The Double Alpha Alpha-X Insert Block - Tanfoglio Square / Stock II secures the pistol solely at the front end of the trigger guard, necessitating a precise fit in that area. In some instances, minor adjustments to the insert block may be needed.
The Insert Block Assembly includes:
The Locking Block (Tanfoglio Square / Stock II).
The Sliding Lock, assembled (Tanfoglio Square / Stock II).
The safety lever, assembled.
The internal magnetic activation system, assembled.