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Thread: DPMS- What is left to do to make "battle worthy"

  1. #31
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    most of the issues people have with "unapproved" brands can be solved with a quality bolt carrier group.

  2. #32
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    The difference between the dimensions of .223 and 5.56 cartridge is negligible, while the neck and the leade of the 5.56 chamber is more generous. Those are the bits you ream.[/QUOTE]

    Ya is it really necessary? Ive never heard of that. learn somethin new everyday! lol

  3. #33
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    Necessary? Depends on what you want to do with your rifle. If its a plinker and you plan to feed it a diet of commercial ammo than no. A .223 chamber will be fine. If you have more heavy duty uses in mind, a correct 5.56 chamber is worth the effort. Mil spec 5.56 ammo runs at a higher pressure than .223 fodder, and Mil surp ammo is made with a tolerance to spec. Meaning an individual round may vary to a degree . A 5.56 chamber allows for this to a greater degree than a .223 chamber will. I will only run a 5.56 chamber on my guns, simply for the reason it's one less variable I need to worry about. I am not going to let a dirty gun give me feeding issues on a carbine meant for PD/HD etc.

    https://www.m4carbine.net/showthread.php?t=55149 Check out the sticky BTW
    Last edited by beauduke; 01-20-11 at 14:10. Reason: Added link for sticky

  4. #34
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    Guys I just added a Battle Comp 1.0 from Bravo Company. I have just read too much good things here to not do this thing right and get it. Please tell me that it wasn't stupid of me to spend 150 bucks on this thing. I felt like the muzzle rise reduction for follow up shots outweighed complete flash hiding. I believe the 1.0 is comparable to the A2, but every certain number of rounds it lets out a large flash from powder buildup. The only negative I could think of from a battle rifle perspective was: A. bad flash hiding capability B. If mud gets in the fine holes it won't work and would be hard to clean off C. I am betting it is loud??? Thanks!

  5. #35
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    Quote Originally Posted by walter34payton2002 View Post
    I have been doing some searching and some reading. I have come to the conclusion that I need to make certain modifications and upgrades to my DPMS AR 15, 16" bbl m4 style rifle with the goal of maximizing reliability. I thought by adding an m16 bcg by BCM that would go a long way. I am also thinking that while the barrel has a chrome chamber, the 1:9 twist barrel is only chrome moly, not chrome plated. As I have read here, you guys swear by the chrome plated 1:7 twist barrels. While I am comfortable with the 1:9 twist (I don't want to get into that debate I am good with it) I know that the chrome plating is a big deal. Also, I was not able to determine the necessity of changing to an H buffer. No one really knows if that is necessary to increase weight if you increase the weight of the bcg by way of adding an m16 carrier.

    So, to make this less confusing, the question is: What is recommended to make my DPMS "battle worthy" in the eyes of you very skilled and information-filled m4carbine members? Would you recommend just going with a chrome lined barrel? Adding an h buffer to my current rig? Going with a complete upper from bcm? Or, are my upgrades sufficient (BCM bolt carrier group, bcm large notch charging handle)? Is adding the h buffer a "no brainer" or is this a trial and error type of upgrade? I would like to know what I have left to do while I have a bit of cash now. MANY THANKS!!!
    I'm going to go out on a limb here and say that you'll probably be okay with the BCM BCG with the O-ring and extractor spring upgrade, getting the chamber reamed to make sure that it's 5.56 dimensions and changing to the heaviest buffer that will run with your weakest ammo. That and use quality magazines and copious amounts of lubrication. These items are important to the proper cycling and feeding of the rifle. It won't be sitting on the left side of "the Chart" but if you hit those areas the rifle should at least run. Chrome lining while desireable, IMO isn't required, barrel twist only makes your ammo selection a bit smaller, & 4140 steel will more than suffice. And stake your castle nut, it's probably rare that it works itself loose but it's cheap insurance.

  6. #36
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    I thought the external dimensions of BOTH cartridges were almost exactly the same, the .223 chamber just being a little shorter but thats it, the .223 chamber is just cut a little shorter. Oh and the headspace dimensions. The .223 chamber cant handle the higher pressures. Sooooo.... if the chamber cant handle the higher pressures, why would you cut your chamber to fit the 5.56? And does reaming the chamber allow for a higher pressure?

  7. #37
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    https://www.m4carbine.net/showthread.php?t=55149

    Read it. Recommend that you learn a bit about the terminology used to fully understand the differences between the two, but a general guide is that you can fire both 5.56 and .223 in a 5.56 NATO chamber, but you should not fire 5.56 in a .223 chamber.
    Last edited by Scorpion; 01-20-11 at 22:18. Reason: Added on.

  8. #38
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    Quote Originally Posted by Scorpion View Post
    https://www.m4carbine.net/showthread.php?t=55149

    Read it. Recommend that you learn a bit about the terminology used to fully understand the differences between the two, but a general guide is that you can fire both 5.56 and .223 in a 5.56 NATO chamber, but you should not fire 5.56 in a .223 chamber.
    LOL Thats what ive been saying the whole time! I asked why would you ream a .223 chamber in order to be able to accomodate 5.56...

  9. #39
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    Quote Originally Posted by BCmJUnKie View Post
    I thought the external dimensions of BOTH cartridges were almost exactly the same

    They are exactly the same. The difference is in the chamber dimensions and the pressures the cartridges are loaded to.
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  10. #40
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    K cool. Thanks everyone! Hey walterpeyton sorry for interupting your thread here man! Hey and good luck wit your rifle, listen to everyone an go with that BCM. You will NOT be disapointed!

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