Bill of Materials

Source file: ./assets/BOM.xlsx

Sheet1

Springs	Amount	Dimensions	URL
Thompson bolt spring	1	11.1mm x 89 x 0.894 or a .711 thickness	if in Aus bunnings.com.au
		I couldn’t find a local compression spring so I bought these extension springs and cut both the ends off and stretched it to the correct length of 220mm
Thompson Trigger spring	1	9.7mm x 15 x 0.5 compression spring	https://www.bunnings.com.au/hardware-elements-200-piece-spring-combination-pack_p3962610
Thompson Disconnector spring	1	4.3 mm x 8 x 0.5 compression spring	This was good value - im sure internationally you can get something similar
Thompson sear spring	1	5mm x 18 x 0.5 compression spring
Remington 870 carrier spring	1	5.6mm x 30mm compression spring	I used a 35mm that was in the combination pack
Remington 870 hammer spring	1	5.6 x 35 mm give or take compression spring	used the same spring as the carrier and just cut it down so it wasn’t too hard to push the hammer back
Remington 870 trigger spring	1	8.5 x 15 x 0.5 mm compression	in the bunnings pack also
Remington 870 extractor spring	1	4.3mm x 10 x 0.5mm	I used an extension spring from the bunnings kit - pulled it apart and cut the coil to 5mm length
Screws			** Please note spring lengths are approx, just play around with the lengths to suit the tension
Stock holder	4	3mm x 6
Front Vent to SPAS	1	3mm x 8
Rear vent to holder	1	3mm x 6
Holder to Remington	2	4mm x20
Holder to Thompson	2	countersunk 3mm x 10
front spas block	2	Countersunk 3mm x 6
Spas pump grip	2	countersunk 3mm x 8
Rear shroud clip	2	3mm x 6
Shroud plates lower	8 or six depending on the front plate	3mm x 6
Shroud upper	2	4mm x 30
Shroud upper dummy side	2	4mm x 10
Shroud counter surround	2	3mm x 6
Remington Receiver
trigger assembly front lower	1	3mm x 8 mm
trigger assembly rear	1	3mm x 20mm
trigger sear	1	3mm x 16mm countersunk
front hammer	1	3mm x 18mm
Thompson Grip to Lower frame	1	M4 x 117mm rod
Remington SPAS front GL block	4	M3 x 6mm Grub screw