WELL PRO WE09 AK-12K Gas Blowback Rifle w/AK-205 Stock

Code:
£549.99
  • Full metal construction
  • TM ZET System-based internals
  • NPAS Pre-installed - Adjust FPS to suit your needs!

If you're into modern Russian firearms designs, the WELL PRO WE09 AK-12K Gas Blowback Rifle w/AK-205 Stock will put a big smile on your face! Based on the latest development of the AK-12K, known as the AK-205 by Kalashnikov Concern, this beast marries authentic AK heft with modernised controls and ergonomic furniture, keeping the best bits of the O.G. AK-47 with more accessory options and a manual of arms more comparable to modern, Western rifle designs.

On the inside, the WE09 is based on the superb Tokyo Marui ZET System AKM, meaning aftermarket parts are available for the upgrade fiends and gas efficiency is top notch. The realistically sized bolt carrier group features a pre-installed NPAS valve, allowing you to adjust velocity to suit your exact needs, regardless of your choice of power source. Also present is a 6.03mm tight-bore inner barrel, furthering the WE09's efficiency edge and providing superb accuracy, as long as you do your part!

A full metal build with more than its fair share of stamped steel parts, the WE09 AK-12K will definitely please realism fans and its immersive firing experience is something only a GBBR can provide. If you're ready for the challenging but oh-so-rewarding GBBR playstyle, the WELL PRO WE09 AK-12K Gas Blowback Rifle w/AK-205 Stock is ready for you!

Full description

Description

If you're a lover of recoil and realism, the WELL PRO WE09 AK-12K Gas Blowback Rifle w/AK-205 Stock will definitely satisfy! Based on the latest evolution of the AK-12K, known as the AK-205, this full metal GBBR makes use of plenty of steel in its external build for a realistic feel and is internally based on the Tokyo Marui ZET system, meaning performance is on point!

Inside, the WE09 is equipped with what is known as an "NPAS" (Negative Pressure Adjustment System), aka an adjustable valve. This allows you to adjust FPS to suit your needs using an Allen key inserted through the front of the nozzle. This system works by altering the proportions of gas sent down the barrel and back into the action, meaning if you tune it to the UK's relatively low site power limits, you're recoil will be astonishing!

Also inside is a 6.03mm tightbore inner barrel, offering superb accuracy potential and an efficiency edge out of the box. If you're down with the latest Russian assault rifle designs and love the challenging GBBR playstyle, the WELL PRO WE09 AK-12K Gas Blowback Rifle w/AK-205 Stock will be an asset to your arsenal!

Starting at the tip of the 12.4-inch alloy outer barrel, we find our first AK-205 twist that this rifle possesses. This AK-12 features an AK-205 birdcage-type hybrid flash hider. This is not the usual, aggressive muzzle break you would expect to find on an AK-12 but we appreciate the refreshing inclusion of this flash hider, no accidental poking and prodding from the typical spiky muzzle break! However, if you're not a fan of this alternate muzzle attachment you can find the 14mm CCW male threading concealed beneath (don't forget to unscrew the grub screw first before attempting to remove the compensator).

The muzzle attachment is followed by a dummy bayonet lug at the bottom, which adds to the realism and keeps the gun nerds pleased. Travelling rearward along the outer barrel brings us to the front sight/gas block of this AK-12, constructed from alloy with a dummy gas adjuster at the front. The front sight post at the top is protected on either side with protective wings. This ensures that if you drop this replica rifle, it may bear some cosmetic damage, but the front sight should remain usable and intact in all but the worst-case scenario.

The gas block connects to the dummy gas tube, which is also constructed from alloy. Below the gas tube, there is a single sling point which is mounted around the barrel but can swivel to either side to reduce the chances of the sling getting tangled. This versatile sling point also allows both left and right-handed shooters to sling this AK easily. This is a nice feature as AK platforms are usually constructed without left-hand shooters in mind, so it's good to see that the AK-12 features functionality for those lesser-spotted left-hand shooters.

Following the gas tube back leads us to the high-density polymer handguards of the AK-12, which have integral 20mm Picatinny rails at the 6 and 12 o'clock positions and adjustable alloy side rails at the 3 and 9 o'clock positions. These side rails can be moved along the handguard or removed completely. Though this rifle may be Russian in origin, it can be kitted out to the nines like an MK18, with plenty of room for tactical flashlights, PEQ lasers and anything else you can think of mounting. This is a nice deviation from the standard AK rail space we are used to, A.K.A., have fun trying to find any room to mount attachments!

