I picked up a ST dynacomp to try out on my 17. I have been running an AAC MITER Flash Hider on it which worked great for what it is but decided to try something new. I haven't gotten to the range with it yet so these are just my initial impressions after install. Hopefully this weekend I can test it out
The Dynacomp looks similar to the battlecomp with some minor differences and well less than 1/2 the price for the .308 version.
There is a pre-drilled pin hole at the 6 o'clock in case you want to permanently attach it.
Here it is out of the package
Looking at the thread area it is the 5/8-24 TP
This comp is not designed specifically for the SCAR so it requires the use of the jam nut to index correctly (it comes with a crush washer to use on barrels with a shoulder to index off of. Like the battlecomp there are no ports at the 6 0'clock to aid in muzzle rise.
For the install, I screwed the jam nut on as far as it would go then put then screwed the comp all the way on. Once it hit the jam nut, I backed it off to where I wanted it indexed and then tightened the jam nut against it. super easy 5 min job.
Here is what it looks like installed (in some pics it looks metalic but thats just my camera, it is really a semi-gloss black)