Can a Stainless Steel AR-15 be made?

[Reinz]

That is kind of my understanding. If the mix is different enough it isn't an issue.

This was true until better synthetic lube became available.

Same goes for all SS. The Auto Mags, Detonics, and Randals would only run properly and over time if certain synthetic lube was used.

Of course this was in the 70s and 80s when SS was just starting with autos, so there was a learning curve.

 

[ROGER4314]

the stainless alloys need to differ slightly between the frame and slide. Identical alloys will gall . Unlike will slide.

That is the correct answer! In industry, we used lots of SS parts so we slathered them up with anti-sieze compounds. Even so, when tightening or loosening the parts, some would suddenly lock up. The only option was to cut them apart! Damage from galling is profound.

I've had several AR-15's with SS barrels and my M1 Garand rifles have Hart SS 6 groove match barrels (Parkerized).

Pistol slides and frames have slightly different SS alloys.

Flash