washguy Posted January 16, 2013 Report Share Posted January 16, 2013 Hi Guys well ive been keeping a secret from you all while I worked for weeks on this problem of a car not locking back and therefor causing ftf's and fte's with a case sticking in the chamber mostlyYes after 25 of building ar's I built one that wouldnt lock back....and of course it had to be the Mega monolithic 6.8 <laughs>when it happened first time out my jaw hit the bench!polishing the chamber....nopechanging bcg.....nopechecking gas port size...perfectgas block even changed em out...no buenochanged out buffers,springs....nopedifferent ammo ...nopehere's where im embarresed....Harrison said send the upper to him even though i only bought the barrel from him...now thats service beyond!Harrison sez upper works fine...sends it backwhile the upper is on its way back i get a flash in my mind of BayouBobs problemo with his cmmg car that wouldnt work until one day they sent him his car back with a a2 stock on it and it worked fine.....hmmmmm Here's where the problem is...and maybe just maybe why there are short stroke problems for the guys!I take off a buffer tube of a car that works fineinside length 7"I take off the buffer tube off the lower that wont workinside length 6 3/4 "put a new 7" buffer tube on the mega 6.8....works like a champ! the 3/4" short buffer was causing the cycling problems! :) Washbuffer tube that short strokesbuffer tube that works fine Quote Link to comment Share on other sites More sharing options...
unforgiven Posted January 16, 2013 Report Share Posted January 16, 2013 Confession is good for the soul.Don't you feel better now brother Jeff <lmao> <laughs> What other dark secreats are you hiding,we don't judge. :o <lmao> Quote Link to comment Share on other sites More sharing options...
Robocop1051 Posted January 17, 2013 Report Share Posted January 17, 2013 What kind of buffer are you using in that? I believe they make a shorter buffer for those shorter tube. Quote Link to comment Share on other sites More sharing options...
washguy Posted January 17, 2013 Author Report Share Posted January 17, 2013 What kind of buffer are you using in that? I believe they make a shorter buffer for those shorter tube.Robo thats my point. The buffer tube is a standard buffer tube ..actually they are both standard 5/6 position buffer tubes.....I used a standard car buffer in the faulty one, and tried various h2's h3's bufferswhat im saying is ...the short buffer tube is a machining mistake by over 3/4 of an inch...its not that its sold as a short buffer tube....its a mistake that costs people time and effort to try to find out what may be causing a short stroke problem...I had eliminated every possible part that was causing the lock back problem....it came down to a mis machined no name cheap buffer tube :) Wash Quote Link to comment Share on other sites More sharing options...
Robocop1051 Posted January 17, 2013 Report Share Posted January 17, 2013 Damn it Wash! Quit wasting good ammo money on faulty buffer tubes! :bat: Quote Link to comment Share on other sites More sharing options...
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