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PDI Custom S&T USMC M40A3 Bolt Action Airsoft Sniper Rifle w/ PDI Internals (Model: Desert)

ID: 55431 (SR-M40A3-TN)
4.7 stars, based on 15 reviews
PDI Custom S&T USMC M40A3 Bolt Action Airsoft Sniper Rifle w/ PDI Internals (Model: Desert)
Hover or touch above to zoom
Optic and bipod shown in images not included

$240.00 $204.00

CanadaExport Compliant
This gun has a muzzle velocity rating (FPS) between 366 and 500, and is compliant for export to Canada.

No Payments + No Interest if paid in full in 6 months through PayPal Credit. Simply check out using PayPal and select PayPal Credit!

*Optic and bipod shown in images not includedThe S&T M40A3 is a collaboration between S&T and PDI Japan with a goal to create the highest value and performance on an Airsoft sniper rifle. Completely designed by the top designers and engineers from PDI Japan, the S&T M40A3 is equipped with stainless steel internal parts including a true stainless steel cylinder and steel sear that can withstand high power upgrades.

The M40, known for its years of service in the hands of US Marine Snipers, began its life as a modified military type-classified version of the M700 bolt action rifle. Through the years the M40 has seen various changes and upgrades to enhance its durability, reliability, as well as reduce its overall weight. Entering service in the early 2000's, the M40A3 with its lightened fiberglass stock has proven to be an incredibly robust, reliable, and accurate rifle.
The S&T M40A3 is a faithful replica of the USMC M40A3 with an internal built to dominate the Airsoft battle field. Taking the extra step, the S&T M40A3 is equipped out of the box with a PDI type internal system and 90 degree steel trigger sear. With over $150 value of upgraded internal parts already installed, this rifle is capable of operating at much higher FPS with just the change of a spring.


  • High quality nylon fiber reinforced polymer stock
  • High power stainless steel cylinder withstands the use ofhigh power upgrades. Designed by PDI Engineering in Japan
  • Full metal aluminum alloy barrel, trigger, and bolt assembly
  • Textured stock for improved grip
  • Adjustable cheek riser
  • Rubberized butt pad
  • New PDI type spring powered sniper rifle system (Compatible with Angel Custom VSR-10 springs and spring guides)
  • Smooth, high power spring action shoots up to 430+ FPS
  • PDI type steel trigger sear pre-installed
  • Harris style bipod lug (bipod sold separately)
  • Polymer 30rd magazine
  • 20mm optic rail
  • Smooth bolt and trigger pulls
Length: 1130mm
Inner Barrel: 455mm
Weight: 3234g
Magazine Capacity: 30rds
Muzzle Velocity: 410~430 (Measured with 0.20g BBs)
Fire Modes: Single shot, safety
System: PDI type High Power Spring System / VSR-10 compatible
Package Includes: Gun, Magazine, Manual
Hopup: Yes, Adjustable

Manufacturer: 6MM ProShop (USA Distribution) S&T (OEM)

About 6mmProShop

Established in 2011, 6mmProShop Inc. is a USA based manufacturer and distributor with a mission to bring law enforcement training, Airsoft sporting events, and military simulation to the next level. 6mmProShop features exclusive licensed products, unique innovations, and distribution rights of many exciting products from Japan, Europe, South America and Asia. With headquarters located in the USA, 6mmProShop offers unmatched product support, inventory availability for resellers, and world-wide exclusive products!

FPS: 430

California residents click here for Proposition 65 warning

15 Customer Reviews

(Write a review)

by Ryan H. on 02/23/2018
"In-depth Review:
First off, I would say that the description is a little misleading for this gun. It may be designed in Japan, but it's made in China which means cutting corners to reduce the cost to make the rifle. It is actually the same exact rifle as the CYMA M40a3 (only available from Asian sellers) and that one doesn't mention anything about PDI engineering. Nothing in this rifle is PDI. It's not worth the retail price of $240. The upgrades do not total more than $150 as the description says; maybe $50 for the metal trigger box.

-PDI STYLE hop-up. It has two hop arms so you can adjust it left or right. Descent quality however the pressure on the arms is created by an O-ring.
-Metal trigger box and steel 90 degree sear.
-More upgradeable than ASG M40a3

-Cheap plastic spring guide and piston
-Super cheap magazines, but they do feed.
-Kind of heavy (personal preference)
-Small bolt handle (personal preference)

-Hop up unit is proprietary unless you want to replace it with an actual PDI hop up unit
-Takes AEG barrels (only 455mm b/c the inner barrel goes all the way to the end cap)
-Cylinder is proprietary, but is steel
-Cylinder head appears to be a Snow Wolf M24 (NOT VSR)
-Piston and spring guide for Mb02/Mb03 fit inside the cylinder however the BAR10 set was too wide. The VSR spring did not fit however.
-Proprietary magazines, but take the same ones as the CYMA M40a3. Evike is the only US seller that has these magazines. Rest are in Asia.
-The butt pads and cheek rest do appear to be the same as ASG M40a3, so if you ever break them, you could check ASG.

It's a relatively new style gun so maybe in the coming years more companies like Well and JG will make clones. After that, maybe companies like Action Army, PDI, and Laylax will start making specific upgrades.

Overall, it's a little pricey, but it is the most upgradeable M40a3 platform on the market unless you get the M40a3 conversion kit for the VSR-10 or the Novritsch SSG24. It's a good stock gun if you don't plan on upgrading or a decent base if you do. Four stars.
by Jackie P. on 02/12/2018
"First let me say...
Holy crap this gun is way good for the price and no upgrades!
I would say it's an awesome beginner gun!
Now to the review!
first let's do pros and cons starting with pro's
-Very good material
-amazing fps with the 500fps spring and 32g bbs I would suggest heaver though!
-easy to take apart and clean.
-compatible with most vsr 10 mechanics!

Okay now some cons.
-Stock is not flush with the gun, it moves up and down but that can be fixed with camo tape or just normal tape
-mags are a little big. could be pro
-hopup can get in the way of your bolt pull and push you just have to tighten them an you should be fine.

And well there you go
personally I love this gun you should defiantly buy if this is going to be your first sniper rifle!
At first It looked huge and heavy but if you use it enough you'll forget about it.
and there you go A review on the PDI Custom S&T usmc M40A3!
by Westen A. on 06/15/2017
"Hello everybody, I am here to tell you guys all about this gun. Actually, I will give you pros and cons.

Pros: This gun is full metal except for the stock, Orange
Tip, and magazine.
This gun comes with a speed loader, a mag, a
Dejamming rod, a few manuals, and the gun with
Some tools.
This gun has some VSR 10 compatible parts.(I
Don't know exactly what but there is a review
That tells you)
The gun has unfathomable range and accuracy.
The packaging is nice.
The hop up is kind off weird to adjust, but once
You get it to where you want it, it's set.
The mag holds about 25-30 rounds.

Cons: The hop up is weird to adjust. All you do is
Pull the bolt back and don't push It forward,
Take out the mag, there will be 2 holes. Take the
Smallest Allen key and tighten or loosen them
Equally. (Tighten to less, loosen for more hop)
Also, out of the box, the outer barrel wobbles a
Little bit. It dint bother me, I just threw
Some electrical tape on it and it was fine.
The barrel is not threaded sadly.

Anyway, those are the pros and cons. I however did send mine back because I'm just not a sniper. I thought I was, but nah. I'm now getting the Ares AM-013.
It just was not my style. However if your a hardcore sniper on a 220 dollar budget, look no further. THX Evike.

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