Home / Custom Builds / Custom Upper Builds / Custom .300 BLK AR-15 Pistol Upper 8″ – 11.5″ Custom .300 BLK AR-15 Pistol Upper 8″ – 11.5″$1,05000 3 Week Lead Time Handbuilt by NRC Industries, LLCIndustry Leading Quality Control & Warranty Esitmated shipping on December 26, 2024Cerakote OptionsCerakote No Yes ($200.00)$0.00Split Upper / Handguard Cerakote No YesCerakote ColorTungstenMagpul FDEMagpul OD GreenNoveske Bazooka GreenVortex BronzeBurnt BronzeMidnight BronzeSniper GreyTactical GreyArmor BlackMetallic Coyote ($25.00)OD Gunmetal ($25.00)Dark Tungsten ($25.00)Black Metallic ($25.00)$0.00Upper Receiver Cerakote ColorTungstenMagpul FDEMagpul OD GreenNoveske Bazooka GreenVortex BronzeBurnt BronzeMidnight BronzeSniper GreyTactical GreyArmor BlackMetallic Coyote ($25.00)OD Gunmetal ($25.00)Dark Tungsten ($25.00)Black Metallic ($25.00)$0.00Handguard Cerakote ColorTungstenMagpul FDEMagpul OD GreenNoveske Bazooka GreenVortex BronzeBurnt BronzeMidnight BronzeSniper GreyTactical GreyArmor BlackMetallic Coyote ($25.00)OD Gunmetal ($25.00)Dark Tungsten ($25.00)Black Metallic ($25.00)$0.00OptionsUpper ReceiverWilson Combat ForgedBCM M4 Forged ($30.00)Centurion CM4 Forged ($30.00)LMT Defense M4 Flattop ($140.00)SLR RIfleworks B15 Billet ($170.00)Willson Combat WC-15 Billet ($170.00)Willson Combat WC-15 Billet Lightweight ($170.00)Noveske N4 Gen3 Billet ($230.00)$0.00Pistol Barrel Length8" - 8.5"10" - 10.5"11.3" - 11.5"$0.008-8.5" Barrel Options8" Ballistic Advantage Modern Series8.3" Ballistic Advantage Hanson Performance ($55.00)8" Seekins Precision Black Finish Stainless Steel ($185.00)$0.0010" - 10.5" Barrel Options10" Ballistic Advantage Modern Series10.3" Ballistic Advantage Hanson Performance ($55.00)10.5" Noveske 416R Bead Blast Stainless Steel ($225.00)$0.0011.3" - 11.5" Barrel Options11.5" Lantac Raven Nitride Black 416R Stainless Steel ($75.00)11.3" Wilson Combat 416R Bead Blast Stainless Steel ($105.00)$0.00Handguard (8-8.5" Barrel)Midwest Industries Combat Rail 7" ($55.00)BCM MCMR 7" ($55.00)SLR Rifleworks ION Lite 7" ($145.00)SLR Rifleworks SOLO Lite 7" ($145.00)$0.00Handguard (10-10.5" Barrel)Midwest Industries Combat Rail 9.5" ($55.00)SLR Rifleworks ION Lite 9" ($145.00)SLR Rifleworks SOLO Lite 9" ($145.00)Geissele Automatics MK8 9.3" ($155.00)Geissele Automatics MK8 DDC 9.3" ($155.00)Geissele Automatics MK14 9.3" ($155.00)Geissele Automatics MK14 DDC 9.3" ($155.00)Geissele Automatics MK16 9.3" ($185.00)Geissele Automatics MK16 DDC 9.3" ($185.00)$0.00Handguard (11.3-11.5" Barrel)Wilson Combat