Howcome screw and bolts are good enough to hold Indy cars,truck/trailers,jet engines,nuclear reactors,hydro electic generators,satellites,space shuttles, and bicycles together but you don't think they should be used on guns? I'm pretty sure the rod bolts in a 3000 hp top fuel engine or rocker cradle bolts in an f1 are taking one hell of a beating without coming undone....proper torque is key and locktite has it's uses. The brake callipers on your car are BOLTED on and secured with a compoud such as locktite.... How many times have they fallen off? This problem with the xcr is easily cured, I don't know how it was allowed that some left the factory in a contition that they could come loose but I'd hardly call it a design flaw. Any 12 kid with a pack of Allen wrenches and a tube of locktite could permanently fix the only problem with the xcr that I've heard about. Loose screws.... Big efin deal. I completely stripped mine, locktite'd er up and nothings come loose after 1000 rounds, 300ish were fired in -15c to -30c weather. I cleaned it twice, once before shooting and after the first 40 or so rounds. 3 cycling issues in total, 2 caused by not seating the mag and one from the case bouncing of the wall back into the chamber backwards. I'd love to hear about the other "design flaws". Are fte's,ftf's,bobs common? Trigger failures? Bolt carrier issues? Cuz I haven't heard of any. So far all I've heard about is one broken firing pin and loose screws. I'm not saying there hasn't been other problems but I haven't heard of any. I've got glocks, I hear bad stuff about them all the time. Would anyone here call glocks garbage? In regards to Robinson flat out telling you what happens if your rude, well if you are rude at a restaraunt your getting a little extra DNA in your new pasta. If I had a rude customer I'd hand him his car parts in a box and call him a tow truck. Being a #### doesn't get you far. I love my xcr. I've fondled an hk and I don't know which one, sl8 or g36, that's how much I cared for it. I've played some with ar's and the charge handle is in the most retarded place you could have put it, the bolt release is pretty cheese burgler too. The ar's charge handle is a design flaw if I've ever seen one.