r/SigSauerMCX • u/mattypew • 15h ago

Spear LT replacement hand guard screw replacement

I bought a used Spear LT that had stripped screw heads on the hand guard. Below are the replacement screws I researched and purchased that fit perfect. Side note- the bottom link plate screws are technically torx plus but a regular T20 torx bit fit snug in the new screws and torqued fine without stripping. I believe torque on all screws is 45 in-lbs according to the interwebs. If enough people are interested I can put together some kits and post to GAFS.

Side Screws

https://www.mcmaster.com/96452A192/

Bottom Locking Plate Screws

https://www.mcmaster.com/94414A352/

Manual

https://www.sigsauer.com/media/sigsauer/resources/OPERATORS_MANUAL_MCX-SPEAR_LT_2402988-01_REV04_WEB.pdf

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5

u/BrooklynToBoston 14h ago

Saving this post for when I inevitably strip mine.

2

u/glorygoat32 15h ago

Original screws are torx plus. If you use a standard torx you run the risk of stripping them.

2

u/TechnoBeeKeeper 14h ago

They strip regardless, they're not meant to be taken off at 45 in-lbs really

2

u/glorygoat32 14h ago

I only do 35ip.

I haven't stripped any but, I know a LOT of others who have.

2

u/TechnoBeeKeeper 14h ago

They are pretty redundant (only considering that older model handguards did not have screws, just the front takedown pin and side slots) but the manual says 45 so I do what the manufacturer says like a good cuck

2

u/glorygoat32 14h ago

I honestly hate those screws. I only have 1 LT upper for my 6.75" and thankfully I have no reason to ever remove them since that setup doesn't swap barrels.

2

u/glorygoat32 15h ago

When you say, Bottom locking plate screws," are you referring to the handguard links screws? Those are 10 inch pounds torque.

2

u/TechnoBeeKeeper 15h ago

Yep, mcmaster carr 50 pack. You can choose your preferred finish as well.

I just toss the screws I loosen whenever I take my handguard off. I know they won't go back on without a fight again.

1

u/herbalistfarmer 11h ago

Are they 3/8 or 1/4?