M-LOK 10.4"Midwest Industries Combat Rail 10.5" ($55.00)SLR Rifleworks ION Lite 10.5" ($145.00)SLR Rifleworks SOLO Lite 10" ($145.00)Geissele Automatics MK8 10.5" ($155.00)Geissele Automatics MK8 DDC 10.5" ($155.00)Geissele Automatics MK14 10.5" ($155.00)Geissele Automatics MK14 DDC 10.5" ($155.00)Geissele Automatics MK16 10.5" ($185.00)Geissele Automatics MK16 DDC 10.5" ($185.00)$0.00Bolt Carrier GroupToolcraft Black NitrideToolcraft Nickel Boron ($30.00)Toolcraft Titanium Nitride (Gold Colored) ($60.00)Microbest Mil-Spec C-158 ($20.00)Microbest Chrome C-158 ($40.00)Wilson Combat Mil-Spec Phosphate ($60.00)Wilson Combat Black Nitride ($80.00)Wilson Combat Nickel Boron ($105.00)Noveske Mil-Spec ($80.00)Noveske Black Nitride ($120.00)Geissele Reliability Enhanced Nano ($215.00)$0.00Muzzle DeviceA2 Birdcage Flash HiderSilencerCo Flash Hider w/ ASR Suppressor MountSilencerCo Muzzle Brake w/ ASR Suppressor MountSons of Liberty NOX Flash Hider w/ KeyMo Suppressor Mount ($25.00)Dead Air Flash Hider w/ KeyMo Suppressor Mount ($25.00)Dead Air 3 Chamber Muzzle Brake w/ KeyMo Suppressor Mount ($25.00)OSS Huxwrx Flash Hider ($65.00)OSS Huxwrx Muzzle Brake ($70.00)Surefire SOCOM Flash Hider ($90.00)Surefire SOCOM Muzzle Brake ($90.00)Surefire SOCOM Warcomp Flash Hider 3 Prong ($90.00)Surefire SOCOM Warcomp Flash Hider Closed Tine ($90.00)Q Cherry Bomb ($40.00)$0.00Gas SystemLow Profile Non-AdjustableAero Precision Adjustable ($40.00)Q Honey Badger Adjustable ($70.00)Superlative Arms Bleed-Off Adjustable ($75.00)$0.00Charging HandleMil-SpecRadian Raptor Ambidextrous ($55.00)Radian Raptor Ambidextrous FDE ($55.00)Radian Raptor SD Ambidextrous ($95.00)Radian Raptor SD Ambidextrous FDE ($95.00)Geissele Automatics Ambidextrous ($75.00)Geissele Automatics Ambidextrous DDC (Tan Anodized) ($85.00)$0.00OpticsRed Dot / Holographic SightsSig Sauer Romeo5 2MOA Red Dot ($140.00)Sig Sauer MSR Red Dot & 3X Combo ($260.00)Holoson 403C 2MOA Red Dot ($160.00)Holoson 510C 2MOA Red Dot ($285.00)Holosun AEMS 2MOA Red Dot ($290.00)Trijicon MRO Full Co-Witness 2MOA Red Dot ($450.00)Trijicon MRO Full Co-Witness 2MOA Green Dot ($480.00)EOTECH 512 1 MOA Dot w/ 68 MOA Ring ($430.00)EOTECH EXPS2-0 1 MOA Dot w/ 68 MOA Ring ($540.00)EOTECH EXPS2-0 1 MOA Green Dot w/ 68 MOA Ring ($640.00)EOTECH EXPS2-0 Tan 1 MOA Dot w/ 68 MOA Ring ($600.00)EOTECH EXPS3-0 1 MOA Dot w/ 68 MOA Ring & NV Reticle ($675.00)Steiner T1XI 2MOA Black ($690.00)$0.00MagnifiersSig Sauer Juliet3 Micro 3X ($200.00)Sig Sauer Juliet3 3X ($285.00)Sig Sauer Juliet4 4X ($330.00)Sig