Manufactured by Black Dog Machine, this is their 50-round drum magazine for the AR-15 .22 LR platform.

This magazine fits the following platforms: 

• Bear Creek Arsenal .22 LR
• Ciener/Atchisson  
• Model 1 Sales  
• Kriss 22LR
• Spikes Tactical  
• Tactical Solutions  
• Target Master  
• SIG P522 SWAT
• Kel-Tec PLR22 
• Chiappa M4 .22
• Rock River LAR .22
• Sig Sauer 522  
• WMD Guns LLC 22LR
• Rifle, MK4 Banshee .22LR NFA
• Bushmaster combo kit
• Nordic Components
• MANY OTHER .22 ATCHISSON/CIENER STYLE CONVERSION UNITS, UPPERS & RIFLES THAT MIGHT NOT BE LISTED

This will not work with the following platforms:

• Hammerli Tac R1.22
  
• Tippman Arms M4 .22
• Magnum .22
  
• S&W M&P 15 .22
• H&K 416.22/Umarex
• HK-416D Pistol
• Colt/Umarex M-4 Carbine
• M-4 OPS, M-16 Rifle
• Beretta ARX160 .22LR
• M-16 SPR, Rock River
• Compass Lake .22
• Kriss and other models that may not be listed.

The rotary drum design is constructed from durable translucent smoke polymer and quality steel components.