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Thread: BCG questions and options

  1. #21
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    I have a Sionics, Daniel Defense and Tool Craft bcg. The Sionics is my favorite because of the np3 coating.

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  2. #22
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    Can anyone explain why NP3 is better (all else being equal) than nitriding?

  3. #23
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    For good, bad, or indifferent, Colt is the gold standard. One may argue that FN is equivalent for some, but it may take a deeper look into things. A contractor, such as Toolcraft and others may be acceptable to most, but that does not make it a standard. Many companies may make a product that may work as well, that does not make them a standard. There's a few things that may be more or less preferable., it just depends.
    Coatings are a popular topic. One may say that coating "a" is better than "b" as an option. They may have a valid point, or they may not. If you look at the attributes and negatives that they could deliver there may be some things that could stand out. A proper NP3 process may work best for some, others may benefit from another option, like proper hard chrome, or possibly something else?
    Some users would not benefit with either over a standard finish, how could they justify the possible added cost? In use, function matters, properly processed components may meet or exceed those values. How much extra cost would or could be added for the possible advantage?
    I do tend to prefer hard chrome when done properly in function. That does not mean it suits every use or other options.

  4. #24
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    NP3 has a lower friction coefficient, and because of the impregnated Teflon fouling is much less likely to get caked on.

    I'm also not sure salt bath nitride is a good treatment for a bolt or bolt carrier, the case hardened finish might not be the best for a part that slams to a stop against the barrel extension. You probably want more ductile strength and nitride might compromise that. I could be wrong, we'll see if any metallurgy experts chime in.

  5. #25
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    I could only speculate based on things I've seen. If given an estimated round count of sample of carriers over the years, there's some things that stand out.
    Does an end user need the extra cost? Will that carrier see 5K rounds or a 100K in its use?
    Does nitriding make sense? It may for some, but maybe not others. Just nitriding a component does not make it automatically better, it just recieved that treatment, for good or bad.

  6. #26
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    The friction coefficient of a surface treatment is small beans, when compared to the manufacturing process as a whole in function. Sure, some can be beneficial to others, but the base part is more of a concern.

  7. #27
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    Tom, I appreciate that bit of input. I'm honestly fine with a standard coating. I just want the best.

    Iraqguns, what was the stripped carrier you sold me a month or two back?



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    It's better to be thought a fool than to open your mouth and remove all doubt.

  8. #28
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    Mis-post
    Last edited by Steve-0-; 12-16-15 at 02:10.
    "your AR is shit, change my mind" - Will Larson

    I make work horses, not show ponies.

  9. #29
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    Quote Originally Posted by The FNG View Post
    Tom, I appreciate that bit of input. I'm honestly fine with a standard coating. I just want the best.

    Iraqguns, what was the stripped carrier you sold me a month or two back?



    Sent from my iPhone using Tapatalk
    Lets be real here, all of the top guys, including us use the correct tested compenents for a BCG. Coatings like NP3 simply make life easier when cleaning and our guns seem to run longer when deprived of lube. If its wirth the extra $20-$30 bucks then cool, order one. you wont be disapointed. If you strive for a mainstream stamp on another generic BCG, the order that one.
    Last edited by Steve-0-; 12-16-15 at 02:16.
    "your AR is shit, change my mind" - Will Larson

    I make work horses, not show ponies.

  10. #30
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    I run a Fathom Arms QPQ'ed BCG. This last weekend, I put 1500+ rounds suppressed on it, using Wolf, without cleaning it, and without adding lube. It was initially lightly lubed with MPRO7 LPX.








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