Sauer Juliet6 6X ($375.00)Holosun HM3X ($190.00)Trijicon MRO HD 3X ($385.00)Eotech G33 3X ($540.00)Eotech G33 3X Tan ($540.00)Eotech G45 5X ($615.00)EOTECH G45 5X Tan ($615.00)$0.00ScopesGeissele SPR 1-6x26 DMRR-1 ($900.00)Sig Sauer MSR 1-10X26mm Coyote Brown BDC10 Reticle ($680.00)Trijicon ACOG 4X32 Red Chevron TA31F ($1,100.00)Trijicon ACOG 4X32 Green Chevron TA31F-G ($1,120.00)Trijicon ACOG 4X32 Green HS/DOT TRTA31H-G ($1,150.00)Trijicon Credo HX 1-6x24 SFP Red BDC ($850.00)Trijicon Credo HX 1-6x24 FFP Red MOA ($945.00)Trijicon Credo HX 2.5-10x56mm SFP Red MOA Precision Hunter ($850.00)Trijicon HX Tenmile 6-24X50 SFP MOA Red ($1,025.00)Sig Sauer TANGO6T 1-6X24mm Tan, FFP DWLR-556 Reticle ($2,075.00)EOTECH SCOPE VUDU 1-6X24MM 30MM FFP SR3 MOA BLACK ($1,320.00)EOTECH SCOPE VUDU 1-8X24MM 30MM SFP HC3 MOA BLACK ($1,330.00)EOTECH VUDU 1-10X28MM 34MM FFP SR4 MOA Black ($1,740.00)EOTECH VUDU 1-10X28MM 34MM FFP SR4 MOA TAN ($1,760.00)EOTECH SCOPE VUDU 5-25X50MM 34MM FFP MD4 MOA BLACK ($2,050.00)Steiner T6Xi 1-6x24mm FFP KC-1 Reticle ($1,690.00)Steiner M5XI 5-25X56mm MSR V2 FFP ($3,190.00)Steiner M7XI 4-28X56mm TRMR 3 FFP ($3,890.00)$0.00Tactical AccessoriesTactical AccessoriesPhase 5 M-LOK Handstop ($32.00)Slate Grip Rail Covers ($16.00)Magpul MS4 Dual QD Sling ($60.00)KRISS USA Steel Backup Iron Sights ($120.00)Surefire M340C Scout Pro 500 Lumen ($290.00)Surefire M640U Scout Pro 1000 Lumen ($290.00)Surefire M640V Scout Pro IR & White ($420.00)Surefire DS07 Tailcap & Pressure Pad ($150.00)Harris 6-9" Bipod ($145.00)ADM Quick Release 30mm Scope Mount ($225.00)Midwest Industries 30mm Scope Mount ($140.00)Holosun Dual Laser Sight - Green & IR ($525.00)Surefire Warden Blast Regulator - Black ($220.00)Surefire Warden Blast Regulator - FDE ($220.00)UNTIY Fast EOTECH Magnifier Mount & Riser ($340.00)$0.00 Options Price: $0.00 Product Price: $1,050.00 Total: $0.00 Custom .300 BLK AR-15 Pistol Upper 8" - 11.5" quantity Add to cart SKU: CUSTOM-300-BLK-PISTOL-UPPER Categories: Custom Builds, Custom Upper Builds Tags: .300 BLK, 10.3", 10.5", 11.5", 300 Blackout, 8.3", 8.5", 8", AR-15, BCM, Custom Pinned & Welded, Geissele, Midwest Industries, MK14, MK8, Wilson Combat Product ID: 7229 Additional information Additional information Caliber .300 Blackout / 300 BLK / 7.62x35mm Related products Custom Order Wilson Combat – 5.56 NATO – Vortex Bronze – 14.5″ Pinned & Welded Custom Order Wilson Combat – 5.56 NATO – Dark Tungsten – 16″ Custom Order Wilson Combat – 5.56 NATO – OD Gunmetal Cerakote – 11.3″ PDW Pistol $2,99000