Yesterday we looked at the novel Radial Delayed Blowback system invented by CMMG for their 9mm AR carbines; today we are taking it out to the range to try. It does indeed do exactly as advertised - even in a lighter platform like this SBR, the recoil impulse is significantly less than in simple blowback 9mm ARs. Very cool to see innovation still existing in a marketplace that has been so heavily optimized!