REVIEW: LAR Grizzly OPS-4 Upper Receiver

[Steve_Morrison]

2 reasons for that:

2: Staking is typically so you can not remove the gas key. A bit of loctite does the same job but not as permanently. We did not stake the gas key with the upgrade either because we gave this rifle away and the person who won it may want to reconfigure things.

I saw one of these complete guns in my shop earlier this week under evaluation for an LE agency. I think they are fine for casual use, but the sample we had here lacks some important details to be considered for serious applications.

Staking is done to keep the carrier key screws from backing out and maintain the seal between the key and the bolt carrier, which is pretty important in that it enables the gun to function correctly. The T&E rifle here was not staked.