DZelenka Posted July 11, 2021 Report Share Posted July 11, 2021 Attached are a couple pictures of my 1918A2 BAR's bolt lock. There are two on the top edge. Normal? Or do I need to replace? Does anyone have a good one laying around that they may wish to part with? Also, how long should the recoil spring that goes in the fore end be? Dan Link to comment Share on other sites More sharing options...
BillyDixon Posted July 11, 2021 Report Share Posted July 11, 2021 what does the locking area inside the reciever look like ? is this original gun, reweld, after market ? just wondering Link to comment Share on other sites More sharing options...
DZelenka Posted July 12, 2021 Author Report Share Posted July 12, 2021 what does the locking area inside the reciever look like ? is this original gun, reweld, after market ? just wondering Looked OK. Original gun. Link to comment Share on other sites More sharing options...
BillyDixon Posted July 13, 2021 Report Share Posted July 13, 2021 try very careful stoning off thr burrs, then put layout blue on bolt lock and assemble , cycle a few timed then dissamble and see the blue ware marks,, this should give you an idea if some thing not locking up right, just thinking Link to comment Share on other sites More sharing options...
emmagee1917 Posted July 13, 2021 Report Share Posted July 13, 2021 It's been awhile since I've owned one and the reoccurring unknown infection that gives me 107+ fevers has scrambled my brain somewhat , but isn't the locking surface the flat area aft of the curved arcs ? I don't think the worn areas do anything , but then why are they worn ?Chris Link to comment Share on other sites More sharing options...
damifino Posted July 13, 2021 Report Share Posted July 13, 2021 (edited) The spring in my parts kit is 16 1/2" (edit print shows 15.5+-.5 after setting). Do you think it tried to close on a broken case or some other obstruction. The locking shoulder is hardened, but so is the bolt lock. I think I would get a good look at the edge of the locking shoulder where it hit, and if it needed, carefully stone it flat also. Edited July 14, 2021 by damifino Link to comment Share on other sites More sharing options...
damifino Posted July 14, 2021 Report Share Posted July 14, 2021 (edited) I found this in the BAR prints. The spring in my parts kit must be a bulk cut to length replacement. Edited July 14, 2021 by damifino Link to comment Share on other sites More sharing options...
DZelenka Posted July 16, 2021 Author Report Share Posted July 16, 2021 My spring is 15.5" so it is good to go. Link to comment Share on other sites More sharing options...
StrangeRanger Posted July 16, 2021 Report Share Posted July 16, 2021 (edited) I don't have a BAR nor do I have a very good drawing of the innards but from what I do have: That curved area on the bolt lock slides over a corner between the inner surface of the rear part of the receiver top and the back edge of the locking recess in the receiver. I would be very concerned that over time those small depressions in the hardened bolt lock would impact that corner in the much softer receiver and damage it. Since malleable iron receivers cannot be repaired this is a non-trivial concern. I strongly suggest you send those pictures to a competent gunsmith and get a professional opinion and repair or replace the bolt lock if he recommends it Edited July 16, 2021 by StrangeRanger Link to comment Share on other sites More sharing options...
MG34bar Posted July 17, 2021 Report Share Posted July 17, 2021 My September, 1947 TM9-1211 Ordnance Maintenance manual gives the free-length of all BAR springs (p.23) and gives the proper recoil spring measurements as: coils=130; mean assembled height=11 inches; load at assembled height=9.6 pounds (+ or- 1); load at Min. Operating height=18 pounds (+ or - 1): free length=16.5 inches. Link to comment Share on other sites More sharing options...
damifino Posted July 17, 2021 Report Share Posted July 17, 2021 I strongly suggest you send those pictures to a competent gunsmith and get a professional opinion and repair or replace the bolt lock if he recommends itThe best advice. These may help. The drawings are out there. Link to comment Share on other sites More sharing options...
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