I prefer Silencer over Muzzle breaks(though I use the Breaks more <.<), Its quite nice to shoot someone in the back, and since I'm not on radar watch them spaz out trying to find me. I also like the Speed Sling, but only slightly more, I prefer it on my side arms, but for primary I prefer the Grip for better stability, works wonders on the Rhett. Drum mags and Duel mags were pretty close...but I have to say faster reload is better than a larger clip in my opinion, I tend to spray more with a Drum, but since I just get a fast reload with Duels I make my shots count. And the RDS is just amazing on any gun, I only use the COGA on guns like the Rockstedi, the FRKN-3K etc. THe only time I don't use RDS is on pistols (just seems odd to me...) and on my shotguns, which i use Adjusted Iron Sites, I like perif on my shottys.