L3I CZ 457 Magazine Block, Red

L3I CZ 457 Magazine Block, Red. The Empty Chamber Indicator from L3I for the CZ 457 and 455 allows you to quickly show clear by inserting the flag into the mag well. It will click securely into place just like a magazine. The Bright red color is easily visible to all. The chamber flag is an additively manufactured (3D printed) product with some minor surface variations present.