The HOP-up of the AK-12K is located inside the receiver, accessible with the receiver top cover, recoil spring assembly and bolt carrier removed. Adjustments are applied through the dial on the left side of the barrel base, allowing you to set the amount of backspin applied to your BBs, seeking the flattest possible trajectory. You may find a small tool makes adjustments easier, as the dial is quite out of the way. While it may not be as easily adjusted mid-firefight as an AEG, this TM-based design should ensure the HOP-up holds its setting flawlessly under the hard recoil of shooting!

Moving rearwards, we come to the realistic stamped steel receiver, mirroring the shape of the real steel AK-12 receiver perfectly, complete with reinforcement divots and mock pins and rivets in all the right places. This receiver roughly follows the standard AK design format but with some notable changes to ready the legacy AK design for the 21st century.

Firstly, the fire selector is ambidextrous and can be used without removing your hand from the pistol grip, replicating the modernised fire selector found on the real steel AK-205. This design has similarities to a standard M4 fire selector, but keeps the classic AK dust cover mech, which raises and lowers as the selector is operated. This allows the bolt carrier to fully retract when shooting to load the next round, and when you select "Safe" again, the dust cover raises and prevents dirt and debris ingress.

The receiver top cover design is another area of this AK-12 that diverges from the original design, being closely based on the modernised AK-19 top cover. It is constructed from stamped steel, just like the real thing, and features a 20mm Picatinny rail on the upper surface to allow for optical sights to be mounted using far more user-friendly Western mounting solutions. Unlike some other AKs with railed top covers, this top cover is secured at the front with a push pin and engages with the rear of the receiver using a pair of hooks, meaning any optic you have mounted can be reliably zeroed.

Removing the top cover requires the pin on the milled steel trunnion block to be pulled out from the right side, after which the top cover can be slid rearwards and off the platform. Being a GBBR, this is only necessary for routine maintenance, but thankfully, it is super easy, just like a real AK-12. When reinstalling the top cover, you must ensure that you align the pin hole in the front of the top cover with the holes in the trunnion block before pushing the steel pin back through. The top cover needs to be slid onto the receiver from the rear to connect with the two hooks at the rear of the lower receiver to hold it securely in place.

The pre-installed AK-19 pistol grip is a fantastic ergonomic improvement over the legacy AK grip, offering textured detailing on the flanks and a built-in enlarged trigger guard, ideal for gloved shooters. The grip is set at an angle that provides a comfortable wrist position when shooting with the stock collapsed fully and in modern shooting stances. The AK-19 grip also pairs perfectly with the modernised AK-205 stock, making this the most cutting-edge Russian AK build out there. AKs are not usually associated with comfort or ergonomics, so this is certainly a surprising but positive adjustment for us sensitive Westerners!

Installed on this version of the AK-12, we are treated to the AK-205 pattern stock, a modern Russian design which follows the format of SCAR, ACR and other modern multi-adjustable stocks. With the addition of an adjustable cheek rest to provide the perfect eye level when using a scope or sight, this is probably the best AK stock on the market, providing comfort and ergonomics that old-school AK users can only dream of!

Like the legacy AK-74M stock, the AK-205 stock offers side-folding functionality, allowing this AK-12 variant to fit into smaller gun bags and be transported with ease. To fold the stock, simply press the usual AK side-folder button on the rear left of the receiver and the stock can be folded and locked into place. To deploy the stock again, simply pull downwards on the metal tab that protrudes from the folding mechanism at the rear, and the stock can be extended back into position.

Thankfully, this stock is a lot easier to handle than an AK-74 stock, requiring only the folding mechanism to keep things in place instead of the protruding hook used on the AK-74. At the base of the stock on both sides, we are treated to QD sling socket inserts constructed from steel, allowing for a slick, modern QD sling setup to be mounted using QD sling swivels if you so choose. A more conventional "footman loop" sling point is also present on the stock, providing plenty of built-in sling options to suit any preference!

The AK-205 stock also offers length of pull adjustment via the lever at the toe of the stock, giving you 6 positions to choose from to compensate for bulky body armour vests or different body types. The butt plate is constructed from grippy rubber with an aggressively grooved surface, guaranteeing the stock won't slip off your shoulder during wet weather operations.

