ADL has a blind mag (no hinged floor plate or detachable magazine) ... generally speaking, the metal on this model is finished to a lower quality than the BDL or CDL - it has more of that true, rough, matte finish
BDL has the hinged floor plate under the mag, and generally has a better finish on the metal ... usually a satin or highly polished blue, and the nice jeweled bolt
SPS is the Special Purpose Synthetic ... and practically speaking, it has taken the place of the ADL line
If you follow this link -
Remington Model 700 Rifles - it will take you to Remington's centerfire rifle page, and you can see the way they describe the rifles ...
