Page 1 of 9 123 ... LastLast
Results 1 to 10 of 81

Thread: 16” midlength vs 20” rifle length bolt life

  1. #1
    Join Date
    Jan 2021
    Posts
    28
    Feedback Score
    0

    16” midlength vs 20” rifle length bolt life

    So the 16” mid length is supposed to have less parts wear compared to the carbine length gas system, but how does it compare to 20” rifle gas system for bolt life?

    I’m thinking of a Recce upper, and the extra velocity from 20” barrel isn’t gonna do too much, but wonder with the rifle gas system if it’s softer shooting and also less parts wear.

  2. #2
    Join Date
    May 2009
    Posts
    22
    Feedback Score
    0
    I think so.

    Years ago, when I built an AR for 3-gun matches, I went with an 18" rifle length gas tube.

    It shoots very soft



    NRA Life Member
    USPSA-IPSC

  3. #3
    Join Date
    Jan 2014
    Posts
    228
    Feedback Score
    0
    Do you really think you are going to shoot it enough for parts wear to be an issue?
    Mid length give you less recoil impulse than a carbine and a rifle length is even less.
    What are you looking to do with said rifle?
    You seem to looking at it from a parts wear issue and that is the backwards way to look at it.

  4. #4
    Join Date
    Jan 2019
    Posts
    1,228
    Feedback Score
    1 (100%)
    It all comes down to barrel length. The shorter the barrel, the more stress on the bolt. 20" will last indefinitely. Never heard of one breaking. You will eventually get headspace issues as with anything, but I've never heard of a lug or cam pin or anything like that actually breaking. This is evident in the many M16 parts kits running around that undoubtedly have a few too many rounds through them, but no cracked lugs or broken cam pins.

    On a 16"? It's going to vary by port size, ammo, and firing schedule. Tens of thousands of rounds is a safe bet, though. 10" is where things really start to go off the rails, but word on the street is that Colt has made some improvements that have yielded longer lifespans on SBRs.

  5. #5
    Join Date
    Dec 2015
    Location
    IN
    Posts
    2,032
    Feedback Score
    43 (100%)
    Where’s @Clint to chime in on the OPTIMUM system?

    Not sure if anyone has run a BRT barrel enough to see about wear on other components.
    “God doesn’t need your good works, but your neighbor does.” - Luther

  6. #6
    Join Date
    Oct 2011
    Location
    Utah
    Posts
    1,056
    Feedback Score
    0
    The further the gas port is from the chamber the lower the pressure is going to be. The port will be larger, but everything else being equal it will be less "violent" working the bolt. Whether that translates to actual wear differences in your given scenario is debatable.
    High speed floor buffer operator. For that low drag shine.

  7. #7
    Join Date
    Feb 2016
    Location
    North Alabama
    Posts
    3,381
    Feedback Score
    18 (100%)
    My rifle gas 18" is softer than a 20" rifle, but I cannot believe parts will show a significant wear/life span difference.

    Andy

  8. #8
    Join Date
    May 2013
    Location
    Wisco
    Posts
    1,177
    Feedback Score
    0
    Quote Originally Posted by AndyLate View Post
    I cannot believe parts will show a significant wear/life span difference.
    ^^^This. At some point you can split hairs, all day but the barrel length /gas system should be prioritized on how you want you use the rifle. The quality of the rifle and the parts used in it have more to do with the longevity and wear then the barrel length/gas system length do.
    I perfer black coffee in the morning, bourbon in evenings and spending money on sh*t I probably don't need.

  9. #9
    Join Date
    Jan 2019
    Posts
    1,228
    Feedback Score
    1 (100%)
    Quote Originally Posted by Hank6046 View Post
    ^^^This. At some point you can split hairs, all day but the barrel length /gas system should be prioritized on how you want you use the rifle. The quality of the rifle and the parts used in it have more to do with the longevity and wear then the barrel length/gas system length do.
    That depends. On a 20 inch, just about anything will likely last forever. Aero, PSA, Anderson, you name it. On a 16 inch, any of the aforementioned would likely all last a really long time, like probably longer than the barrel. There's always that chance you'll be the one to get the lemon, but most places will do right by you. To me, it comes down to what the gun is used for. If it's a home defense weapon, I think Colt is the logical best bang for your buck. If it's just recreational, though, there are some awfully decent bolts out there for insane prices (or at least there were).
    Last edited by okie; 04-13-21 at 17:55.

  10. #10
    Join Date
    Apr 2016
    Location
    Texas
    Posts
    804
    Feedback Score
    6 (100%)
    Almost no one reading this post will ever wear out a bolt or barrel.

Page 1 of 9 123 ... LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •