You can find the Battle Arms Development Workhorse Upper 16" 5.56 1:7 15" M-LOK here Fast FREE shipping on this item!

The Battle Arms Development Workhorse Upper Receiver Group features a 16" barrel, 1:7 twist chambered in 5.56 NATO with a Mid Length gas system and BAD 15" Workhorse Free Float M-LOK handguard. The upper receiver is made from Forged 7075 T6 Aluminum with Hard Coat Anodizing and M4 feedramps. Does not include charging handle or bolt carrier group.

Barrel Length 16"
Caliber 5.56 NATO
Handguards BAD 15" Workhorse Free Float M-LOK
Sights None
Gas System Mid length
Muzzle Device A2 Flash Hider
Charging Handle Not Included
Bolt Carrier Group Not Included