DPMS does indeed make a Pather carbine. http://www.dpmsinc.com/PANTHER-CARBINE-16-RFA3_ep_212-1.html. If this is the rifle you have it takes a carbine length handguard.
For sale is one Midway large range bag. Complete with 2 pistol rugs, stage bag with dividers, brass bag, and shoulder strap. This bag has never been used, it's just too big for my needs. $45.00 firm in Gonzales.
I'm not saying anything bad about them because I've never dealt with them but here is a thread from 1911 forums, for what it's worth. The following is a picture of the gun in question.
http://forums.1911forum.com/showthread.php?t=394592&highlight=barking+irons
Try Professional Glass Works, (formally Ascension Glass) he's in the Gonzales/Prairieville area. I'v been using them for years and always good work. He'll go to your house or will meet you wherever you want. His name is Wade Utrera, phone 225-253-6599