After getting some trigger time on this beast, we've been very impressed with its gas efficiency, recoil and reliability. WELL PRO kindly provided us with a sample of the full-sized AK-12 prior to release, and we've barely put it down!

Being based on the Tokyo Marui ZET system, this AK keeps on thumping even in relatively cold weather and maintains surprising accuracy for a gas-in-mag platform when fired in a controlled manner, ideal for the realism-focused skirmisher who appreciates pinpoint performance. Adding to its already efficient nature, a 6.03mm tightbore inner barrel is pre-installed, providing a slight FPS boost and further enhancing accuracy when high-quality BBs are used.

If you're working on a modern Russian loadout or simply appreciate realism and recoil in a hefty, authentic build, the WELL PRO WE09 AK-12K Gas Blowback Rifle w/AK-205 Stock will put a big smile on your face! An AK which handles like a Western design, ready for accessories with the menacing AK aesthetic, this AK-12K is ideal for the skirmisher who loves the challenging yet satisfying GBBR life!

Features

  • Full metal construction
  • Gas Blowback Rifle - Heavy recoil, realistic handling, low-cap mags - A rifle for the pros!
  • 6.03mm Tightbore inner barrel - Great accuracy potential
  • 14mm CCW Male threaded outer barrel - Tracer/suppressor ready
  • AK-205 Birdcage flash hider pre-installed - The perfect device for the most modern AK!
  • 20mm Picatinny railed handguard - Ready for 20mm Picatinny accessories
  • Removable side rails - Keep the rails for accessories or remove them for comfort!
  • Gear Adjustable HOP-up unit - Field strip to access the dial on the left side of the barrel base
  • 20mm Picatinny railed receiver - Ready for a red dot sight or scope, plenty of space!
  • Adjustable aperture iron sights - Far better than the usual AK sights, long sight radius
  • Steel receiver, trunnion block & top cover - Maximum realism, significant heft!
  • AK-19 Pistol grip & enlarged trigger guard - Comfortable and modern, great for gloved shooters
  • AK-205 Extended ambidextrous magazine release - Two release options, trigger finger or weak hand thumb
  • Ambidextrous AK-205 fire selector switch - Operate without removing your hand from the pistol grip!
  • Realistic "field strip" disassembly - Access the internals for maintenance with ease!
  • Side folding retractable AK-205 stock - A very advanced stock design, superb ergonomics, 7 positions
  • Adjustable cheek riser - Lift and slide the riser forward to raise it, and push down to lower
  • Serrated rubber butt plate - Optimal gripping qualities for wet weather or body armour users
  • Compatible with WELL PRO WE09 AK-12 GBB Magazines
  • Is this your first GBBR? If so, check out our GBBR Guide

Package Includes

  • WELL PRO WE09 AK-12K Gas Blowback Rifle w/AK-205 Stock
    • 35rnd Green Gas Magazine
    • Speed Loader
    • Hard Case

Special Instructions

This is a Gas Blowback Rifle. GBBRs require maintenance and careful handling and we do not recommend them for new skirmishers. Things to watch out for if this is your first GBBR:

  • The HOP-up adjuster for this WELL PRO GBBR is inside the receiver, on the left side of the outer barrel. It is accessible with the receiver top cover, recoil spring & guide and bolt carrier assembly removed.
  • GBBRs need to be cocked before the first shot, just like a GBB pistol. It is important that you do not double-load a GBBR, as this can break the nozzle. We recommend clearing the chamber of BBs with a cleaning rod in the event that you finish firing mid-magazine.
  • GBBRs generally use higher-pressure gas than GBB pistols due to the extra weight of the bolt carrier. We recommend Green Gas (NUPROL 2.0, VORSK V6, ASG Ultrair) for general use and Red Gas (NUPROL 3.0, VORSK V8) for cold weather use.
  • The faster you shoot a GBBR, the less accurate it will be. This is due to pressure variance as the gas reservoir cools down. Full auto is basically for fun, and these rifles run far better when used in semi-auto mode.
  • Like a GBB pistol, GBBR magazines require maintenance. We recommend leaving a small amount of gas inside the magazine when stored and not storing the magazines in a cold or damp environment. Magazine seals and valves will need lubrication and to be kept clear of dust and debris.

