Rifle Dynamics (RD) is known for making some of the best-built American AKs on the market. The RD 700 series is one of the most popular builds from the brand. It’s so prominent that Garand Thumb has his own 700 series build, the RD 704 SBR Garand Thumb Edition. Now, the company is ready to introduce its newest series to the family. Rifle Dynamics is proud to present the RD 600 Rifle Series.