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Inner Barrel
Assembly

Gearboxes

Accuracy and range are the single most deciding success factors in any engagement. Unlock the most potential out of your gun by upgrading your inner barrel assembly.

Pictured is 1" x 1" grid target shot at 150 feet with R-Hop barrel assembly in Umbrella Armory HK416a5 (400FPS with .2g BBs).

Shells and Completed gearboxes pre-upgraded by our technicians for an easier build.

Collection: INNER BARREL ASSEMBLY

7 products
Umbrella Prometheus 6.03 EG inner barrel with R-hop
Regular price
$115.00
Sale price
$115.00
Umbrella Armory x Maxx Model Precision Hop-up Unit
Regular price
$60.00
Sale price
$60.00
Umbrella X Japan 6.05mm R-Hop Inner Barrel
Regular price
$185.00
Sale price
$185.00
Umbrella Flat R-Hop Hopup Arm (Set of 2)
Regular price
$16.00
Sale price
$16.00
Umbrella Flat-Hopped Modified Madbull Blue 60-Degree Bucking
Regular price
Sold out
Sale price
$15.00
Umbrella Standard Hopup C Clip
Regular price
$6.00
Sale price
$6.00
Inner Barrel Assembly Stabilizer O-Ring (10pc)
Regular price
$5.00
Sale price
$5.00

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