Unitizing Gas System

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Tehoke01

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I've read Skullboy's M14 FAQ on unitizing the M14 Gas system and I know he explains where to weld, but can any one show with a picture, exactly where to place the tack welds?

Also with all oof the recoil are you really better off using the tap/screw and weld technique or are simple tack welds good enough?
 
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Tack welds should be more then enough. If your gas system is tight and there is no movement then you shouldn't have any problems. Personally, I don't think it matters where the spot welds are...just stick em where it looks best. You could try 9 o'clock, 12 o'clock, and 3 o'clock on the top part of the gas system, and stick a little weld at 6 o'clock on the bottom part. Just a suggestion...
 
Unless you are specifically going to use your M305 for competition... I wouldn't bother unitizing. Shimming would be more than enough to tighten groups for most applications. Just my $0.02

Regards,
 
Boomer 686 is right. Unless you compete with you M305 on a regular basis, just shim the whole system tight. Me ? I'm anal and I like to have my systems welded up.

I recommemended 10, 2, and 6 o'clock. Just a light tack is all it takes. Don't file off too much of the welded material during the cleanup process otherwise you might end up breaking the front band off the gas cylinder. Done that twice, I'm afraid.

Yeah, only weld things up when you start you competition game. For you Service Rifle / conditions types, just buy an AR15 and get it over with. Not much tweaking to make an AR competitive for Service Conditions shooting.

Cheers,
Barney
 
Tehoke01 said:
Also with all of the recoil are you really better off using the tap/screw and weld technique or are simple tack welds good enough?
Click to expand...

If you must unitise, go with the welding method.

The Screw method is a pain in the a$$ as you are drilling and tapping in a small area and it is an awkward part to work on.You also use Red Loc-Tite on the screws.

The welding method is tried and true, and will hold up (if done properly) for the life of the gas system/rifle.

Just remember that USGI cylinders are Stainless Steel, and Norinco cylinders are chro-moly.Your welder needs to know this.

SKBY.
 
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