This is a (re)build I did last year. So I finally setup my 300W the way I want it, only thing I'll probably do to change it will be to SBR it back to about 12". Sold the old barrel and some other parts and bought mostly used parts to keep the cost down. Runs like a champ, got a load figured out with a moly coated Hornady 225 match over 8.5 grains of H110. Cycles, locks the bolt back, 930 or so FPS, stabilized and had really good groups for subs. Rifle specs are: TP555 1-8 barrel, Shilen blank TP555 three position gasblock Rock River A3 upper Daniel Defense bolt group VLTOR CASV-M front end VLTOR VC301 flash hider (fancy thread protector) Magpul AFG, MOE handgrip, enhanced trigger guard, ASAP rear sling mount, CTR stock Burris PEPR scope mount Millet DMS-1 1-4x scope KNS non-rotational trigger pins in FDE, KNS "SWAT" sling, KNS upper/lower pins Jard 3-lb single stage non-adjustable trigger (LOVE this trigger!!!) Shot it suppressed today with my buddies CAC-9 via one of my one-off adapters I made for him. Sounded quite nice! Can't wait to get a .30 can of my own..... I can't wait to start playing around with the supersonic stuff now that I have the proper gas block for that.