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Thread: RRA Entry Tactical Inspection (8/07)

  1. #11
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    Not skintop, but probably because they have a tendency toward unreliability (we had another one poop the sheets in class yesterday)

    From a doctrine standpoint, a "match" trigger makes no sense. It is a carbine, not a sniper rifle, and while it makes the press nicer it would be hard to see any downrange improvement, and at the expense of reduced reliability.
    There are some that are getting better to be sure, but i consider them Money Transfer Units- your money goes to someone else w/o viable benefit on yout part.

  2. #12
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    Quote Originally Posted by Pat_Rogers View Post
    Not skintop, but probably because they have a tendency toward unreliability (we had another one poop the sheets in class yesterday)
    You're right as usual. The RRA is unsat for any meaningful task. In no uncertain terms.
    2012 National Zumba Endurance Champion
    الدهون القاع الفتيات لك جعل العالم هزاز جولة الذهاب

  3. #13
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    I had a surplus RRA two stage trigger when I put together my carbine. It had roughly 3500 rounds + a crapload of dry fire cycles on a yellow glass rifle when it came off that gun.

    Since going on a carbine it's had another 1600 rounds through it and still reliable. I think I'll keep it on just to determine its breaking point.

    Yep, it's a sample of one, and it in no way becomes a wholesale endorsement of RRA two stage triggers in general.

  4. #14
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    We also had a competitive shoother in this same class (Memphis PD) that had a RRA trigger in his gun that ran well.
    For his purposes, it made sense. For a service grade gun, it doesen't.
    Most stuff works. Some doesn't. I'm not sure i want a sometimes performer on a gun i need.
    Your choice, your consequences.

  5. #15
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    Quote Originally Posted by Skintop911 View Post
    I know, I know. Is there a 12-step program?

    "But...but...but...the fit and finish is great!"

    "But...but...but...mine is fine! Not a single jam in 150 rounds!"

    The chips fall where they do, for better and worse.

    I just love the "jam" word when describing a malfunction.

    "Jam goes on bread son."



    C4

  6. #16
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    Range day this morning.

    After restaking the carrier keys with a P-MOACKS a new problem emerged. Following insertion, the carrier met substantial resistance at the point the key screws entered the receiver. A quick check of the receiver and carrier finds nothing abnormal. Same result upon reinsertion. This time, I forced the carrier forward and found the same resistance throughout carrier travel into battery. Removed, repeated. Signs of friction were then found in the upper corresponding with the sides of the carrier key base.

    I double checked the carrier key. Straight and true. No excess material displaced. No apparent issue.

    Time for a parts swap. BCGs from 2 Colts, 2 Bushmasters, and 1 DPMS were available. The problem BCG inserts easily and travels smoothly in all other guns. The BCGs from those guns insert easily and travel smoothly in the RRA, but with less play. Aha.

    I found a file on my multi-tool and cleaned up the sides of the key, and voila.

    Diagnosis: Stacking tolerances between the receiver and the minimal material displacement caused by the restaking.

    Noteworthy: The 2 BM and DPMS carrier had been done with the same P-MOACKS in identical fashion. Almost two dozen others haven’t produced the same issue, either.

    Thereafter, the RRA fired a few hundred rounds of exercises and COFs without issue.
    2012 National Zumba Endurance Champion
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  7. #17
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    Quote Originally Posted by Skintop911 View Post
    Range day this morning.

    After restaking the carrier keys with a P-MOACKS a new problem emerged. Following insertion, the carrier met substantial resistance at the point the key screws entered the receiver. A quick check of the receiver and carrier finds nothing abnormal. Same result upon reinsertion. This time, I forced the carrier forward and found the same resistance throughout carrier travel into battery. Removed, repeated. Signs of friction were then found in the upper corresponding with the sides of the carrier key base.

    I double checked the carrier key. Straight and true. No excess material displaced. No apparent issue.

    Time for a parts swap. BCGs from 2 Colts, 2 Bushmasters, and 1 DPMS were available. The problem BCG inserts easily and travels smoothly in all other guns. The BCGs from those guns insert easily and travel smoothly in the RRA, but with less play. Aha.

    I found a file on my multi-tool and cleaned up the sides of the key, and voila.

    Diagnosis: Stacking tolerances between the receiver and the minimal material displacement caused by the restaking.

    Noteworthy: The 2 BM and DPMS carrier had been done with the same P-MOACKS in identical fashion. Almost two dozen others haven’t produced the same issue, either.

    Thereafter, the RRA fired a few hundred rounds of exercises and COFs without issue.

    Interesting. This would leave me to believe that the RRA upper receiver was on the tight side (maybe out of spec?). This must be why RRA doesn't stake their keys.


    C4

  8. #18
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    Quote Originally Posted by C4IGrant View Post
    Interesting. This would leave me to believe that the RRA upper receiver was on the tight side (maybe out of spec?). C4
    T'would seem so, esp when you can drop the same carrier into other guns without a problem.

    I've been told that the tighter tolerances in the RRAs are not flaws, but a feature.
    2012 National Zumba Endurance Champion
    الدهون القاع الفتيات لك جعل العالم هزاز جولة الذهاب

  9. #19
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    Quote Originally Posted by Skintop911 View Post
    T'would seem so, esp when you can drop the same carrier into other guns without a problem.

    I've been told that the tighter tolerances in the RRAs are not flaws, but a feature.
    Yes, I have heard this as well. I also hear that they have the best fit/finish of any AR as well. This is a very important feature when selecting a fighting weapon.


    C4

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