Specification

General

Weapon Construction External
Weapon Type
Assault Rifle
Over 18 Only Icon
Over 18
Yes
Icon UKARA - United Kingdom Airsoft Retailer Association
Defence / UKARA Required
Yes, No,
FPS Icon
FPS, using 0.20g BB
Approx.320fps ± 10%, using 0.20g BB
Site Legal Icon
Site Legal, using 0.20g BB
Yes
Screwdriver Icon
Pre-Built
Yes
Package
Included Items
  • Magazine
  • Speed Loader
  • Hard Case
Skill Level Icon
User Skill Level
Advanced Player
Patrol Base - Warning Icon
Warnings
Lubrication is required

Weight and Dimension

Weight KG Icon
Weight (KG)
Approx. 2.998kg
Weapon Length Collapsed
Length (Collapsed)
62cm
Weapon Length Extended
Length (Extended)
80cm

Construction

Construction Icon
Construction
Alloy flash hider, outer barrel, gas block, gas tube, bolt carrier, fire selector & trim. Steel trunnion, receiver, top cover, dust cover, trigger guard & rear sight. Polymer handguard, stock & grip
Weapon Construction External
External Construction
Polymer
Alloy
Steel
Gearbox Icon
Internal Construction
Polymer
Alloy
Aluminium
Steel

Weapon Specific

Power Source Icon
Powered By
Green Gas
Blowback Icon
Blowback
Gas Blowback
Weapon Platform
Weapon Platform
Assault Rifle, AK, AK Variant, AK-12,
Magazine Style Icon
Magazine Style
Long Gun Magazine, Assault Rifle, AK Platform, WELL PRO AK-12 GBB Magazines,
Fire Select Icon
Fire Selector
PatrolBase | Fire Select Safe
Safe
Patrol Base | Fire Select - Semi Automatic
Semi Automatic
Patrol Base | Full Automatic
Full Automatic
Weapon Safety Features Icon
Safety Features
Trigger Lock
Shooter Configuration Icon
Shooter Configuration
Right Handed
Weapon Configuration Icon
Weapon Configuration
Standard
Weapon Scale Icon
Weapon Scale
1:1
Suggested BB Weight
Suggested BB Weight
0.25g

Hop-Up

Hop-Up Unit Icon
Hop-Up Unit
Yes
Hop-Up Unit Adjuster Icon
Hop-Up Adjuster
Gear
Hop-Up Unit Location Icon
Hop-Up Location
Inside the receiver on the left side of the barrel base. Accessible with the top cover, recoil spring assembly & bolt carrier removed.

Furniture

Weapon Furniture Icon
Furniture
  • Railed Handguard
  • Railed Receiver
  • Ambidextrous Magazine Release
  • Ambidextrous Fire Selector
  • Ergonomic Pistol Grip
  • Adjustable Cheek Rest
  • Side folding retractable stock
  • Aperture iron sights
  • Bird Cage Flash Hider
  • Threaded Outer Barrel
  • QD Sling Point
  • Enlarged Trigger Guard
  • sling points front and rear
  • Extended magazine catch
  • Rubber butt plate
Rail System Icon
Rail System
20mm RIS / RAS, 20mm Railed Receiver,
Icon Stock Positions
Stock Setting
Sliding, Multi-Position, Folding, Adjustable cheek riser,
Weapon Length Extended
Stock Positions
7 Position
Sight Type Icon
Sight Type
Iron Sights, Aperture Iron Sight,
Sling Plate Icon
Sling Options
Stock, QD, Loop, Barrel,

Barrel

Outer Barrel Length (in)
12.4''
Icon Thread Type
Outer Barrel Thread Type
Male
Icon Thread Direction
Outer Barrel Thread Direction
CCW (Counter Clockwise)
Outer Barrel Thread Size
Outer Barrel Thread Size
14mm
Inner Barrel Diameter
Inner Barrel Diameter
6.03mm
Inner Barrel Length
Inner Barrel Length
360mm

Magazine Specific

Magazine Type
Magazine Type
Gas, Low Capacity,
Magazine BB Capacity
Magazine BB Capacity
Approx. 35 Rounds
Magazine BB Fill Method
Magazine BB Fill Method
Speed Loader
Magazine BB Fill Location
Magazine BB Fill Location
Top
Magazine Gas Fill Location
Magazine Gas Fill Location
Back
Magazine Gas Type
Magazine Gas Type
Green Gas

