I have an Oly AR with also a 9mm upper conversion. Never dealt with lasers so thought I'd try one. Bought a real cheap set up on Eway. Its a red laser and is great indoors or after the sun sets but absolutely useless in sunlight. Yeah, ya get what ya pay for. My question here is, is there any affordable laser set up, would have to be bbl. mount; that would be viable in sunlight?