AR 15/9 question

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  • outrider58

    Eats Bacon Raw
    MDS Supporter
    Jul 29, 2014
    49,815
    And then I had questions as to which trigger to use. It was then I found out that Geissele would void the warranty if I used their trigger in an AR9.

    I have Geisseles in both my 9s. Haven't broken one yet. I know they won't warranty their FCGs if used in direct blowback guns. They can be harsh. However, they are nice in AR9s. If it breaks, throw it away and put a pack trigger in it. Stuff breaks and wears out.
     

    teratos

    My hair is amazing
    MDS Supporter
    Patriot Picket
    Jan 22, 2009
    59,775
    Bel Air
    I have Geisseles in both my 9s. Haven't broken one yet. I know they won't warranty their FCGs if used in direct blowback guns. They can be harsh. However, they are nice in AR9s. If it breaks, throw it away and put a pack trigger in it. Stuff breaks and wears out.

    Same. Geissele triggers in both my AR-9’s.
     

    calicojack

    American Sporting Rifle
    MDS Supporter
    May 29, 2018
    5,348
    Cuba on the Chesapeake
    I have Geisseles in both my 9s. Haven't broken one yet. I know they won't warranty their FCGs if used in direct blowback guns. They can be harsh. However, they are nice in AR9s. If it breaks, throw it away and put a pack trigger in it. Stuff breaks and wears out.

    Same. Geissele triggers in both my AR-9’s.

    Good to know.
     

    calicojack

    American Sporting Rifle
    MDS Supporter
    May 29, 2018
    5,348
    Cuba on the Chesapeake
    Any more news on the Scheel buffer? have put one in my cart about 5 times now, but haven't bought one yet. Will definitely snag one if it runs reliably, and makes a big difference in recoil, but it's pricey, worried about wearing into the aluminum tube, and not sure how much of a difference it makes vs a RDB setup or a well tuned blowback setup.

    Same here :)
     

    alucard0822

    For great Justice
    Oct 29, 2007
    17,643
    PA
    Thank you guys for your in put, the verdict is that I'm basically passing on the Olympic, seems the issue is the work great until the don't, and then nothing can get them working properly again. Still thinking about the Anderson complete upper, have been looking at possible getting a PSA AR-9, and just switching out and adding the parts I want (think M16A2). Let me know if you guys have any thoughts.

    Have built a few AR9s, GLOCK dedicated lowers. The best for the money so far is the Aero EPC9, nice set, good controls, LRBHO is a simple wire linkage in the upper and completely reliable. I used Taccom BCG/barrel, feeds everything flawlessly, runs 100% with no tweaks after the build. The short stroke bolt is fast as hell, light recoil with 10oz buffer and 308 spring. It didn't run all that well with a Geissele GRF, hammer follow from getting bumped off the sear. That trigger runs fine in Long stroke AR9s. I found the Hiperfire PDI trigger, and it runs awesome, has a bumper, light crisp break, and enough sear/disconnector engagement that it doesn't inadvertently double or hammer follow.
     

    calicojack

    American Sporting Rifle
    MDS Supporter
    May 29, 2018
    5,348
    Cuba on the Chesapeake
    Didn't you originally have a problem with one of their uppers?

    Forgot to mention ...

    One thing I did not test adequately was hollow points. I had a few old reloads (from 35+ years ago) that were hollow points and one of those did not feed. I tend to save the hollow points for the home defense hand gun and have not been buying HP's for the range. If I think about it I'll get some factory hollow points just to see how they run.
     

    teratos

    My hair is amazing
    MDS Supporter
    Patriot Picket
    Jan 22, 2009
    59,775
    Bel Air
    Have built a few AR9s, GLOCK dedicated lowers. The best for the money so far is the Aero EPC9, nice set, good controls, LRBHO is a simple wire linkage in the upper and completely reliable. I used Taccom BCG/barrel, feeds everything flawlessly, runs 100% with no tweaks after the build. The short stroke bolt is fast as hell, light recoil with 10oz buffer and 308 spring. It didn't run all that well with a Geissele GRF, hammer follow from getting bumped off the sear. That trigger runs fine in Long stroke AR9s. I found the Hiperfire PDI trigger, and it runs awesome, has a bumper, light crisp break, and enough sear/disconnector engagement that it doesn't inadvertently double or hammer follow.
    I have an SSA-E in the gun I’m playing with. Maybe I should put a milspec trigger in….
     

    calicojack

    American Sporting Rifle
    MDS Supporter
    May 29, 2018
    5,348
    Cuba on the Chesapeake
    OP, these AR9's are a lot of fun, esp. if you like to tinker and get the ultimate shooter. I really, really, really, really wish I could SBR mine but in order to do so (Maryland 29" OAL requirement) I would need like an 11" barrel and a 7" is probably more optimal. I don't like braced pistols, but if you do, that might be a better option as opposed to a 16" barrel that, while being quiet, has a bit more thump. When I retire out of state, one of the first things I am going to do is create a 7" barrel 9mm SBR.

    If you do get a 16" barrel, get a muzzle brake. The FM9 upper came with a muzzle brake. Also - the FM9 upper has a side charging handle in the hand guard which is nice for that very stout buffer spring.
     

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