Gas Gun Specific

Gas Can Icon
Gas Compatability
Summer Gas, Green Gas, Red Gas,
Gas Can Icon
Gas Recommendation
Green Gas

Pistol Specific

Construction Icon
Slide Material
Alloy
Icon Pistol Slide
Pistol Slide Type
Bolt Carrier

Product Testing Data

Notepad Icon
Test Description
320 FPS +/- 10% - Adjustable via NPAS Valve
Notepad Icon
Tested Using
0.20g Delta Armory Diamond BBs & VORSK V6 Green Gas
Notepad Icon
Test Date
04/06/2025

Size guide

Joule Charts

Special Instructions

These table can be used as a reference to see if the BB weight you are using will be over acceptable Joulage limits at some Airsoft Sites in the UK. To check if the weight can be used chrono your weapon using the BB you intend to use, and then compare it to the chart.

FPS, Power and Joule Limits can vary from site to site, so please get in touch with where you're going to play with in advance to avoid disappointment.

Suggested limits are based on Joulage Limit rules used Halo Mill: Proving Grounds, with a 350fps limit for Automatic Replicas, 400fps for Semi-Automatic Replicas, and 500fps for Bolt Action Replicas.

Tap the tabs below to open the relevant chart for your replica.

Suggested limits are based on Joulage Limit rules used Halo Mill: Proving Grounds, and is the equivalent of 350fps, using 0.20g BB resulting in an upper limit of 1.14j.

Velocity BB Weight (Grams)
FPS 0.20 0.25 0.28 0.30 0.32 0.36 0.40 0.43 0.45 0.50
250 0.58 0.73 0.81 0.87 0.93 1.05 1.16 1.25 1.31 1.45
260 0.63 0.79 0.88 0.94 1.00 1.13 1.26 1.35 1.41 1.57
270 0.68 0.85 0.95 1.02 1.08 1.22 1.35 1.46 1.52 1.69
280 0.73 0.91 1.02 1.09 1.17 1.31 1.46 1.57 1.64 1.82
290 0.78 0.98 1.09 1.17 1.25 1.41 1.56 1.68 1.76 1.95
300 0.84 1.05 1.17 1.25 1.34 1.51 1.67 1.80 1.88 2.09
310 0.89 1.12 1.25 1.34 1.43 1.61 1.79 1.92 2.01 2.23
320 0.95 1.19 1.33 1.43 1.52 1.71 1.90 2.05 2.14 2.38
325 0.98 1.23 1.37 1.47 1.57 1.77 1.96 2.11 2.21 2.45
328 1.00 1.25 1.40 1.50 1.60 1.80 2.00 2.15 2.25 2.50
330 1.01 1.26 1.42 1.52 1.62 1.82 2.02 2.18 2.28 2.53
335 1.04 1.30 1.46 1.56 1.67 1.88 2.09 2.24 2.35 2.61
340 1.07 1.34 1.50 1.61 1.72 1.93 2.15 2.31 2.42 2.68
345 1.11 1.38 1.55 1.66 1.77 1.99 2.21 2.38 2.49 2.76
350 1.14 1.42 1.59 1.71 1.82 2.05 2.28 2.45 2.56 2.85
355 1.17 1.46 1.64 1.76 1.87 2.11 2.34 2.52 2.63 2.93
360 1.20 1.51 1.69 1.81 1.93 2.17 2.41 2.59 2.71 3.01

Suggested limits are based on Joulage Limit rules used at Halo Mill: Proving Grounds, and is the equivalent of 400fps, using 0.20g BB resulting in an upper limit of 1.49j.

