by David Crane david at defensereview.com Small arms designer/developer J.D. Jones of SSK Industries has developed what may just prove to be a superior solution to the 6.8x43mm SPC (a.k.a. 6.8 SPC) and/or 6.5 Grendel (6.5x39mm) cartidges as a replacement for the 5.56x45mm NATO cartridge for U.S. military general infantry and Special Operations (USSOCOM) use. Mr. Jones is calling it …

by David Crane david@defensereview.com DefenseReview first reported on the M16 Clinic AR-15/M16/M4/M4A1-platform 5.56x45mm subcarbine/SBR (Short-Barreled Rifle) weapons packages back in December, 2004. That first article discussed the select-fire/full-auto,  SOPMOD M4 CQBR (Close Quarters Battle Receiver)-style M16 Viper and M16 Viper-XRP (eXtra-Range/Perimeter) 5.56mm subcarbines/SBRs, which are built specifically for military Special Operations applications, including anti-terrorism/counterterrorism operations. These weapons would appear to …