Built with an interchangeable feed tower.
You can easily disassemble the drum, slide your AR-22 tower out and replace it with the new Black Dog 10-22 or S&W.22 feed towers.
BDM does not guarantee that the drum will work in full-auto setups. However, many customers report that with a little fine tuning they can get the drum to work in full-auto.
Compatible conversion units :
Model 1 Sales
Sig Sauer 522
Will Not work with: H&K 416.22/Umarex, HK-416D Pistol, Colt/Umarex M-4 Carbine, M-4 OPS, M-16 Rifle & M-16 SPR.
Recommended Ammunition: Federal, CCI/Blazer, American Eagle. Use a round nosed bullet. Stay away from hollow points. Ammunition not listed will not feed well in BDM products.