Before Ruger sold a 25 round magazine the general consensus @ RFC was that the TI25 MACHINED ALUMINUM 25 round Ruger 10/22 high capacity magazine was the highest quality 25 round mag available.
While the BX 25 is cheaper and "factory" I still prefer my TI mags.
http://www.tacticalinc.com/ti25-machined-aluminum-steel-lipbrmagazine-ruger-1022-p-212.html
