Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: Can this be used on the end of the barrel for front sight mounting? Mossberg 500A
Document: Used this to add a rail to my Stevens 320 for a tactical flashlight. I did have to pull off the barrel to mount on the mag tube (not enough space), but it fits great right behind the cap and barrel slid back over easily.
Worked great on my Mossberg 500 18&#34; short barrel. I found by looking for a rail mount I had a limiation of less than inch to mount one on the magazine tube. I have a 5 shot tube in mine. This one fits perfectly.
I'm putting this on my Mossberg 500 7+1 to mount my flashlight under the barrel. I was originally going to mount the light to the ATI forend grip but wanted something alittle more stream line. this should do the trick. If its made close to the quality of the NC Star weaver mount I purchased to hold my surefire light, I'm sure it will be fine.
It fits snugly on the end of my magazine tube but the finish comes of really easy the two rail sizes are nice.
Arrived on time as advertised with two rails to attach to the ring, (1)long, (1) short. Easy to install, hold my light at the end of the forend where I can activate it with the touch of a finger.
Fits well, rigid mount. Does what I wanted it for. Comes with a 4-slot and a 5-slot rail which have variable mounting positions available.
I put this on my Mossberg 500 persuader and it lasted about 3 shots. The bolt that holds the rail on the clamp is too short. broke off and pulled the threads out of the base...
I have this on a mossberg and shot a few rounds. It held but I didn't have anything mounted on it at the time. I recently put a light. Lets see how well it holds.
I was skeptical of buying this mount because it only has 1 screw holding the rail to the ring. I put the ring around the Magazine tube of a pistol gripped 590A1 shotgun and used the long rail (it comes with 2 rails, one long, one short)  I used red loc-tite on all the screws and let them set overnight before use. I attached a Jetbeam Tactical RRT-2 Cree light to the rail.
I'm sure it's a good attachment for some applications, but it's too big for a Remington 870 Express 12 gauge barrel.
Answer: yes