Velocity BB Weight (Grams)
FPS 0.20 0.25 0.28 0.30 0.32 0.36 0.40 0.43 0.45 0.50
250 0.58 0.73 0.81 0.87 0.93 1.05 1.16 1.25 1.31 1.45
260 0.63 0.79 0.88 0.94 1.00 1.13 1.26 1.35 1.41 1.57
270 0.68 0.85 0.95 1.02 1.08 1.22 1.35 1.46 1.52 1.69
280 0.73 0.91 1.02 1.09 1.17 1.31 1.46 1.57 1.64 1.82
290 0.78 0.98 1.09 1.17 1.25 1.41 1.56 1.68 1.76 1.95
300 0.84 1.05 1.17 1.25 1.34 1.51 1.67 1.80 1.88 2.09
310 0.89 1.12 1.25 1.34 1.43 1.61 1.79 1.92 2.01 2.23
320 0.95 1.19 1.33 1.43 1.52 1.71 1.90 2.05 2.14 2.38
330 1.01 1.26 1.42 1.52 1.62 1.82 2.02 2.18 2.28 2.53
340 1.07 1.34 1.50 1.61 1.72 1.93 2.15 2.31 2.42 2.68
350 1.14 1.42 1.59 1.71 1.82 2.05 2.28 2.45 2.56 2.85
360 1.20 1.51 1.69 1.81 1.93 2.17 2.41 2.59 2.71 3.01
370 1.27 1.59 1.78 1.91 2.03 2.29 2.54 2.73 2.86 3.18
380 1.34 1.68 1.88 2.01 2.15 2.41 2.68 2.88 3.02 3.35
390 1.41 1.77 1.98 2.12 2.26 2.54 2.83 3.04 3.18 3.53
400 1.49 1.86 2.08 2.23 2.38 2.68 2.97 3.20 3.34 3.72
410 1.56 1.95 2.19 2.34 2.50 2.81 3.12 3.36 3.51 3.90

Suggested limits are based on Joulage Limit rules used at Halo Mill: Proving Grounds, and is the equivalent of 500fps, using 0.20g BB resulting in an upper limit of 2.32j.

Velocity BB Weight (Grams)
FPS 0.20 0.25 0.28 0.30 0.32 0.36 0.40 0.43 0.45 0.50
250 0.58 0.73 0.81 0.87 0.93 1.05 1.16 1.25 1.31 1.45
260 0.63 0.79 0.88 0.94 1.00 1.13 1.26 1.35 1.41 1.57
270 0.68 0.85 0.95 1.02 1.08 1.22 1.35 1.46 1.52 1.69
280 0.73 0.91 1.02 1.09 1.17 1.31 1.46 1.57 1.64 1.82
290 0.78 0.98 1.09 1.17 1.25 1.41 1.56 1.68 1.76 1.95
300 0.84 1.05 1.17 1.25 1.34 1.51 1.67 1.80 1.88 2.09
310 0.89 1.12 1.25 1.34 1.43 1.61 1.79 1.92 2.01 2.23
320 0.95 1.19 1.33 1.43 1.52 1.71 1.90 2.05 2.14 2.38
330 1.01 1.26 1.42 1.52 1.62 1.82 2.02 2.18 2.28 2.53
340 1.07 1.34 1.50 1.61 1.72 1.93 2.15 2.31 2.42 2.68
350 1.14 1.42 1.59 1.71 1.82 2.05 2.28 2.45 2.56 2.85
360 1.20 1.51 1.69 1.81 1.93 2.17 2.41 2.59 2.71 3.01
370 1.27 1.59 1.78 1.91 2.03 2.29 2.54 2.73 2.86 3.18
380 1.34 1.68 1.88 2.01 2.15 2.41 2.68 2.88 3.02 3.35
390 1.41 1.77 1.98 2.12 2.26 2.54 2.83 3.04 3.18 3.53
400 1.49 1.86 2.08 2.23 2.38 2.68 2.97 3.20 3.34 3.72
410 1.56 1.95 2.19 2.34 2.50 2.81 3.12 3.36 3.51 3.90
420 1.64 2.05 2.29 2.46 2.62 2.95 3.28 3.52 3.69 4.10
430 1.72 2.15 2.40 2.58 2.75 3.09 3.44 3.69 3.86 4.29
440 1.80 2.25 2.52 2.70 2.88 3.24 3.60 3.87 4.05 4.50
450 1.88 2.35 2.63 2.82 3.01 3.39 3.76 4.04 4.23 4.70
460 1.97 2.46 2.75 2.95 3.15 3.54 3.93 4.23 4.42 4.91
470 2.05 2.57 2.87 3.08 3.28 3.69 4.10 4.41 4.62 5.13
480 2.14 2.68 3.00 3.21 3.42 3.85 4.28 4.60 4.82 5.35
490 2.23 2.79 3.12 3.35 3.57 4.02 4.46 4.80 5.02 5.58
500 2.32 2.90 3.25 3.48 3.72 4.18 4.65 4.99 5.23 5.81
510 2.42 3.02 3.38 3.62 3.87 4.35 4.83 5.20 5.44 6.04