View Full Version : M1A reciever issue

May 15, 2011, 12:10 PM
Hello, I'm new here so please bear with me if I make any mistakes.
I purchased an M1a Scout/squad, on Jan. 6 of this year. With less than 100 rounds through it, I noticed an issue I am concerned about. When I retract the op-rod and bolt, the "hump" on the top front of the bolt contacts the top of the receiver, under the stripper clip guide. If I have an empty magazine in the rifle, the contact is more severe, I really have to pull it back quite firmly to get it to cycle all the way back. If I insert a loaded magazine, even with only 3 or 4 cartridges, with the bolt closed, the upward pressure of the cartridges on the underside of the bolt is severe enough that I cannot manually cycle the bolt all the way back. I returned the gun to the dealer, and their gunsmith polished down the wear mark on the back of the hump and radiused the underside of the top of the receiver . There is still slight contact if I have no mag in place, heavier contact with an empty mag in place, and with a loaded mag in place, I still cannot cycle the bolt all the way back to chamber a round. If I insert the mag with the bolt locked open, I can then chamber a round and the rifle seems to function properly.

Is this contact in this area normal? When the gun fires, the bolt is driven back quite rapidly, this contact would seem to be severe. I am concerned that over time this contact may weaken the top of the receiver or the roller lug on the bolt that the op-rod pushes against, or affect other areas of the mechanism.
After calling them, the rifle is now on its way back to SA for evaluation, they paid the shipping.
Any insight you folks could offer will be greatly appreciated.

James K
May 15, 2011, 03:02 PM
There is something amiss but I can't say what without looking at the gun. I suggest calling Springfield Armory, Inc., and let them know the problem. They will probably advise you to return the rifle and MIGHT even pick up the shipping cost.

(Of course if it is not from SA, Inc., and is an no-name clone, then your gunsmith may be the only choice.)


May 15, 2011, 05:01 PM
I think he said it's already on its way to them.

No, it's not normal. The usual cause, I think, is the guide tab on the op-rod handle that rides in the slot on the right side of the receiver being damaged or defective or worn out. That means the vertical position of the op-rod handle is not properly constrained by the upper surface of the slot. This allows pressure from the the magazine follower (when the magazine is in place) or loaded rounds to push the back end of the op rod up via the bolt. A little of that is normal, but with the faulty tab, it is allowed to push up too high. If you have rounds in the magazine it gets worse mostly because the magazine spring is compressed more and is pushing up harder.

SA will fix it.