Has anyone changed a stock on an ARP 556 or ARP 9? I’d love to know which buffer tube to go for (I really like cheap) and any other advice you might have on this. Cheers.
The HRS uses an AR15 fixed tube, because it’s real steel, you can’t get an AEG stock for it.
You'll need to buy an normal 6 position type stock tube, machine off the adjusters and tap a hole in the tube, and drill a hole in the stock, to get it to fit right.
OR
Look on DHgate or aliexpress for a UBR stock, most have AEG tubes on there ??