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Texdave

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About Texdave

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    League City, TX

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  1. jbntex, I was getting back to you with some info. I did get a #29 (.1360) and a #28 (.1405) drill rods. I verified their size with calipers. I also wanted to relay the complete info that are stamped on the barrels that I gauged and will be discussing. Both barrels are short light commando contour and stamped MFR26978-MF3604. So I guess they are made by General Dynamics as have been stated. The dates are different. One barrel that has the E4 Fat Gas system has the date of 11/02. The other barrel has the slim E3 / E4 gas system and it is dated 08/90. I have shot this barrel with the slim gas system over the years and it always runs 100% with LC ammunition. So I made sure I cleaned out both barrel’s gas ports with first the factory combo tool / reamer and then followed by a close sized drill bit as Aaron suggested. Both barrel’s ports took the #29 (.1360) and it did seem close to fit. I of course did try the #28 (.1405) and it would not fit into either barrel’s gas port. So I am going to see if the port is slightly larger than the #29 (.1360) by slowing turning down a #28 (.1405) and of course keep on checking the size with calipers and see if it is somewhere between the #28 and #29. I know I have still incomplete info for you but closer than before and also on two G/D barrels instead of just one. I am almost positive the port is closer to the (.1360) than the (.1405) but we will see. And I wanted to ensure you that both ports did seem the same and so are surely larger than (.1250) so I would at least say #29 (.1360) would be close and so also quite a bit larger than what is the current port size you stated that is in your G/D barrel. It is also interesting that you say your new US Ord barrels are ported at (.140). and if the US Ord barrels and gas systems are the same otherwise I wonder if they increased the port size to increase the gas and maybe the reliability? I will report back when I get the chance to turn down the #28 and see what I find. I hope helps a little more. Take care, Texdave
  2. Jbntex, I have what appears to be the same E4 Fat Gas system barrel with the exact manufacture 26978 Cage code only with a manufacture date of 11/02. Before I go any further I wanted to tell you that I try and read every thing you post because of just how detailed you are and the fact that you are so very unselfish and try and help others in this community with your extensive knowledge just as Aaron does as well. I greatly appreciate you both !! So I pulled this E4 barrel out this am after I read your post. Also to note this is still an unfired barrel so cannot comment on performance. My go to commando barrel is the E4 barrel with the slim E3 gas system. Because I am short of time this am I did not post any photos but did take some. I can tell you that my gas port on this barrel swallowed a 0.125 (1/8”) drill bit shank without issue and it also took the E4 combo tool’s reamer as Aaron suggested to fully inserted status. I also tried a 0.140 but it did not go but was just a used an old drill bit. The port size in my barrel does seem larger than the 0.125 but not sure yet on the 0.140? I need to order a #28,29,30 drill rods so I can closely determine the port size. I know I only have limited info just yet but wanted you to know if your barrel’s gas port is sized at only 0.098 then it seems way undersized compared to the gas port in my barrel dated 11/02 ? I wonder if G/D changed the port size between 1987 and 2002? Please let me know if you have any questions. I will get an accurate port size measurement and let you know what I find. I hope some of the info helped in this quick reply. Take my M60 Brother !!
  3. https://lbtinc.com/products/261 Here you go....I hope the link works !!!!!! I have used these on my M60 for over 10 years and they are good to go like all the kit LBT makes....and they work on all variants of the M60 feed hangar that I know of; E1, E3, E4, E6. I hope that helps. Safe shooting of your Pig !!! Take care, David A.
  4. Sounds like a deal to me Aaron !! I will take two, one of each, XM21 & XM23. I had sent a text to you about this as well. Please send total amount and I will send the funds to you in the usual manner. Thank you once again Sir !!!
  5. StrangeRanger, sent a PM to you...check your inbox....
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