AR 15 style rifle Short Barreled Rifle SBR – Custom 3D Printed Miniature Accessory Parts Pieces for Brick Block Figures

A black, short-barreled, AR-15 style rifle accessory for LEGO minifigures, featuring a tactical handguard, an optic on top, and a compact stock.

Specifically, this appears to be a custom LEGO-compatible piece modeled after a Short Barreled Rifle (SBR) variant of the AR-15 platform. The filename “喷火龙短管” (Pēnhuǒlóng duǎn guǎn), which translates to “Charizard short barrel,” suggests it might be a product name implying a “spitfire” or prominent muzzle flash effect, common with such short barrels. The overall design with the specific type of free-float handguard (with triangular or diamond-shaped cutouts) and the presence of a top-mounted optic are characteristic of many modern, customized AR-15s.