Description

DIY Big Bore Kit (12.7x42/450 Bushmaster/458 Socom/350 Legend)

Product Specs:

Enlarged T Marked Upper Receiver with Forward assist and dust cover installed
Complete Lower Build Kit (with a 5.7 Ounce Buffer)
12" or 15" Keymod Rail (buyers choice)
16" Barrel w/ Magphos finish (chrome-moly lined)
This kit WILL come with the correct Bolt Carrier Group and a Standard Charging Handle.

This kit WILL NOT come with a muzzlebrake, as styles and availability are constantly changing.

This kit WILL NOTcome with the lower receiver, but utilizes a standard lower receiver.

All that is needed to finish this is a stripped lower, and a muzzlebrake.

The 450 Bushmaster and 458 Socom utilize a 5/8x32 brake, the 12.7x42 utilizes a 49/64-20 brake, the 350 Legend utilizes a 5/8x24 brake.

Comments (2)

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we can have that by next week. Just give us call 9-4 CST 816-844-9092 816-844-9092

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All I want is a 10.5” $299 .50 Beowulf complete upper with an MPI bolt. I know it’s possible.

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