Meaningful improvement over stock m18 grip - Wilson Combat Sig Sauer WCP320 Carry Grip Module

Immediately changed the grip out on M18 after trying WC grip at the range rental. Much improved hold on the weapon right after. Note, for CA-compliant M18's that have magazine disconnect safety mechanism you will need to do one of two things to ensure the FUC properly sits inside: 1) remove the said mechanism (it's just one screw holding the whole apparatus, simple, quick, and safe), 2) shave off about 3/16" gap with a Dremel at the back of the WC module to accommodate the said mechanism. If you don't, the FCU will not install all the way to the back of the grip (about 1mm) too forward which will prevent slide catch from sitting down in its cutouts on the grip.

Oh, and the grip looks great too!