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| Best Seller  | Guntec USA AR-15 Mil-Spec Buffer Tube Set 6-position CAR Buffer/Spring/End Plate/Castle Nut Flat Dark Earth MILTUBESET-FDE. These AR15 Lower Parts by Guntec USA are constructed from T6 aluminum for a durable yet lightweight platform. This Guntec USA... ... more | FREE shipping go to store |
 | Sharps Bros. AR-15 Billet Stripped Upper Receiver w/Forward Assist 7075-T6 Aluminum Black Anodized SBUR04. lower receivers perfectly and has a mil-spec front end that is compatible with any AR15 barrel nut and any AR15 handguard out there including... ... more | FREE shipping go to store |
| Best Seller  | Forward Controls Design Ar-15 Billet Castle Nut - Ar-15 Billet Castle Nut Black The TDP spec castle nut is a simple and robust fastener that is almost perfect for the job it's tasked to perform. CNF (Castle Nut, Forward Controls) is based on the TDP spec castle nut, with now 4 staking notches that are longer and deeper (30 degrees... ... more
Forward Controls Design Ar-15 Billet Castle Nut - Ar-15 Billet Castle Nut Black The TDP spec castle nut is a simple and robust fastener that is almost perfect for the job it's tasked to perform. CNF (Castle Nut, Forward Controls) is based on the TDP spec castle nut, with now 4 staking notches that are longer and deeper (30 degrees... | go to store |
 | AT3 Tactical AR-15 Slick Side Billet Upper Receiver Burnt Bronze AT3-UPPER-BB AT3 Tactical AR-15 Slick Side Billet Upper Receiver Burnt Bronze AT3-UPPER-BB. These AR15 Upper Receivers made by AT3 Tactical have no forward assist a dust cover and match with mil-spec lower receivers for a reliable fit every time. The AT3 Tactical... ... more | FREE shipping go to store |
 | V Seven Weapon Systems Ar-15 Qd Endplate & Castle Nut Combo Titanium - Ar-15 Qd Endplate & Castle Nu Combo Pack Includes Both The Titanium Qd Endplate And Titanium Castle Nut. Mfg: V Seven Weapon Systems ... more
V Seven Weapon Systems Ar-15 Qd Endplate & Castle Nut Combo Titanium - Ar-15 Qd Endplate & Castle Nu Combo Pack Includes Both The Titanium Qd Endplate And Titanium Castle Nut. Mfg: V Seven Weapon Systems | go to store |
 | TangoDown AR-15 Castle Nut Wrench SKU - 535373 The TangoDown AR-15 Castle Nut Wrench has a 3/8 drive hole on either side of the wrench, laser marked for proper use. Use a breaker bar on the left for Nut removal, or a Torque wrench for proper tightening on the right. Either direction forces the... ... more
TangoDown AR-15 Castle Nut Wrench SKU - 535373 The TangoDown AR-15 Castle Nut Wrench has a 3/8 drive hole on either side of the wrench, laser marked for proper use. Use a breaker bar on the left for Nut removal, or a Torque wrench for proper tightening on the right. Either direction forces the... | go to store |
 | Fix It Sticks AR-15 Accessory Bit Pack SKU - 336707 The Fix It Sticks AR-15 Accessory Bit Pack contains three bits designed to aid in maintaining and working on an AR-15. Includes Bolt Carrier Group Scraper Bit, Castle Nut Wrench Bit, and A2 Front Sight Bit. NoteIntegrates perfectly with Fix It Sticks... ... more
Fix It Sticks AR-15 Accessory Bit Pack SKU - 336707 The Fix It Sticks AR-15 Accessory Bit Pack contains three bits designed to aid in maintaining and working on an AR-15. Includes Bolt Carrier Group Scraper Bit, Castle Nut Wrench Bit, and A2 Front Sight Bit. NoteIntegrates perfectly with Fix It Sticks... | go to store |
 | V Seven Weapon Systems Ar-15 Castle Nut Titanium - Ar-15 Castle Nut Ti Blk Grade 5 Titanium Raw Ti Finish Or Ionbond Black Mil-Spec Compatible Weighs 9.7 Grams Drilled Hole On Side Allows Castle Nut To Be Installed/Tightened W/ A Single Point Hook Style Wrench Found On Most Ar Multi Tools. Made In The United States Mfg: V... ... more
V Seven Weapon Systems Ar-15 Castle Nut Titanium - Ar-15 Castle Nut Ti Blk Grade 5 Titanium Raw Ti Finish Or Ionbond Black Mil-Spec Compatible Weighs 9.7 Grams Drilled Hole On Side Allows Castle Nut To Be Installed/Tightened W/ A Single Point Hook Style Wrench Found On Most Ar Multi Tools. Made In The United States Mfg: V... | go to store |
 | Ergo Grips Ar-15 Receiver Extension Castle Nut - Ar-15/M16 M4 Receiver Castle Nut Falcon Industries/ERGO brings this receiver extension castle nut for M4 style receiver extension tubes. Mfg: Ergo Grips ... more
