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PDI Custom S&T USMC M40A3 Bolt Action Airsoft Sniper Rifle w/ PDI Internals (Model: Desert/500 FPS)

ID: 63724 (SR-M40A3-TN-500)
CM.700 TAN-500
S&T859188637245CM.700 TAN-50063724
4.7 stars, based on 20 reviews
PDI Custom S&T USMC M40A3 Bolt Action Airsoft Sniper Rifle w/ PDI Internals (Model: Desert/500 FPS)
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Optic and bipod shown in images not included
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FPS: 500

*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.Upgraded in house with 500 FPS 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)
  • In house upgraded to shoot at a blistering 500 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: ~500 (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 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 worldwide exclusive products!

20 Customer Reviews

(Write a review)

by Slater U. on 07/21/2019
"I got this gun about a year ago and there are more pros than cons,
Adjustable hop up
500 FPS pre upgraded
High mag capacity
The weight is a little much for a beginner
Stock does not perfectly fit the receiver

Overall a very good gun
by John F. on 06/24/2019
"I received this rifle in the recent Father's Day BOA and I was very excited. I had always wanted a sniper rifle and was especially pleased that the model I received was already OD Green.

Solid as a rock. On its first day to the field, I dropped it pretty hard, ran it through the bushes, not a scratch. Very pleased with the quality.
The stainless steel cylinder coming stock drew compliments from other players who were looking to put such upgrades into their ASG Sportline M40A3 rifles.
Even though I have the lower FPS version, I could send out .32 bbs to 200ft with good accuracy.
Weight and size is perfect for me
My rifle actually came with a 500fps spring that I hope to put in it soon so I can fire heavier BBs and get better range.

Trigger can get stuck on rare occasion
Hop up is difficult to get dialed in due to two allen key screws that have to be tighten/loosened together, though once set, the hop up works well.

I would suggest a 3x-9x scope. Right around 4x-6x is where I keep mine. Anything higher is overkill for the range.
I would also suggest a tightbore barrel but honestly, that's a key upgrade for every sniper and almost every airsoft gun that doesn't come with one.

Overall, it's a great gun and a wonderful weapon for someone like me, who wants a gun that performs great and feels solid out of the box.
by Vera M. on 05/04/2019

Amazing For The Price
VSR Compatible
Heavy (For Realism)
Adjustable Hop-Up
Nice Externals


Mags Are Not The Best (But Still Work Decently)

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