Battle Arms Development Workhorse LT Builders Kit 16in 223 Wylde 15in M-LOK Black. It features a forged 7075-T6 aluminum upper receiver a free-float 7-sided M-LOK handguard with full-length Picatinny top rail and a 4150 chrome-moly black nitride barrel individually headspaced with a matching 9310 steel bolt and 8620 black nitride carrier. Upgraded components include the BATTLEARMS enhanced trigger guard enhanced takedown/pivot pins enhanced magazine release one-piece magazine catch bolt catch and single-side safety. The kit includes everything needed to complete a build EXCEPT a stripped lower receiver. Not a firearm; ships direct to customer (no FFL required). Specifications for Battle Arms Development Workhorse LT Builders Kit: Manufacturer: Battle Arms Development Color: Black Gun Make: AR Platform Features of Battle Arms Development Workhorse LT Builders Kit: Forged WORKHORSE 7075-T6 aluminum upper receiver Free-float 7-sided M-LOK handguard with full-length 12 o'clock Picatinny rail 4150 chrome-moly steel black nitride barrel Individually headspaced 9310 bolt with 8620 black nitride carrier Enhanced trigger guard takedown/pivot pins mag release bolt catch Everything needed except stripped lower receiver Package Contents: Battle Arms Development Workhorse LT Builders Kit Battle Arms Development BAD-WH-LT-BUILDERS-KIT: Workhorse LT Builders Kit 16in 223 Wylde 15in M-LOK Black