Contact Us Tel:(626) 286-0360 Store Locations
Phone Support Hours M-F 7am-7pm PST
Browse by Type or Category
Happy President's Day! Use code PDAY2019 for 20% off! (Sale/MAP items exempt, click for Details)

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

ID: 53947 (SR-M40A3-OD)
4.6 stars, based on 16 reviews
PDI Custom S&T USMC M40A3 Bolt Action Airsoft Sniper Rifle w/ PDI Internals (Model: OD Green)
Hover or touch above to zoom
Optic and bipod shown in images not included
Youtube preview Product image 1 Product image 2 Product image 3 Product image 4 Product image 5 Product image 6 Product image 7

$240.00 $199.00

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


  • High quality textured nylon fiber reinforced polymer stock w/ adjustable cheek riser & rubberized butt pad
  • High power stainless steel cylinder withstands the use of high power upgrades. Designed by PDI Engineering in Japan
  • Aluminum alloy barrel, trigger, and bolt assembly
  • New PDI type spring powered sniper rifle system shoots up to 430+ FPS (Compatible with Angel Custom VSR-10 springs and spring guides)
  • PDI type steel trigger sear pre-installed
  • Harris style bipod lug (bipod sold separately)
  • 20mm optic rail
  • Smooth bolt and trigger pulls
*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.

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)

FPS: 430

About S&T

S&T is a group of Airsoft enthusiasts that produces rifles and parts based on the trends in the Airsoft industry. Their mission is to supply a wide range of quality products with the most competitive pricing for dealers and consumers alike. S&T was founded in 2009 with their HQ office located in Hong Kong, a subsidiary office in Japan, as well as Airsoft / Airgun manufacturing facilities in China.

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!

16 Customer Reviews

(Write a review)

by Tom g. on 08/15/2018
"Got this a few days ago, first impressions the gun is fairly heavy but not really a bad issue. I am writing this review because ALL of the screws on the gun were finger tight when the gun arrived. I tore it down and tightened everything and I saw the quality control sticker and almost laughed. I did a fair amount of research before I purchased this gun and was disappointed this gun wiggled and rattled as much as it did out of the box. The gun shoots far and hard but have not been able to chrono the 500 fps version yet. For those asking the hop up adjustment screws are where the nozzle slides into battery. The main barrel comes with an orange ring on the barrel and is not threaded for a suppressor of muzzle break. The barrel and action are attached to the rifle body with two screws in front of and behind the trigger. The rail for the scope was also scary loose. It is worth mentioning the the magazine snaps into the mag well with a very small "foot" at the front of the mag.

The cheek riser is adjusted by four thumb screws and is easy to adjust. The rifle butt spacers slide out for adjustment.

I really like the rifle and as soon as I get it sighted and chrono'd I'll make a more complete review but for now I'll give the rifle 4/5 stars only because the gun was so poorly put together.
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!

Questions, Answers and Comments

Discuss about PDI Custom S&T USMC M40A3 Bolt Action Airsoft Sniper Rifle w/ PDI Internals (Model: OD Green) with your friends and fellow shoppers!

Comment or answer questions for a chance to win awesome prizes. Details can be found on the Facebook page. Remember to check "Also post on Facebook" when commenting to qualify for the giveaways!

Have an urgent question about this item? We monitor these comments daily, but it may be faster to email us directly or call us at (626) 286-0360. Our resident experts are standing by to answer your questions!

California Proposition 65 Warning: Cancer and Reproductive Harm -

Search tags for related products