First

Are the Rem ADL and BDL guard screws the same length?

looks like they are and the front is too short for a magpul stock

Rem 700 BDL Kit includes:
(1) front guard screw - ¼"-28 x 1-1/16" (2.7cm),
(1) rear guard screw - ¼"-28 x 1½" (3.8cm).

Rem 700 ADL Kit includes:
(1) front guard screw - ¼"-28 x 1-1/16" (2.7cm),
(1) center guard screw - 8-36 x 1½" (3.8cm),
(1) rear guard screw - ¼"-28 x 1½" (3.8cm).

The same.
Both: ADL/BDL
Front 1/4x28 x 1-1/16
Rear 1/4 x 28 x 1-1/2

ADL
Center 8-36 x 1-1/2

For some of the funky after market stocks and clip magazines you have to buy jobber length screws and adjust them to what you need.

thanks
1/4x28x1-1/2 in SS is $8.00 for 25

or $8 for 2 plus shipping