OOD Tight-Bore Machined Aluminum Barrel

The OOD Tight-Bore Barrel is a machined aluminum barrel tube for spring-powered foam dart blasters. Precision-machined from high-quality aluminum with a consistent 12.75mm inner diameter, these competition-grade barrels are an excellent choice for eking out even more performance from high-performance blaster builds. Additionally, multiple lengths are available in 50mm increments, allowing for reliable, predictable performance tuning.

FEATURES:
• OOD Tight-Bore Barrel
• Precision-machined aluminum tubing
• For ultra-high-performance springers
• Consistent 12.75mm ID
• Unchambered with simple chamfered inlets
• Designed for most standard-breech springers
• Compatible with SLAB, SMILEY + Caliburn*
• Not compatible with Worker Seagull, Harrier, or Kunlun

*Blasters tested with our CNC-milled Ramcores. Caliburn, Alchemist and select other blasters may need new OOD rams to fit.

INCLUDES: 
• 1 12.75mm ID barrel in the length of your choice

PERFORMANCE: 
Average FPS (Standard Deviation) in Silly’s Alchemist
with 2.03 x 140mm spring + 350mm (~14in) barrel
• 233 (5) FPS with 0.527in (13.38mm) barrel
• 244 (2) FPS with 13mm barrel
• 246 (3) FPS with 0.509in (12.93mm) barrel
• 247 (3) FPS with 12.75mm barrel

Average FPS (Standard Deviation) in CS Caliburn 4
with 2.03 x 280mm spring + 350mm (~14in) barrel
• 225 (5) FPS with 0.527in (13.38mm) barrel
• 262 (5) FPS with 12.75mm barrel

SPECS:
• Material: Machined Aluminum
• Dimensions:
     ID: 12.75mm
     OD: 16mm
     Lengths: 250-500mm
     Tolerance: ±0.05mm
• Weight: 94g
• SKU: BARREL_12.75MM

LINKS:
• Standard-Bore Barrels
• Replacement Ramcores
• 140mm Tuning Springs
• All Springer Barrels