This is a discussion on Stock ferrule clearance within the Gunsmithing forums, part of the M14 M1A Forum category; I have a question. I have no clearance between the stock ferrule and the plate that butts up against the gas cylinder. I was wondering ...
I have a question. I have no clearance between the stock ferrule and the plate that butts up against the gas cylinder. I was wondering if I could mic the depth front to back of the ferrule and take .010 off the back side by pushing it back and forth on fine sand paper taped to a flat piece of glass, and remove a like amount from the front horseshoe on the stock? If not, does anybody have any better ideas? I also can't get that @#$%$ op rod out too!
The part on the barrel/gas cylinder is called the front band.
No clearance is better than too much. You should be able to slide a business card in there. If you actually see wear on the face of the ferrule, I would slightly shim the gas cylinder, assuming your lock isn't too tight.
If you don't see any finish wear, then just put a dab of grease on it.
As for the oprod, tape up a large, flat head screwdriver. Insert it in between the receiver and the oprod block. Gently pry the top of the oprod block away from the receiver while tapping up on it with a synthetic or wood mallet.
The dismount notch in the receiver rail usually has a slight "shelf" to it, making new oprods difficult to remove.
Binding between the ferrule and barrel band will cause inaccuracy. There should be about .010" clearance between them. Even with clearance, grease should be applied between the lip of the band and the bottom of the ferrule. This allows free movement of the band to recover from recoil and torque forces encountered during the firing cycle.
Well, I went ahead and glued the ferrule to the stock, hogged it out to NM specs, relieved the contact between the gas cylinder and stock, shimmed the GC, still has contact. I will try it and see how it shoots, and then maybe remedy the situation with glass bedding later on down the road.
A 10 ring is 3 moa. Any M1A will do that, even in a cheap polymer stock. You need to worry about the guys holding the X ring, which is about 1.5 moa.
How was the front band clearance with the original gas cylinder?
As far as I know. If it accidentally shoots better than I fear, I will shoot it at the CMP EIC at OKC April 6th. I am going to take it to the range tomorrow after work or Friday and see how it does. I still have a couple of weeks to bed it if it doesn't.