No, it will not come with the detent and spring.
Seekins Precision does not provide the weight of their Safety Selector Kit. I would recommend contacting the manufacturer directly for more information.
The Seekins Precision SP Safety Selector Kit will fit both AR15 and AR10/LR308 platform rifles as they use interchangeable safety selectors.
The manufacturer does not state the Allen Wrench size needed for the Seekins Precision SP Safety Selector Kit. I recommend you contact the manufacturer or email us at techsales@opticsplanet.com so we can help.
Yes. AR10's and AR15's safety selectors are typically compatible between the two. So more than likely the Seekins Precision SP Safety Selector Kit will work for your AR10.
Yes. AR10's and AR15's safety selectors are typically compatible between the two. So more than likely the Seekins Precision SP Safety Selector Kit will work for your AR10.