This is a Leapers, Inc. - UTG Handguard known as the UTG PRO, model MTU019SS.
The UTG Pro model 4/15 rifle 15" super slim free float handguard has a proprietary attachment design and an extremely compact profile. It is super lightweight with a rail at the 12 o'clock position that forms a continuous picatinny top section. It includes three user detachable 2-slot rail sections.
Features:
Black finish
Fits AR rifles
15 handguard;Accommodates Low Profile Gas Block