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#73 Bolt Stop plunger spring dimension


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#1 kullwarrior

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Posted 04 July 2012 - 03:47 PM

Since replacement part are probably not going to be available can anyone provide me the proper dimension of the Part #73? I lost mine when my bolt catch bolt fell out (can't find it)
Becareful, it'll fly out when you take it off
1) Remove mag catch
2) gently pull boltcatch up (towards the upper receiver when its closed).

#2 BoobieM4H

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Posted 04 July 2012 - 05:08 PM

I don't have the manual so I have no idea what part #73 is..but from you are talking about it sounds like the spring for the detent pin for the bolt catch? When you pulled the firing pin block out it flew out right? Any spring that isn't to stiff should work..probably about 5mm long should work..
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#3 kullwarrior

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Posted 04 July 2012 - 05:14 PM

Yeah its the detent spring. Even though my bolt carrier can now be release via charging handle I would much prefer the stock form due to the fact bolt carrier cannot lock back without it. How did it you get it to lock back without it?

#4 BoobieM4H

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Posted 05 July 2012 - 01:51 PM

I removed the detent and spring, added a spring where there is a spring normally on a WE gbbr bolt catch, and bent the arm down a lil on bolt catch that the mag pushes up on when empty..also took my dremel and dremeled some material off the bolt catch around the area where the pin goes thru that holds the bolt catch onto the firing pin block. This allows the bolt catch to go up higher and make a more positive lock on the bolt. It catches more bolt surface when the bolt catch is engaged.

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