Yes, they replace the existing plastic baseplate. They fit tight, but the little ears on the side of the mag is the only retention otherwise. Too bad you weren't looking for blue - I'd make you a killer deal.
Also, I'd recommend running the Dawson extensions over the aluminum bases.
NRA Life Member
*19c, 23c, 24*
Last edited by PVolk; 01-28-2013 at 23:28..