I just barely got some upgrades for my 20" 450. The first was the Mako shock absorbing M4 stock. I LOVE this thing!! It has taken out a lot of recoil!! The next isn't real special but man is it handy. I got an extended charging handle latch. I also got a very nice single point sling ring made by Tapco. All in all there is only a couple more things I want to add before it's perfect. Here are some pics of the goodies and of a group I printed off my work bench at 250 yards using my 300 grain SST loads.
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