Magnus DUX Posted April 26, 2017 Share Posted April 26, 2017 New to me JR Carbine's bolt gets stuck after firing couple of rounds. It gets stuck in the middle of it's travel and it takes huge amount of force to even move it. After I dissemble the uper, take the bolt out, put more lube- it is tight but slides back and forth fine. After reassembly- same thing. Couple of rounds and stop. Previous owner, who I trust, said he never had any issues with it. Any ideas? Link to comment
Pat Miles Posted April 26, 2017 Share Posted April 26, 2017 (edited) Misread to OP's post, thought it was a JP gun. Edited April 26, 2017 by Pat Miles Link to comment
UFO Posted April 27, 2017 Share Posted April 27, 2017 They're pretty tight clearances, try some lapping compound to smooth things out. I polished my BCG. Link to comment
mscott Posted April 27, 2017 Share Posted April 27, 2017 Instructions say do not lube bolt. I've had mine for a couple of years and never lubed the bolt ever and runs perfectly. I'm guessing I've got 3k rounds through it that way. Also check to see if tail end of extractor is rubbing inside of receiver. I had to trim one down with a file. Link to comment
sx2gl35 Posted April 27, 2017 Share Posted April 27, 2017 I have a Gen3 JRC, got it about a month ago and sometimes have had this problem. My instructions say to "Lubricate them (bolt, bolt extension, receiver, and ejector plate) with Slip 2000 EWL prior to reassembly." I've been overdoing it (drenching with EWL) and will now try a lot less of it per mscott's advice. Also will lap and polish the next time I have it apart; thank you UFO. Link to comment
bobert1 Posted April 27, 2017 Share Posted April 27, 2017 I loved my JRC. I did lightly lube mine. Within the last 4 months, 3 shooters at my club have all had failure to feed issues. The round nose dives into the top of the barrel. Link to comment
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