The UST Mamiya Recoil Dart 105 .355 F4-S sits at the heavy end of graphite iron shafts at 3.74 oz (106 g), while its 2° torque is on the lower side. Its mid launch / mid spin flight profile and very stable / low-twist character make it best suited to medium or medium-fast tempos.
Iron shaft specifications
UST Mamiya · Recoil Dart 105 .355 F4-S · Iron Shaft
Material: GraphiteFlex: F4-SWeight class: Midweight (100-119.9 g)Flight: Mid launch / Mid spinTip: Taper tip
3.74 ozWeight
2°Torque
F4-SFlex
MidLaunch
Material-matched benchmarks
How this shaft compares
Numeric comparisons use graphite iron shafts in this database.
Weight
Very high
3.74 oz
Weight is very high among graphite iron shafts in this database.
Torque
Very low
2°
Torque is very low among graphite iron shafts with published numeric torque.
Balance point
Very low
50.5%
Balance point is very low among comparable graphite iron shafts.
At a glance
Shaft profile
MaterialGraphite
TipTaper tip
LaunchMid
SpinMid
StabilityVery stable / low-twist
Tempo fitBest suited to medium or medium-fast tempos
Overview
Model information
| Manufacturer | UST Mamiya |
|---|---|
| Model | Recoil Dart 105 .355 F4-S |
| Category | Iron Shaft |
| Catalog year | 2026 |
| SKU / code | US0129 |
| MPF rating | 4B2H |
Full specifications
Technical details
Weight & flex
Weight3.74 oz (106 g)
Weight classMidweight (100-119.9 g)
FlexF4-S
Torque2°
Bend pointmid
Kick pointMid
Tip stiffnessmed/firm
Tip flexfirm
Butt flexmedium
Balance point50.5%
Build & dimensions
MaterialGraphite
Tip typeTaper tip
Tip diameter0.355 in (9 mm)
Butt diameter0.6 in (15.2 mm)
Shaft length41 in (104.1 cm)
Length rangeSingle-length blank; trim to club
Parallel tip lengthN/A — taper-tip design
Club rangeIron set, typically 2i/3i-PW
FinishPainted composite / graphite finish (varies by model)
Flight & feel
LaunchMid
SpinMid
Trajectory / spin profileMid launch / Mid spin
Stability profileVery stable / low-twist
Launch assistanceNeutral launch assistance
Feel profileVibration-damping graphite feel, very firm/stable through impact
Relative weight positionVery high for graphite iron shafts
Relative torque positionVery low for graphite iron shafts
Player fit
Tempo fitBest suited to medium or medium-fast tempos
Transition fitSuited to moderate-to-firm transitions
Control vs speed biasControl / consistency biased
Long-iron playabilityNeutral long-iron playability
Short-iron controlStrong short-iron and wedge control bias
Likely swing-speed fitModerate iron swings
Target playerBroad range of golfers seeking a balanced combination of feel, launch and control
Golfer fit summaryControl / consistency biased; best suited to medium or medium-fast tempos; mid launch / mid spin.