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Posted: 5/6/2008 8:25:30 PM EDT
| I want a dissipator with a 14.5" barrel but I want to use a DCM free float tube. What do I need to do if I order a 14.5" barrel as far as pinning the flash sup? I bought a DCM free float tube and I think I can make that part of it work with the gas system and all over the tube, but I need to be able to slide the front sight on. I need to do that with the flash suppressor that is not on the barrel but if I order the 14.5" barrel it will come perm attached. Any help would be appreciated. Thanks |
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great idea, I like how you think! I was in a similar mood, but I went with an adco cruiser upper which uses a slightly heavy barre l( for me anyway!) and decided not to free float. (It has ALWAYS been my dream to build an IDF SDM clone out of a NM RRA A2. I can't stand the thought of putting an acog that high up on a non-FF rifle!) |
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There is very little room under a DCM tube. I really doubt you'll be able to get the gas block under the tube. You also may find that you have to alter hadguards to make them fit a FF tube. I have tried to put two piece non-FF handguards on a DCM tube and they don't work. Regular plastic handguards will need some fitting. As for the rest, you should order the components unassembled. Then have someone put it together for you, putting the FH on last. That way if if doesn't work, you'll have some options. |
| The FF tube just came in. It is relieved on top almost wide enough for a gas block to protrude. My plan was to widen the slot to make it big enough to get the gas block into place on the tube from inside and then slide the tube/gas block over the barrel. I then planned to drill 2 holes where the taper pins are and pin the gas block to the barrel with the float tube in place. |
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Most people who do something like you're wanting do it with a 20 inch cut down to 16 and get the gas port opened up. Not rocket science, people like ADCO get it right very time, and there's no fooling with the carbine length gas block. Not sure if that would work to do that down to 14.5, though, you'dd have to ask. Be sure to clearance more than you figure around that tube if you're going to use a tight sling, those tubes deflect more than you think they do. Ask any Highpower shooter. Tom |
Even if the steel tube doesn't flex it is attached to an aluminum upper. ETA: The barrel is a steel tube also, a thicker steel tube than a handguard, and the whole point of using a free float tube is to prevent the barrel from being flexed by a tight shooting sling. |
Yup. Get a good leather sling, get it good and tight, and go prone, you'll see it flex. I have yet to see one that didn't. Some more than others, wether it's the tube or at the tube/reciever junction. Another thing to think about, the tighter the clearance between the tube and barrel/gas block, the easier it is for something that gets inside there to cause issues. Tom |
| Am I better off forgetting about using the tube and just getting a regular dissipator barrel or should I get a rifle length barrel cut off and rejetted so to speak? Since I am buying a new forward assembly I want to do it right th first time. Probably cheaper to buy the correct barrel in the correct configuration. |
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