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Posted: 5/6/2005 4:11:41 PM EDT
| i have a 20inch a2 i want to cut to 16 and put a phantom on will i have to change the front sight /gas block to a diffrent type if i do this? |
| I don't know if cutting the barrel that close to the gas port will give enough pressure to operate the action reliably. If it was a good setup, manufacturers would make dissipators that way (cheaper) instead of with the lo-profile block and carbine length gas system. I could be wrong, though, and am planning on building a dissipator style rifle myself soon. Ill check back when some of the pros have weighed in. |
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Send it to ADCO, and they'll cut it down for you and open the gas port to make it operate properly. This is a popular option, and there is no mystery or rocket science behind it. In fact, DPMS makes a barrel already set up with the rifle system. Readily available and very reliable from MidwayUSA or direct from DPMS. Tom 
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i know but i got a unfired 20 inch a2 for 275 with bolt carrier and ch so i figured i would make one and get off cheaper 
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| I have cut down two 20" barrels to the" Dissy " config. using the original fsb. I removed the fsb and opened up the gas port hole a little at a time until the gun functioned and locked back properly. I finally ended up drilling the gas port holes with a #42 drill bit. Both of mine work fine. |
so you are telling me i can use 1 gas system and i dont have to mod a diffrent gas block to put under the handguard...in the car config...so it will function properley? |
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