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Posted: 12/7/2004 6:13:14 AM EDT
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When observing the operating mechanism functionality in the lower of my AR last night, I became curious after noticing what appeared to be two 'hooks' on the disconnector and hammer which line up together when the hammer is cocked, but never actually make contact. Though, they look like they should. And, they actually do if I pull the hammer down far enough (without using excessive force, as well I might add). My AR functions fine and I built it with Colt parts and all of that, but it just looks like the two hooks as shown here in this pic should line up via the red line:  What gives? |
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That is what prevents the AR from 'slam firing'. It grabs the hammer when it comes back if you're still pulling back on the trigger. Try this (it's part of the Function test). Pull back on the charging handle and set the rifle on fire. Pull back the trigger (and hold it) - the hammer will fall. While holding the trigger, pull back on the charging handle. Release the trigger - did you feel that click? That was the hammer getting released to go to it's sear (instead of being held by the disconnector). |
Will a 3-shot burst or F.A. rifle not click right then or something? |
If your setting is on 'burst' or 'auto' it will not click - only if the rifle is set to semi will it click. Full details on doing a function check should be covered in the -10 (available for free download from this site - see the Information button above). |
Please keep your posts serious in all areas of the board outside of General Discussion and the Pit. We view the entire board (save the two mentioned) as "technical" forums and expect all posts to be serious and non-argumentative. Thank you. Mike (tbk1) Staff, AR15.com PS: You may wish to change your profile to accept Instant Messages, so such things may be said in private. |
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"Read That FINE Manual" - it's not just a good idea. Honestly, there are a lot of REALLY impressive design features in the AR. Mr. Stoner integrated everything from radical (the gas system) to "tried-and-true" (parts of the trigger system). In the FCG, though, I think he really excelled. Most previous selctive fire weapons (the M14, for example) use very complicated linkages to enable full auto fire. The linkage in the AR is ONE CAM. In "Semi" the selector disables the auto sear and lets the disconnector catch the hammer after each round. In "Auto" it does the opposite. The magic is how the bolt carrier trips the auto sear. The M14, on the other hand, uses a rod that pulls its disconnector off the hammer when the bolt carrer/operating rod is just about to hit its stop. The M14's selector pivots the "connector" away from the disconnector for semiauto fire, and lines it up for full auto. Controllability of the design aside, the Garand-type mechanism of the M14 is a marvel, but it's pretty inflexible, and M14s firing full auto have a number of issues involving parts breakage and misalignment (the disconnector is pretty small and the connector can get bent just enough to miss it entirely). THANK YOU MR. STONER! |
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