The tri rail length isn't the problem.
To test your stock... And evryone should try this, usgi, or poly stock.
The gas assembly must sit tight against the gas system/front band locating surface. Once seated if gas lock tightens past 6oclock, we shim between this 90degree shoulder and the gas system.
At this point, a 1/32 drill rod is used to confirm barrel to cylinder gas port alignment by passing the drill rod thru the hole on bottom of gas system. Drill rod should pass through into barrel. It's easier with piston removed and also check to b sure spindle valve on side of cylinderis in the open or vertical position.
Once all this is done try and install the stock. If stock does not fit.... The stock is too long at the ferrule.
For ALL m14 stocks, wood, fiberglass and polyplastic, the stock should put NO forward pressure against the gas system. U.S. Military armorers specs call for a space of 15thou between gas band plate and stock ferrule. If this gap is not present, the stock ferrule becomes a recoil surface, increasing shooters felt recoil AND affecting potential accuracy
To test your stock... And evryone should try this, usgi, or poly stock.
The gas assembly must sit tight against the gas system/front band locating surface. Once seated if gas lock tightens past 6oclock, we shim between this 90degree shoulder and the gas system.
At this point, a 1/32 drill rod is used to confirm barrel to cylinder gas port alignment by passing the drill rod thru the hole on bottom of gas system. Drill rod should pass through into barrel. It's easier with piston removed and also check to b sure spindle valve on side of cylinderis in the open or vertical position.
Once all this is done try and install the stock. If stock does not fit.... The stock is too long at the ferrule.
For ALL m14 stocks, wood, fiberglass and polyplastic, the stock should put NO forward pressure against the gas system. U.S. Military armorers specs call for a space of 15thou between gas band plate and stock ferrule. If this gap is not present, the stock ferrule becomes a recoil surface, increasing shooters felt recoil AND affecting potential accuracy
