MkI Bipod - plum colored mounting ring

[hatrick]

Since we’re talking bipods… what is the ring on the left side of plum colored piece for? Always wondered that since the sling mounting is below.

[browningautorifle]

the ring on the left side

Have you seen a sling with it's hooks? They hook into those. The other hooks into a loop on the butt.

https://www.milsurps.com/showthread.php?t=38139

[hatrick]

Doesn’t the sling hook attach to the lower ring? That’s where I’ve always attached mine.

[Bruce_in_Oz]

Heat-treated alloy steels are prone to this "purple" caper..

Something to do with the surface crystal structure. The "purple / crimson"' is a"ceramic" skin; hard and with a structure that , like traditional "blue / brown", holds oil to prevent corrosion.

If you GENTLY grit-blast the offending colour away and re-blue (proper hot-bath or slow steam chamber, it will turn a nice "matte" black.

You see components of various "Eastern Bloc" firearms that sport this colouration. It does the job. These are tools of the "trade", NOT "fashion models.".