Heavy duty flush cup base

Pair of threaded Fluch Cup bases.

These Flush Cup bases are made from all-steel construction, which provides exceptional strength and security. It allows multiple swivel positions to be added to any synthetic or wood stock firearm. These bases accept any Grovtec push-button swivel.

Used on the following GRS stocks:

• GRS Bifrost
• GRS Fenris
• GRS Ragnarok & Ragnatok 2.0
• GRS Warg
• Can be installed on aftermarket stocks.