Alex,

I recently bought a Stevens model 5100, a forerunner of the 311, with a Tenite stock. It's in 16 ga. and I intend to make it a project gun.

My point in posting this is, when it arrived at my FFL dealer, the stock was completely broken off. USPS at their best. The bolt attaching the stock to the receiver is maybe a 5/16 diameter and aluminum, or some other very soft metal.

Baring damage from the sun or abrasion as others have mentioned, the bolt will break before the plastic.

Milton