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AR Lower Parts Kits

Discussion in 'Rifle Discussion' started by Soren, Jul 11, 2014.

  1. Soren

    Soren Beaverton, Oregon Active Member

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    I have decided that I'm going to build an AR-15. Seems like it is going to be more fun than just buying one (plus I can stretch out my budget rather than saving up). I'm going to pick up a lower this weekend. I have searching online for lower parts kits. It seems like the prices vary anywhere between about $40 and $100 (sometimes from the same company on the same website) without any explanation of what makes one better than the other.

    So, what do all you here recommend? What should I look for? What should I look out for?
     
  2. djaziatic

    djaziatic Portland, OR Bronze Supporter Bronze Supporter

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    They're all pretty similar when it comes to lower parts kit.

    I like dpms or spikes tactical.
     
    ZA_Survivalist likes this.
  3. PDXSparky

    PDXSparky Keizer / Hillsboro Well-Known Member

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    Spikes would be my 1st choice. Rock River Arms is OK too.
     
  4. djaziatic

    djaziatic Portland, OR Bronze Supporter Bronze Supporter

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    I run spikes lower parts kit without FCG. And with a geissele automatics SSA-E trigger.
     
  5. Mr Smith

    Mr Smith 54 68 65 20 73 74 69 63 6b 73 Active Member

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    Almost exactly what I did/am doing..

    I believe mine is a JP lower parts kit without FCG, and am also going to run a Geissele SSA-E trigger. Great way to do it if you plan on running a different trigger than the stock trigger.
     
  6. rds801

    rds801 Portland Member

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    My first LPK was a Palmetto State Armory kit. My second was a Spikes. I use to be under the assumption that LPK's were basically the same. In my case, that is not true. The PSA kit was better than the Spikes. The Spikes had a creepy pull to it (not sure how to explain it). Put the PSA on my duty AR and the Spikes in my other one.

    Ended up replacing the PSA with a Geissele SSA and the Spikes was replaced with a QMS.
     
  7. Soren

    Soren Beaverton, Oregon Active Member

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    So, overall, which one do you like the best?
     
  8. rds801

    rds801 Portland Member

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    The Geissele
     
  9. ZA_Survivalist

    ZA_Survivalist Oregon AK's all day.

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    Tac-con!
    Just kidding, I dont have that kinda money. I use run of the mill lower end LPKs..
    Unless you're paying big bucks for the crisper smoother FCG's nearly all GI standard LPKs are the same. I too fell for the gimmick and purchased an LPK for 100 and one for 45.. Both were the same.. One just had a brand name behind it.
     
    PORSCHE928S4 likes this.
  10. HappyRoman

    HappyRoman Sherwood Forest Bronze Supporter Bronze Supporter

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    Have personally use CMMG, Panther ARMs ( DPMS), generic, Del-tron, and another.. ALL WORK. would go with Generic..
     
  11. rds801

    rds801 Portland Member

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    What are you going to use your rifle for? If it's just a range toy I would recommend this PSA Kit only because I had good luck with it. They have other color pistol grips that are make the kit cheaper. I didn't like the standard grip so I switched them out to the MOE grips.
     
  12. 3MTA3

    3MTA3 DMZ between Liberty and Tyranny Behind Enemy Lines Bronze Supporter

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    Go to Curt's on McLoughlin Blvd. They had everything I wanted for my very picky build except for barrels (building 2) I custom ordered from the manufacturer. GREAT prices that compare very well to Internet discounters and you get it same day. My lower parts, all from Curt's:
    • Aero Precision Lower (I like forged)
    • ALG ACS trigger (they have many others)
    • Magpul Advanced trigger guard
    • Magpul BAD lever
    • Spikes ST-2 buffer
    • Mil-spec buffer tube & spring
    • KNS anti-roll pins
    • parts kit to complete with mil-spec parts
    Parts are still being cerakoted, so I haven't picked up the furniture yet.

    The parts kit was pulled from the bins they use to do their own builds, and to me looks to be of very high quaity.
     
  13. John H

    John H Whatcom County Well-Known Member

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    I have used PSA, PSA P-Tac ( before I knew what it was ), Spikes, Stag. All have worked fine. BUT They were not all the same. They were all different. Triggers were slightly different, and a few other things. But the over all function doesn't change.
     
  14. Bigboblargerobert

    Bigboblargerobert Sweet Home New Member

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    If your somewhat mechanically inclined you can to minimize the long, slow trigger pull by Googling "Junkyard genius" and follow his trigger mod method.
     
  15. Mr Smith

    Mr Smith 54 68 65 20 73 74 69 63 6b 73 Active Member

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    yes you can do a cheap trigger job by replacing the stock springs with yellow JP springs, and using a small set screw above the hand guard screw to adjust the creep out of the trigger. Even with those done it is still a junk single stage trigger.

    Rather have a two stage trigger where I absolutely know without a doubt: what point that trigger is going to release the hammer and fire that weapon.
     
    jbett98 likes this.
  16. jb11

    jb11 salem Active Member

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    I have 2 builds with stag lpks , and 1 with a cmmg. I prefer the cmmg myself.
     
  17. 3MTA3

    3MTA3 DMZ between Liberty and Tyranny Behind Enemy Lines Bronze Supporter

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    What did you like about CMMG vs. Stag?
     
  18. jb11

    jb11 salem Active Member

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    little better fit and finish , fcg seems a little more crisp then the stag. All in all I think they are both GTG.
     
  19. jb11

    jb11 salem Active Member

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    x2 on Curts for anything Black rifle related good guys , very helpful. Please post some pics when your build gets done.
     
  20. 3MTA3

    3MTA3 DMZ between Liberty and Tyranny Behind Enemy Lines Bronze Supporter

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    Here is a preview - Color is foliage green with FDE furniture to break it up. I'll do a writeup in a separate thread when it's complete.:
    upload_2014-7-20_14-0-4.png
     
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