Viper S400 Crossbow Logo

Viper S400

Item on Backorder - Ships in 3-4 Weeks

Viper S400 Crossbow Quartering Away Studio Image
New ACUslide Cocking and De-Cocking System
Provides silent cocking and safe de-cocking.
Close-up of TenPoint ACUslide unit.
New S1 Trigger
2-stage, zero-creep design features a roller sear system that sets a new standard in high performance crossbow accuracy.
RangeMaster Pro Scope
Featuring multi-coated glass for optimal light gathering, the variable speed scope includes lighted aiming points for precision down-range accuracy.
Close-up of TenPoint RangeMaster Scope.
New TEC-X Stock
Dramatically minimizes stock size, reducing the weight of the crossbow by 1/2-pound.
Close-up of TenPoint TEC-X Stock
New Micro-Trac Barrel
Reduces string-to-rail contact by an incredible 50% - leading to increased accuracy and the longest string life in the industry.
Close-up of TenPoint Micro-Trac Barrel.
4.8 / 5.0
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why buy tenpoint?

Viper S400 in the Woods
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Others De-Cock. We Do It Safely.
Our customers have spoken
4.8 / 5.0
It was smacking 20 on the range with no worries. I had to bring it back to the farm for any type of hunting distance. 3 shots later I’m smacking 50-yard bulls. (freehand) It is a nice bow that shoots great. I would recommend.
This bow is phenomenal. Its accuracy is unapparelled. I put 200 shots through the Viper today. I don't know what you did to the strings and cables but they never show any wear. I haven't put anything on the strings or even used any rail lube. This is the perfect crossbow.
Todd Bromley
This crossbow fits everything a crossbow hunter would want. The accuracy is unbelievable, with a superb trigger. The new cocking device makes loading and shooting a breeze. Can't think a a single change to make it any better.
Retired Al
Safe De-Cocking

Safe De-Cocking

Forget holding buttons, using straps, and losing control while de-cocking. Meet TenPoint’s new ACUslide – The only safe and controlled crossbow de-cocking system on the market. Simply backwind the handle – stopping at any point without fear of damage, injury, or losing control.


The Viper S400 measures an ultra-narrow 7.2-inches wide – giving you more shot opportunities in tight shooting situations.
48% More Accurate

48% More Accurate

Stainless steel latch locks the trigger box at full-draw – relieving the tension from the ACUslide unit and guaranteeing that your trigger box is in the same location on each shot, leading to 48% increased down-range accuracy.
Greater Trigger Control

Greater Trigger Control

3 1/2-pound, 2-stage, zero-creep trigger gives you greater trigger control – leading to tighter groups and same hole down-range accuracy.


TenPoint crossbows are the safest on the market, boasting an unmatched combination of safety features, including our ACUslide cocking and de-cocking system, Dry-Fire-Inhibitor, and safety wings.

Item on Backorder – Ships in 3-4 Weeks

Our shortest forward-draw hunting crossbow ever produced, the light-weight Viper S400 measures just 32-inches in length yet delivers speeds up to 400 FPS and is sold as a crossbow package. Featuring the NEW revolutionary ACUslide silent cocking and safe de-cocking system, this ultra-compact hunting crossbow measures an ultra-narrow 7.2-inches wide and features a 3.5 pound, 2-stage, zero-creep S1 trigger that delivers our most crisp, consistent break ever. If you are looking for the ultimate hunting crossbow package, look no further than the Viper S400.

Package Includes:

  • Optics: RangeMaster Pro Scope mounted on a machined aluminum 7/8-inch Fixed Dovetail Mount
  • Cocking Device: ACUslide Cocking and De-Cocking System
  • Quiver: 6-Arrow Tech Quiver
  • Arrows: Three Evo-X CenterPunch premium carbon arrows with 100-grain practice points

How to Cock and De-Cock Your Crossbow with the ACUslide

Length (w/o foot stirrup) 32"
Width Axle-to-Axle (uncocked/cocked) 11" / 7.2"
Power Stroke 11"
Weight (w/out accessories) 7.5 lbs.
Speed/KE: Pro Light Carbon Arrow (370-grains) 400 FPS / 132 FP KE
Speed/KE: Pro Elite 400 Carbon Arrow (400-grains) 390 FPS / 135 FP KE
Speed/KE: EVO-X CenterPunch Carbon Arrow (445-grains) 370 FPS / 135 FP KE
Draw style Forward Draw
Safe De-Cocking ACUslide

Viper S400 Crossbow Top-Down Studio Image
Viper S400
Price $1,549.99$1,649.99
Speed 400 FPS / 135 FP KE
Length 32"
Width 11" / 7.2"
Power Stroke 11"
Weight 7.5 lbs.
Draw Style  Forward Draw
Vapor RS470 Top-Down Studio Image
Vapor RS470
470 FPS / 191 FP KE
12" / 6.5"
8 lbs.
Top-down image of TenPoint Vengent S440 crossbow.
Vengent S440
440 FPS / 166 FP KE
11" / 5.8"
7.7 lbs.
Forward Draw
Turbo M1 Crossbow Top-Down Studio Image
Turbo M1
380 FPS / 122 FP KE
14" / 9"
6.4 lbs.
Forward Draw



Built in America


  • Auto-Brake Safe De-Cocking
  • Maximum Speed and Kinetic Energy
  • Cocking Force Required
  • String Life (#of shots)
  • Weight
  • Ability to Remain Cocked All Day
  • Rest Life
  • Industry Leading Silence
  • Warranty
  • Years of Crossbow Innovation

  • ACUslide Cocking & De-Cocking System

  • 470 FPS/191 FP KE

  • 5 lbs.

  • up to 1,300 shots
  • 7.5-8 lbs.
  • Unlimited

  • Limited Lifetime

  • 27 years

  • 450 FPS/180 FP KE

  • 12 lbs.

  • less than 400 shots

  • 6.5-6.8 lbs.

  • less than 8 hours

  • Subject to Breakage

  • Limited 5 Year

  • 4 years

  • 410 FPS/149 FP KE

  • 10 lbs.

  • inspect at 300 shots
  • 6.9-7.6 lbs.

  • Unlimited

  • Limited Lifetime

  • 8 years
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