If your talking about pushing the bolt into the bolt carrier by hand with the bcg out of the gun that is how it is supposed to be when it is made to spec. It feels wierd because most ar15 arent made with that attention to detail. So if your used to other bcg the bcm one does come as a surprise.
As for budget red dots the best out there that isnt aimpoint is the vortex sparc and vortex strikefire. Ive got both and they are pretty tough for a cheap optic. Ive had both mounted to my 458 winchester magnum elephant gun and they refuse to lose zero. Right now the sparc has found a home on my saiga12 and the strikefire is on my m&p 15-22.
Vortex has a no bs garuntee they dont care if you bought it from your best friend's cousin's sister's boyfriend or new in the box they will fix or replace the optic no matter what happens to it. Plus its a wisconsin company with a great rep for customer service.
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
The problem with being stupid is you cannot simply decide to stop doing dumb things...
"I crapped my pants to avoid the draft!!" -Ted Nugent