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Thread: Highest quality standard LPKs

  1. #21
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    I currently have an RB Precision LPK (bought and installed before I knew about G&R or even before I joined this site). Apparently they "source" the "best" individual parts to make up their LPK...for my sample of one, it has held up fine for over 3000 rounds, has a pretty good trigger, and everything seems to be in spec. Does anyone have any insight to where they get their parts?

  2. #22
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    Quote Originally Posted by Cobra66 View Post
    Thanks,

    So then what are the differences in parts that would distinguish one LPK from another? Why did you select one part supplier versus another one in your home brewed high end LPKs?

    Spring quality has already been mentioned. Adherence to military standards? Forged versus cast versus injected parts? Material and heat treating/tempering of the pins? US versus foreign (3rd world) produced?

    So Colt and DD both get their fire control parts from the same forge, what will Colt do to them that DD might not as far as final "finishing" goes? Will neither perform final finishing on LPK parts since that step would be considered part of the final assembly of a rifle? I have just never been able to get a trigger pull out of an LPK that is as smooth as one from a factory built rifle (be the rifle a Colt, Daniel Defense, Smith, or even DPMS).

    I am fully ready to believe that there is a wide range of differences concerning quality in LPKs (I have seen some first hand), I am just trying to wrap my brain around what they are.
    Forged?

    Cast, turned, wound and stamped but there are ZERO forged parts that live in a Colt lower receiver.

  3. #23
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    Quote Originally Posted by MK18Pilot View Post
    Forged?

    Cast, turned, wound and stamped but there are ZERO forged parts that live in a Colt lower receiver.
    Not claiming there are, just supposing. I'm obviously the un-knowledgeable here hence my questions. So what makes a cast fire control group found in a Colt lower better than the one found in a DPMS LPK? Are the DPMS fire control parts MIM'ed in the back of a whorehouse in Bangkok? Are the two castings supplied to the various manufacturers by the same supplier but Colt takes the time to anneal them and then heat treat them to spec? I really don't know but am interested.

    With the infamous list, it is pretty straight forward, the Colt's barrel is made of this superior steel, has been MP tested, and a few other things that make it superior to the DPMS. And while the "list" has ruffled more than a few feathers, it has made those who take the time to understand it, more knowledgeable shooters. With LPKs the whole issue is more nebulous. What makes a Colt LPK better?
    “The ruling class doesn’t care about public safety. Having made it very difficult for States and localities to police themselves, having left ordinary citizens with no choice but to protect themselves as best they can, they now try to take our guns away. In fact they blame us and our guns for crime. This is so wrong that it cannot be an honest mistake.” – former U.S. Sen. Malcolm Wallop (R-Wy.)

  4. #24
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    DD= outstanding, though I've heard of some missing parts, not my experience though. I've used DPMS as well and not disappointed, didn't. Keep the DPMS hammer and trigger though.

  5. #25
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    PSA gets my vote, they offer one of the better triggers of the standard part kits.

    They just need to work on customer service and shipping turn around.

  6. #26
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    I just ordered a bargain-basement no-name "bag-o-parts" lpk on gunbroker for $44. Came with a Hogue grip.

    No info on who the manufacturer is. The takedown pins are rough and crappy and...pitted...or something...on the heads, but other than that the whole thing went together perfectly, and it actually has the best trigger pull out of all the lpk's stock triggers I've ever seen!

    Who knows why. It's as smooth as the ones I've dremel-polished. I don't even want to touch it. I function tested it 200 rounds, works flawlessly.

  7. #27
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    I've had three LPKs and installed two of them. The first LPK came with my "Post-Pre-Ban" Colt Competition HBar I bought about twenty years ago. It worked well although the pull of stock trigger, while better than most stock AR triggers, was still rough. All the controls worked every time and nothing worked loose and the finish held up to the years of use. Never tried MagPuls in my Colt but GI mags all locked in with no trouble and dropped free.

    The second LPK came from Armalite without a FCG. A Geisselle FCG was added. It too has been trouble free, always works and both GI and MagPul magazines lock into place and drop free. I like the extra tab on the bolt release. It makes locking the bolt back sans mag easier. The fly in the ointment was the finish on the mag button. It doesn't hinder or improve function, but it was a bit disconcerting to wear the finish off the ridges during installation!

    The third LPK came with my PSA rifle kit, complete with trigger. It too functions fine and GI & MagPul mags lock in and drop free. Again, the finish on the mag button is not very durable but that doesn't affect function. Trigger was very rough at first but has since smoothed out quite a bit. It's a single stage with lots of creep and feels like a rolling break, almost like a very short DA. I don't like the pull, but it is predictable and feels the same with each break. Only a few hundred rounds have been put through this lower. I'm going to leave this trigger in and see how it does in the long term, but a big part of me wants to just replace it with a Geisselle and move on.

    All three LPKs have given good service and other than the problem with the finish of the mag buttons supplied with the Armalite & PSA LPKs, have no complaints. I would like to note the Armalite & PSA mag buttons look like they use the same black finish
    INSIDE PLAN OF BOX
    1. ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
    2. MATCH SCRATCHES ON MATCH-BOX
    3. MATCH LIGHTS FUSE TO TNT
    4. BOOM!
    5. HA-HA!!

    -WILE E. COYOTE, AUTHOR OF "EVERYTHING I NEEDED TO KNOW IN LIFE, I LEARNED FROM GOLDBERG & MURPHY"

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  8. #28
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    I'm sort of with Cobra66 on LPK's. I've no problem accepting the notion that some are "better" than others.

    But it would be great for those of us who know less about LPK's to know what "better" actually means. For instance, it'd help to see a sticky or some kind of a bulleted list telling us what kinds of things to look for in quality LPK. Are there any measurable differences to look for, or visual differences you can tell just by close inspection, that would give clues to an LPK's quality level?

  9. #29
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    Quote Originally Posted by maximus83 View Post
    For instance, it'd help to see a sticky or some kind of a bulleted list telling us what kinds of things to look for in quality LPK. Are there any measurable differences to look for, or visual differences you can tell just by close inspection, that would give clues to an LPK's quality level?
    I think that was QuietShooter's hope with this thread. It is a good idea.

    I bought my LPK from G&R because I trust Grant. He knows what he is doing, buying and selling and I just don't.
    "Real men have always needed to know what time it is so they are at the airfield on time, pumping rounds into savages at the right time, etc. Being able to see such in the dark while light weights were comfy in bed without using a light required luminous material." -Originally Posted by ramairthree

  10. #30
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    I like my Spike's parts kit, everything was in order, no problems at all. I'll be buying one of theirs again.

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