- WA, G&P WOC and King Arms* M4 Compatible
- Outer shell is metal, not plastic
- Magpul PTS Licensed
- 39 round capacity
*King Arms GBB M4 will need to be modified for bolt catch to work.
These magazines may need some lube for the spring guide and follower. BB's sometimes will stick on fresh magazine out of the box. After some wear and use, the BB's feed perfectly. The fit into the WOC, WA and King Arms is very smooth and the mags will drop free from the GBB with no problems when ejecting.