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NBS 16″ 5.56 NATO 1:7 Twist Black Nitride Mid-Length Barrel
NBS 16″ 7.62x39mm Heavy Contour 1:10 Carbine 41V50 Barrel – Parkerized
NBS 16″ .223 Wylde Lightweight Contour 1:8 Midlength 41V50 Barrel – Parkerized
Superlative Arms .625 Adjustable Gas Block – Solid – Stainless Steel
Strike Industries Venom Flash Hider Muzzle Device in .308
Faxon Firearms 16″ GUNNER 5.56 NATO Mid-Length 4150 Nitride / Melonite Barrel
Ballistic Advantage 16″ 5.56 Government Profile Midlength AR-15 Barrel, Modern Series
NBS 16″ 5.56 NATO 1:7 Mid-Length Lightweight Barrel – Black Nitride
Faxon Firearms Match Series 16″ PENCIL .223 Wylde Mid-Length 416-R Stainless Nitride / Melonite 5R Nickel Teflon Extension Barrel
Ballistic Advantage 16″ 5.56 BA Hanson Midlength Performance Series Barrel w/ Pinned .750 Lo Pro Gas Block
ASC AR-15 6.8 SPC 10RD Magazine – Black SS
Aero Precision AR-15 Complete Upper, 16″ 5.56 Carbine Barrel with Pinned FSB & M4 Handguard
NBS 7.5″ 9mm 1:10 Heavy Barrel – Black Nitride
NBS 20″ Slick Side Billet .224 Valkyrie Spiral Fluted Complete Upper
NBS 20″ 6.5 Grendel II Heavy Contour 1:8 Rifle Length 416R Barrel – Fluted – Stainless
NBS 16″ Carbine 5.56 NATO 1:7 Complete Upper
NBS 16″ 6.5 Grendel II M4 Contour 1:8 Carbine 416R Barrel – Straight Fluted – Black Nitride
NBS 16″ 5.56 Parkerized 1:7 Carbine Length Barrel
NBS 16″ 5.56 NATO 1:8 Carbine Length M4 Barrel – Black Nitride
NBS 16″ .223 WYLDE Parkerized 1:7 Carbine Length Barrel
NBS 16″ .223 Wylde 1:8 Parkerized Carbine Length Barrel
NBS 14.5″ Mid-Length 5.56 NATO 1:7 Complete Upper w/ Front Sight Base
NBS 14.5″ (16″ Overall) Mid-Length 5.56 NATO 1:7 Complete Upper w/ FSB and Pinned VG6 Precision Epsilon Muzzle Brake
16″ Mid-Length Bare Bones Barreled Upper Combo Kit