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M31 Rear Sight Screw M31 Spring Mount Forward Sear M31 Trigger Spring
Please indicate what series of M31 Trigger Spring you need.
M31 Safety Spring M31 FIRING PIN RETURN SPRING M31Washer, Buffer
M31 Safety Spring
Price: $3.00
M31Washer, Buffer
Price: $4.00
M31FIRING PIN RETURN SPRING M31Washer, Buffer
M31Pin, Firing Pin Cross PIN QTY 2 M31 Hammer Spring M31 Shroud Shim
M31 Hammer Spring
Price: $5.00
M31 Shroud Shim
Price: $6.00
M31Pin, Firing Pin Cross PIN QTY 2 M31Spring, Hammer Right shroud shim
M31 Charging Handle Return Spring M31 Firing Pin Bushing M31 Semi Auto Charging Block
M31 Charging Handle Return Spring. This spring keeps the cocking handle assembly in the forward position after cocking the rifle. M31 Firing pin Bushing for the M31 Semi Auto bolt. This bushing is pressed in to the front of the bolt forming the primer pocket. M31 Charging Block connects to the stock charging handle but is taller for better engagement into the Semi auto bolt.
M31 Trigger Bar M31 Firing Pin M31 Buffer Spring Cup
M31 Trigger Bar
Price: $12.00
M31 Firing Pin
Price: $12.00
M31 Trigger Bar M31 Firing Pin - M31 Semi-Automatic

Please indicate what series of M31 Firing Pin you need.
M31 SPRING CUP FOR BUFFER ASSEMBLY. THIS PART STOPS THE BOLT IN THE REAR POSITION ON THE M31 RIFLE. THE OTHER TWO COMPONENTS IN THIS ASSEMBLY ARE THE BUFFER WASHER AND THE RETURN SPRING. (SOLD SEPARATELY.)
M31 Semi Auto Receiver Assembly instructions  and BATF Approval Letter M31 Hammer M31Trigger Only Assembly
M31 Hammer
Price: $15.00
This packet includes the steps necessary to build your own M31 semi auto rifle. The BATF letter included lays out the rules for manufacturing and proper marking. Please look at PN M31S-GNPT-XX09-BKXX-RCKT for a complete diagram. M31 Hammer M31Trigger Only Assembly
M31 Rear Sight Assembly M31 Receiver Center Section semi auto M31 Small Parts Kit
M31 Small Parts Kit
Price: $29.00
M31 Rear Sight Assembly M31Center Section for the semi auto rifle. Refer to PN   M31S-GNPT-XX09-BKXX-RCKT for complete assembly diagram. THIS KIT INCLUDES ALL OF THE SPRINGS AND FIRING PIN FOR THE M31 SEMI AUTO.
M31 Suomi 36 Round Stick Magazine M31 Y-Series Striker M31 End Cap SEMI AUTO, SPRING GUIDE SHORTENED.
M31 Suomi 36 Round Stick Magazine and M31 Suomi Stick Magazine Modified to 10 rounds for states with restrictions M31 Y-Series Striker M31End Cap SEMI AUTO, SPRING GUIDE SHAFT SHORTENED.
M31 80% Receiver Tube M31 Lower Receiver Section Machined M31 SEMI AUTO BOLT ASSEMBLY
This tube has a smaller ID than the original M31 machine gun. It is used in the construction of a Semi Auto M31 rifle. The slots on the top and bottom must be machined by the builder per BATF specifications. Refer to PN M31S-GNPT-XX09-BKXX-RCKT for complete diagram.

THIS M31 LOWER RECEIVER SECTION IS MACHINED FOR USE IN SEMI AUTO RIFLE. IT REPLACES THE TORCH CUT COMPONENT IN THE DESTROYED KITS.
Refer to PN M31S-GNPT-XX09-BKXX-RCKT for complete diagram.
M31 SEMI AUTO COMPLETE BOLT ASSEMBLY. THIS IS USED IN THE TNW DESIGNED SEMI AUTO RIFLE. THE DIAMETER OF THIS BOLT
IS SMALLER THAN A FULL AUTO BOLT AND MACHINED ON THE INSIDE TO ACCOMMODATE THE SEMI AUTO FIRING PIN.
M31 Semi Auto Home Built Receiver Kit M31 Semi-Auto Assembled Receiver (FFL Required)
This parts set is the for the manufacturing of a home built semi auto M31's receiver. These parts are available in this set, and are also sold individually.

The assembly, machining, and welding of these parts constitutes the manufacturing of a firearm and the BATF Letter provided with this set must be followed.
SOLD OUT - DISCONTINUED

This part must be shipped to an FFL in the U.S.


Contains:
Machined lower receiver section, M31 receiver center section, M31 semi-auto complete tube, M31 front trunnion, M31 ejector

All parts are welded together, de-burred, and parkerized.