Check the listing for details. Bellm Contender INTERLOCK SAFETY SPRING Thompson Center Arms T/C Thompson Center. Condition: New. Listed at 11.00 USD. Interlock Safety Spring TC Contender (61) Replace your worn spring with a new BELLM Interlock Safety Spring. A direct replacement, fits most generation TC Contenders. CNC manufactured in the USA Auction is for SPRING ONLY, picture of other components for reference only. With the trigger guard removed, a flat head screw driver to remove the Interlock Safety Screw (59). You should be able to replace without removing the sear, but not a bad idea to replace sear and safety block spring at the same time. Mike Bellm's TCs has been serving the TC shooting community for over 30 years, you are buying from the trusted TC Encore and Contender expert. Small parts orders and other auctions can be combined shipping, your Bellm parts will be packaged by the Pros.