This rather conventional lock-up system has a large rectangular lug over the barrels chamber that rides into and engages the ejection port cut-out in the slide

Recommended BB:

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the better you can perform and focus on the game

Hugh Infinity Magwell for Aluminum Pistol Grip (Gold) 7.4v LiPo Battery This rather conventional lock-up systemMagwells are a simple yet effective way to customize your airsoft pistol while adding some beneficial features. For one, the added vivid appearance sparks a fresh and new look on your pistol. Additionally, the magwell assists in guiding the magazine toward the appropriate location. This model comes with a thicker base at the bottom of the piece with a funnel feature guiding your magazine into the well. Compatibility: Tokyo Marui 5. 1 or 4. 3 Hi Capas