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12.5" 5.56 CLE 3R SBR/pistol barrel- 1/2-28
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Items Remaining:out of stock

I have retired and am only selling leftover stock.

The 5.56 CLE chamber is a little more accurate than the Wylde when ammo is loaded to mag length. None of the military ammo (55, 62fmj)is very accurate in any barrel but the 77gr Razor core. S&B 77gr and Black Hills MK262 shoots pretty well. 62gr Gold dots and other handloads can shoot 1/2" MOA.  24.7gr H335 with 62gr Gold dots 2.27" is a known good load.

Many in the  spec ops think the M4 14.5 barrels are too long for use with a suppressor.  They also think they lose too much velocity with the MK18 10" barrels. These 12.5" barrels were our answer, and our second most popular length for 10 years. These barrels have a mid gas system to help cut down on problems associated with carbine length gas systems and suppressors.

For pistol or legal SBR use only. Builder is responsible for building a legal firearm.

For NFA -SBR critical measurement use 13" when filling out form.
All barrels ship flat rate $15

  • Chamber: 5.56 CLE (compass lake eng.) stamped "5.56 CLE"
  • Profile: lightweight- .700/.750/.700
  • Fluted: No
  • Barrel Length: 12.5"
  • Twist Rate: 1:8- Hybrid 3R rifling
  • Gas System: MID  Length
  • Diameter at Gas Port: .750" x1.1" long boss---.081" port unless you direct otherwise on order.
  • Muzzle Thread Pitch: 1/2-28
  • Material: 4150 Chrome Moly Vanadium Steel
  • Finish: Melonite
  • Process: Button Rifled
  • Barrel Lining: Melonite
  • Barrel Extension: M4
  • Assembly: Stripped
  • Weight: 1lb 7oz
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    DO NOT USE  bullets that are larger than .277" in these 6.8 barrels, 99.9% of all .270/6.8 bullets made are .277" diameter.  The chambers were designed for .277" bullets and all 6.8 barrels have a .277" bore so bullets larger than .277" will cause excess pressure and increased copper fouling.  It seems some Cavity Back bullets are .278" and on top of that they are solid copper so check the diameter of the bullets before using them.


     AR Performance (ARP)

    Hi performance 5.56 & 6.8 SPC barrels and parts since 2007

    The best way to contact is by email

    Phone: 786-782-8209  8am-5pm eastern time  M- Fri only
    Sorry we do not export anything and do not have a storefront. Everything must be purchased online.

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