+1 with what others are saying. I wouldn't cut the barrel. I think for what you explained which doesn't sound like any significant hiking distances 11-12 lbs you'll be fine. Tell ya what I did one time...kinda elementary but, I cut some rebar taped pieces to the gun until I got the weight I had in question and went for a long...I mean long (all be it in circles) hike> This helped me decide yes or no on that particular weight. Worked for me. ps-if you don't have rebar use something else...piece a pipe, lead shot, sinker weights etc.