20" Pencil Barrel - AR-15 / XM16E1 / M16 / M16A1

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This "Pencil" profile Chrome lined barrel is the same size and finish as the original AR-15, XM16E1,  M16 and M16A1 models.

If you are looking for a Military quality Pencil profile 20" barrel for your Retro build.. or want a Light Weight Barrel for your modern build then this is one of the nicest barrels available. Fully Chrome Lined and choice of twist rate.


Full Assembly Specifications:

  • Twist Rate Choice: 1:7 .. 1:12 .. 1:14
  • 1:7 is Nitride finished (Currently Sold Out)
  • 1:12 & 1:14 are Chrome lined and Phosphate finished
  • .625 at the FSB/Gas Block location
  • A1 Round Front Sight Post and assembly
  • Early Flat Style Straight "Slip Ring" (Later Delta Ring available on request)
  • Gas Tube & Pin
  • Barrel Shim (just in case it is needed for Barrel Nut timing, taper pins do not need to be removed to install)
  • 1 lbs. 11 oz.

 1:7: back ordered and expected June 2020


Notes on Options:

Twist rate mostly affects what types of bullets you can use and your level of Purism:

  • 1:14 is what ArmaLite started with in the late 50's and were used for the first 601's. Replaced by 1:12 in about 1962.
  • 1:12 what was issued in all AR15 variants from 1962-1984 (Marines) and 1987 by the US Army. Use only 55gr and some 62gr bullets.




  • 5
    20" pencil barrel

    Posted by Dennis Cobb on 25th Aug 2020

    Excellent barrel, they can be difficult to get up with but then again they are not Amazon. Once I spoke to Victor on the phone I understood how the company works and all was fine. Got the barrel and I could not be more pleased. Thank You!

  • 5
    barrel review

    Posted by robert p shanahan on 20th Jun 2020

    glad I bought my barrel from retro rifles. just what I was looking for. great job. thanks victor!!

  • 5
    New barrel

    Posted by Robert shanahan on 17th Jun 2020

    Worth the wait. Honest seller. Quality work. Thanks Victor.

  • 5
    New barrel

    Posted by robert shanahan on 15th Jun 2020

    worth the wait. Good seller. Good communication. Very happy, thanks Victor

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