AR Sponsor
Posted: 11/26/2004 6:15:37 PM EDT
| Are barrels generally chrome-lined after the gas ports are drilled, thus chroming the gas port as well as the bore? I ask because I am interested in cutting a 20" barrel down to 16.5" and opening the gas port up to .110" for optimal reliability. If the gas ports are chromed with the barrels, and I then open my gas port up (removing the chrome lining) will my gas port suffer any detrimental effects (my primary concern would be faster port erosion)? |
I would be using the factory FSB, ala Dissipator. |
great build... i thought about this a lot myself... let me know how it turns out! |
|
The port is drilled after chrome lining. A cobalt drill is used to drill the gas port. If you feed very slowly, you won't chip the chrome or flake it away. Use a NEW cobalt drill bit. I don't know if I would go straight to .110" Start a bit smaller and see if it locks your bolt to the rear after firing one shot through the mag. |
The problem is I don't have the tooling to do it myself, so I'll likely be farming it out to ADCO. Maybe they will test it for reliability and drill as needed. For those of you using 20" barrels cut to 16", what do you find to be a reliable gas port diameter? |
This would be a 16" barrel with a rifle length gas system. The dwell time would be significantly reduced, requiring more gas to reliably operate the weapon. |
AR Sponsor