Stanag / AR magwell for the T36/G36 platform, this is a replacement magwell that allows the use of standard AR15 style magazines. This swaps right on and doesn't require any modifications ON THE G36/TG36 but YOU MUST REMOVE THE G36 MAG RELEASE TO INSTALL. THE SL8-1 AND -6 REQUIRES THAT THE RECEIVER BE MODIFIED ($245 PLUS THE RETURN SHIPPING ) AND YOU NEED A G36 BOLTHEAD AND ONE MORE PART TO BE 922R COMPLIANT. These are black nylon polymer with aluminum mag release available in black anodize.