Ergo Grips Ar-15 Receiver Extension Castle Nut - Ar-15/M16 M4 Receiver Castle Nut Falcon Industries/ERGO brings this receiver extension castle nut for M4 style receiver extension tubes. Mfg: Ergo Grips | go to store |
 | V Seven Weapon Systems Ar-15 Castle Nut Titanium - Ar-15 Castle Nut Ti Raw Grade 5 Titanium Raw Ti Finish Or Ionbond Black Mil-Spec Compatible Weighs 9.7 Grams Drilled Hole On Side Allows Castle Nut To Be Installed/Tightened W/ A Single Point Hook Style Wrench Found On Most Ar Multi Tools. Made In The United States Mfg: V... ... more
V Seven Weapon Systems Ar-15 Castle Nut Titanium - Ar-15 Castle Nut Ti Raw Grade 5 Titanium Raw Ti Finish Or Ionbond Black Mil-Spec Compatible Weighs 9.7 Grams Drilled Hole On Side Allows Castle Nut To Be Installed/Tightened W/ A Single Point Hook Style Wrench Found On Most Ar Multi Tools. Made In The United States Mfg: V... | go to store |
 | Luth-Ar Ar-15 Mba-3/Mba-4 Carbine Castle Nut - Ar-15 Mba-3/Mba-4 Carbine Castle Nut Black Steel FITS: The Luth-AR Carbine Lock Ring/Castle Nut for MBA-3 and MBA-4 Carbine Buffer Kits, as well as any Mil-Spec or Commercial Carbine receiver extension. Mfg: Luth-Ar ... more
Luth-Ar Ar-15 Mba-3/Mba-4 Carbine Castle Nut - Ar-15 Mba-3/Mba-4 Carbine Castle Nut Black Steel FITS: The Luth-AR Carbine Lock Ring/Castle Nut for MBA-3 and MBA-4 Carbine Buffer Kits, as well as any Mil-Spec or Commercial Carbine receiver extension. Mfg: Luth-Ar | go to store |
 | TRYBE Defense AR-15 Buffer & Spring Mil-Spec w/ Buffer Tube End Plate & Castle Nut BUFFMILBTEPCN TRYBE Defense AR-15 Buffer & Spring Mil-Spec w/ Buffer Tube End Plate & Castle Nut BUFFMILBTEPCN. TRYBE Defense makes an awesome 3 oz Carbine buffer and Mil-Spec Carbine Buffer spring that will help your build function perfectly. Specifications for... ... more | FREE shipping go to store |
 | Guntec USA AR-15 Mil-Spec Buffer Tube Set 6-position CAR Buffer/Spring/End Plate/Castle Nut Anodized Green MILTUBESET-GREEN. These AR15 Lower Parts by Guntec USA are constructed from T6 aluminum for a durable yet lightweight platform. This Guntec USA... ... more | FREE shipping go to store |
 | Primary Weapons Systems Ratchet Lock End Plate & Castle Nut Set Black AR-15 4BTRLPB-1F Primary Weapons Systems Ratchet Lock End Plate & Castle Nut Set Black AR-15 4BTRLPB-1F. These AR15 Lower Parts from Primary Weapons Systems are made of 4140 steel and can be removed easily if needed. The Primary Weapons Systems End Plate & Castle Nut... ... more | go to store |
 | Sharps Bros Ar-15 Billet Upper Receiver - Ar-15 Billet Upper Receiver Assembled The SBUR04 matches all of the Sharps Bros lower receivers perfectly and has a mil-spec front end that is compatible with any AR15 barrel nut & any AR15 handguard out there, including those with rear facing tabs. This receiver is meant for .223, 5.56,... ... more
Sharps Bros Ar-15 Billet Upper Receiver - Ar-15 Billet Upper Receiver Assembled The SBUR04 matches all of the Sharps Bros lower receivers perfectly and has a mil-spec front end that is compatible with any AR15 barrel nut & any AR15 handguard out there, including those with rear facing tabs. This receiver is meant for .223, 5.56,... | go to store |
 | Guntec USA AR-15 Extreme Duty Wide Castle Nut For Car/M4 Buffer Tube Matte Rainbow Pvd Coated CASTLE-EXD-M-RPVD. The wide design of this AR15 Wide Castle Nut by Guntec USA makes the area around the buffer tube much less prone to snags and breakage... ... more | go to store |
 | Primary Weapons Ar-15 Ratchet Castle Nut Qd End Plate Set - Rachet Castle Nut Qd End Plate Set The Primary Weapons Systems Ratchet Lock Castle Nut End Plate set works with mil-spec or commercial buffer tubes and is an alternative to staking. A quick upgrade to any rifle build, the Ratchet Lock Castle Nut End Plate features a QD mount and easy... ... more
Primary Weapons Ar-15 Ratchet Castle Nut Qd End Plate Set - Rachet Castle Nut Qd End Plate Set The Primary Weapons Systems Ratchet Lock Castle Nut End Plate set works with mil-spec or commercial buffer tubes and is an alternative to staking. A quick upgrade to any rifle build, the Ratchet Lock Castle Nut End Plate features a QD mount and easy... | go to store |
