No regulator means no waiting 5 seconds between shots for reg to function, more air(500cc VS 330cc) and more power. With the 500cc bottle you will get 6 mags and very consistent velocity. This custom configuration is the same as the old HP carbine/assassin with the better build quality of the sf. Check youtube for video's with carbine/assassin .25 for shot count and accuracy. Call Jay 360 241 5293 proven seller ![20240416_111021[1].jpg](https://www.airgunnation.com/attachments/20240416_111021-1-jpg.456362/ "20240416_111021[1].jpg")
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