Off center contact between the op rod and piston imparts stresses on the op rod that can result in distortion and have a detrimental effect on accuracy. The rifle may still function adequately, but not perfectly. Not a big issue in a battle rifle. It is however an issue in a match grade rifle.
Decided to do Tony Ben's Tilt Test for the heck of it. Bored I guess. The rifle passed both tests, but in the process I noticed that the op rod and piston are not perfectly aligned. They're off maybe a 1/16 of an inch. Both the op rod and piston function fine as best I can tell. There is no apparent wear on the op rod or the guide. From what I'm reading here, this doesn't sound like it's a major issue. Any thoughts?
2 weeks ago when I picked up my newly re-barreled Springfield at LRB Arms in Floral Park NY I asked the M14 Armorer there this same question. He said it is more important to have perfect alignment with the op rod tube and the guide than where the tube meets the piston.
He installed a good condition GI op rod and a new guide for me.
Sure enough my tube is perfectly centered in the op rod guide and slightly off of alignment with the piston. Makes sense to me. And she shoots like a new rifle.
Thinking of buying one of FA's kits. Anyone have any experience with these with a USGI barrel? They claim the parts conditions are "excellent." I'm trying to decide if I want the GI barrel or Criterion. If the GI barrels are shot-out, it would be a much easier decision. Anyone have thoughts on...
I got a James River Armory "standard" coming. By" Standard" I mean 22'' GI walnut with metal butt plate and flash suppressor . I am not sure any of the terms are correct lingo. I am looking to scope it but don't want a Scout setup. I looked at "CAnaidianScopeMount CASM . Any drawbacks that I...
Hey Guys, I'm looking for a Sage M14ALCS chassis for my M1A and I can't seem to find one anywhere. I even reached out to Sage but its been months with no reply. Anyone know where I can find one or anyone selling a used one?
I want to thank Forceman for selling me his SEI Adapter with a NM Front Site.
I mounted his SEI Adapter and my OSS Mount today. Here are a few pictures of my Double Lugged Smith Ent. M21 built by Clint Fowler back in the late 80s with all NOS parts.
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