You can buy a metal detachable magazine kit that fits the Vanguard.
Several make them for the LA.
They use AISC magazines.
Waters out of Australia is easy to get, fits great and isn't to badly priced (landed costs), note: one of mine took some fitting for ease of magazine insertion but they both fit the stock nice. His uses a 3.56" magazine length.
Atlas works also offers one but I don't have it yet, they use the 3.715" mag length so 3 round mags are available in that version.
Several make them for the LA.
They use AISC magazines.
Waters out of Australia is easy to get, fits great and isn't to badly priced (landed costs), note: one of mine took some fitting for ease of magazine insertion but they both fit the stock nice. His uses a 3.56" magazine length.
Atlas works also offers one but I don't have it yet, they use the 3.715" mag length so 3 round mags are available in that version.