I'm getting ready to lay down the $140 for the Texas Weapon Systems top cover rail setup and I'm wondering about rear sight options. The $40 they want to charge for that dinky little rear peep seems a little insulting and exploitative in my opinion after spending so much on the rail to start with. Personally, I think that such a small part should just be included in the package since it is basically useless as is without the additional purchase of an optic or their peep sight. I'm a little annoyed so I'm looking for other options. I have the Bolton FSGB installed now and it lines up fine with