugene Stoner’s AR-18 design that inspired many modern piston rifles.

While both systems have improved, the reviewer leans towards piston ARs for their potential longevity with less maintenance. However, he acknowledges the widespread parts availability for DI guns. Ultimately, he recommends AR enthusiasts try out a piston gun like the Adams Arms P2.

Key features are covered like the 1:7 twist barrel, adjustable gas block, and ease of tuning with just a screwdriver. The reviewer also praises the rugged monolithic rail and notes the ability to adjust gas settings without tools in a pinch.

While praising the upper’s reliability and cleaner operation, the reviewer sees piston and DI guns as roughly equivalent today. However, for a supremely reliable and cleaner running AR, he recommends considering a piston-driven system like the impressive Adams Arms upper.