There is a reason BCM has remained top dog in the real world, and the MCMR series of rails is a big key to it.
The slick design is both minimalist but adequate for all applications you might need for your AEG or GBB. The finish is pleasant to the touch but not too smooth as to lose your grip.
These rails use standard M-lok as a means to attach accessories. You can see from the photos that you get plenty of these at the one, three, five, six, seven, nine, and eleven positions.
As for attaching the rail; each are supplied with the appropriate barrel nut as well as shims to help time the rail to fit the receiver cleanly. The handguard clamp should be tightened only to hand-tight torque during installation.
If you own a VFC AR GBBR or a standard AEG, these will be a drop in fit. If you own an MWS, you might need this part here by BBA to fit it. Luckily they are very affordable.
*Disclaimer; These are not real BCM made rails. They are made by a third party specifically for airsoft.
