Apologize if this has been discussed I didn’t find anything in the search. I have an Arsenal SLR 107cr and want to put an slr Rifleworks mlock lower handguard on it. The one that is specifically made for the cr only comes to the front site gas block lengthwise. I would like the rail to extend out a little further as my gun is cut and pinned to 14.5. Has anyone put one of their rails on a SLR cr? Anyone know if their other lengths will fit without modification? Thanks!