My frames are dirt cheap, but maybe small kine flimsy. I buy an 8' length of 2x2" and have them (home depot/lowes) cut it in half. I then staple an edge of cardboard to one leg and take it to the range. My heavy duty stapler acts as a hammer to pound both legs into the holes and a pocketknife is used if trimming is needed. Once both legs are in, I staple the other edge of cardboard to the other leg.
Pistol frame is the same, except using the 1x4 wood cut to two lengths of 60" and heavy duty clips or C clamps hold it to the stand. Damn, I'm lazy hahaha. But hey, it works...
Also, I'll be at Koko Head showing someone how to use an AR on Sunday. I'm going to show up at 9am and take position at the far left at the spots where there's no benches. A hundred or even fifty yards is far for a new shooter to be shooting in the standing with the size of the target frames, so I might just have him function fire it into the berm. I'll probably bring a target frame though. If you want to come along, PM me and I'll bring more ammo. Afterwards, I might head over to the skeet side. If you want to pay for your skeet games ($5.25) and bring ammo (20 gauge #8 birdshot), you can use my shotgun too.