Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: Do you have to remove the sling swivel in order to attach this rail?
Document: Also, Remember if you think you might want to remove the rail and reinstall sling ring, you'll need a new pin and something to roll back the pin once, it is thru, in order to hold the ring on. I installed this on my Windham AR, that has an iron front site/gas block on the barrel. No mods to lug or the sling ring base.
It only goes on about an inch or so before it hits the gas block. There is no way to fully, securely seat the mount on the bayonet lug. Unlike the comment about hitting the sling swivel, this interference cannot be corrected. The PM216 itself looks to be well-made and satisfactory in all ways if it fits your rifle - pinned gas block, remove factory mounted forward sling loop.
Had to remove the sling hoop but it works out perfect as this adds side sling hoops. Not all front sight blocks haven't he same style sling hoops below so it can be different for others. Worked perfect with a mil spec.Adds accessory rail to the useless bayonet lug. Now you can have a light or bipod.Did as advertised and did it well.
Lightweight alloy is great quality and I expect it to hold up well plus it doesnt add a weight to the front end of my rifle. Very easy to install however you must remove the front sling...not a hard thing to do with a small drill. The only reason I didnt give it 5 stars is because I use a single point sling and have no need for the two sling bars on the sides of the rail....just useless to me.
This is a rock solid mount for the useless bayonet lug. Great if you want an additional rail mount. I am going to use mine for a bi-pod mount. For this to fit correctly you will need to remove the sling mount piece on your rifle. Mine had a rivet holding this on and I had to drill the rivet out. The bayonet mount has two sling points on either side of rail, which is actually more functional than the factory sling point.
I purchased three of these products for use on M4 type assault rifles, and they live up to my expectations. I have mounted lights and laser projectors onto them with no problems. Be aware that a modification might be necessary to fully utilize this product, the set screw is designed to project through the forward sling mount hole. I did not remove the forward sling mount, just pushed the rail snugly against it and tightened the set screw. I've had no problems thus far with it loosening or moving.
The holes to mount to the sling swivel holes were not lined properly. It took some work with a drill bit to get the screw to grab tight. Once secured, it does what it was supposed to do, but I had to work it a bunch to barely make it hold. I would absolutely love and recommend this if it fit properly out of the box.
This would have been a great little addition "IF" it worked. Design and feel are first rate for what it is. Not only cut for lugnut but also has two screw attachements to make it rock solid "IF" it worked.The Colt 6920 has a built on sling within the front sight area and this product will not slide past block that holds the swivel nor could you take it off and then mount this and replace the sling swivel.
Where to start.......First there are no instructions with this piece. It took some intuitive thought to figure out that in order for this piece to be secured, you have to punch out the pin holding the factory installed sling ring, immediately to the rear of the gas block. It takes a small 1/16&#34; punch, and, some pretty good whacks with a small hammer to get that pin out.
Had to drill out the internal screw to install this. Good quality, looks good, utilizes empty unused space. I attach a bipod on this. Would recommend.
Answer: yes