See the following link for NRA Institute for Legislative Action recommendations on this issue:
http://www.nraila.org/Legislation/Read.aspx?ID=3151If so inspired:
1.) Copy to CLIPBOARD the NRA ILA pre-written letter at the bottom of the link above
2.) Navigate through the link on the ILA page to the OSHA comment page
3.) Navigate to the COMMENT section of the OSHA page
4.) Navigate to page 18 of 22 (where the referenced RULE is available for comment)
5.) Fill in the requisite information
6.) PASTE the ILA letter
7.) "Word smith" the letter for address format
8.) Add your name at the bottom
9.) Depress SUBMIT