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Couple of 9mm SBR Completed

Discussion in 'NFA Firearms and Accessories' started by RCArms.com, Jun 3, 2011.

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  1. RCArms.com

    RCArms.com Member

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    P1250748.jpg

    RRA 10.5" Magpul MOE stock and handguard.


    Second upper:
    P1250785.jpg

    RRA 7" slicked barrel, Magpul MBUS sights. Sweet handling little SBR that digests anything it's fed except JHP rounds. Fairly light too.

    Don
     
  2. wally

    wally Member

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    Other than THAT, Mrs Lincoln, how'd you enjoy the play?
     
  3. RCArms.com

    RCArms.com Member

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    My JPH pet load is a tad short OAL for the feed ramp on this carbine. If I decrease the seat depth towards the top end of acceptable specs, it would be just fine.

    As I don't use anything but FMJ rounds in it anyway, its not a big deal for me.

    Don
     
  4. wally

    wally Member

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    Is that a dedicated 9mm lower, or did you use a 9mm adapter block in a standard lower. I plan on sending in the forms to do an AR SBR next week.


    If its a 9mm block, which brand?

    Does it feed factory 9mm JHP -- things like Winchester SXT or Gold Dots?
     
  5. RCArms.com

    RCArms.com Member

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    It's a .223 receiver with a RRA adapter. I like the ability to use the Colt or modified Uzi mags over the Sten Mag based Olympic upper.

    I have done no JPH testing other than some of my personal 115G JPH loads. My guess is that a 124g or 147g JPH which is a bit longer seated close to max Cart OAL would stand a better chance of function.

    Don
     
  6. InkEd

    InkEd Member

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    Pretty nice rifles. Only thing I would change is the grip. I just can't stand the standard AR grip. Magpul makes a nice one without the finger bump.
     
  7. RCArms.com

    RCArms.com Member

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    I'm partial to the standard A2 grip. Haven't found any others that I am comfortable with.
     
  8. bikerdoc

    bikerdoc Moderator Staff Member

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    I am a huge fan of 9mm carbines.

    That is nice, How much time and work did it take?
     
  9. RCArms.com

    RCArms.com Member

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    Longest lead time item was the RRA upper. 5 months on that one.

    Other than that, simply pushing the pins on my properly registered SBR and installing a 9mm hammer, mag block, buffer, and the upper.

    Once all the parts were in my hands, the conversion took about 4 minutes.
     
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