 | Spikes Tactical Ar-15 Castle Nut Wrench - Castle Nut Wrench Chromoly-steel wrenches accept standard torque wrench drives and help quickly assemble AR-15 rifles. Wrenches feature black phosphate finish for resistance to wear and corrosion, and Spikes Tactical logo. Castle Nut Wrench accepts 3/8" drive and has... ... more
Spikes Tactical Ar-15 Castle Nut Wrench - Castle Nut Wrench Chromoly-steel wrenches accept standard torque wrench drives and help quickly assemble AR-15 rifles. Wrenches feature black phosphate finish for resistance to wear and corrosion, and Spikes Tactical logo. Castle Nut Wrench accepts 3/8" drive and has... | go to store |
 | Forward Controls Design Ar-15 Handguards M-Lok 5.56mm - Ar-15 Handguard 15in. M-Lok Black $20 off $200+. Use code SEPT20RHF (Railed Handguard, Forward Controls) is based on the superb CMT UHPR Mod2, with full length 1913 rails at 12 o'clock, and MLOK at 3, 6, and 9 o'clock. RHF is machined from 6000 series extruded aluminum, its barrel nut is machined from 7075... ... more
Forward Controls Design Ar-15 Handguards M-Lok 5.56mm - Ar-15 Handguard 15in. M-Lok Black RHF (Railed Handguard, Forward Controls) is based on the superb CMT UHPR Mod2, with full length 1913 rails at 12 o'clock, and MLOK at 3, 6, and 9 o'clock. RHF is machined from 6000 series extruded aluminum, its barrel nut is machined from 7075... | go to store |
 | Forward Controls Design A5 Castle Nut - A5 Castle Nut, Olive Drab Green CN5F (Castle Nut, A5, Forward Controls) is an extended version of CNF Forward Controls Design (FCD) have been making since 2018. CN5F is designed specifically for the superb Vltor A5 system, CN5F is 0.1" longer, and is as long as FCD can make a castle... ... more
Forward Controls Design A5 Castle Nut - A5 Castle Nut, Olive Drab Green CN5F (Castle Nut, A5, Forward Controls) is an extended version of CNF Forward Controls Design (FCD) have been making since 2018. CN5F is designed specifically for the superb Vltor A5 system, CN5F is 0.1" longer, and is as long as FCD can make a castle... | go to store |
 | Guntec USA AR-15 Micro AR Pistol System Flat Dark Earth GT-MAPS-FDE Guntec USA AR-15 Micro AR Pistol System Flat Dark Earth GT-MAPS-FDE. 4in Buffer that weighs 1.8 oz One Point Sling End Plate with QD Swivel Extreme Duty Castle Nut Specifications for Guntec USA AR-15 Micro AR Pistol System: Manufacturer: Guntec USA... ... more | FREE shipping go to store |
 | Next Level Armament NLA AR -15 M-Lok Handguard 5.56 mm 15 in 5 slots Anodized Black NLX551 Next Level Armament NLA AR -15 M-Lok Handguard 5.56 mm 15 in 5 slots Anodized Black NLX551. Hard coat anodized and includes solid billet steel barrel nut shims and 5 slot MLOK rail attachment. Designed to match our AR15 receivers we machine our AR15... ... more | FREE shipping go to store |
 | Aero Precision Ar-15 Buffer Tube Lock Nut - Receiver Extension Lock Nut For Ar-15 Black Mil-spec. receiver extension lock nut (castle nut) for use on AR15 carbines with an adjustable stock. Perfect for your new build or as a direct replacement for worn out parts. Made in the USA. Mfg: Aero Precision ... more
Aero Precision Ar-15 Buffer Tube Lock Nut - Receiver Extension Lock Nut For Ar-15 Black Mil-spec. receiver extension lock nut (castle nut) for use on AR15 carbines with an adjustable stock. Perfect for your new build or as a direct replacement for worn out parts. Made in the USA. Mfg: Aero Precision | go to store |
 | Forward Controls Design Ar-15 Handguards M-Lok 5.56mm - Ar-15 Handguard 13.7in. M-Lok Black RHF (Railed Handguard, Forward Controls) is based on the superb CMT UHPR Mod2, with full length 1913 rails at 12 o'clock, and MLOK at 3, 6, and 9 o'clock. RHF is machined from 6000 series extruded aluminum, its barrel nut is machined from 7075... ... more
Forward Controls Design Ar-15 Handguards M-Lok 5.56mm - Ar-15 Handguard 13.7in. M-Lok Black RHF (Railed Handguard, Forward Controls) is based on the superb CMT UHPR Mod2, with full length 1913 rails at 12 o'clock, and MLOK at 3, 6, and 9 o'clock. RHF is machined from 6000 series extruded aluminum, its barrel nut is machined from 7075... | go to store |
 | Forward Controls Design Ar-15 Handguards M-Lok 5.56mm - Ar-15 Handguard 6.7in. M-Lok Black RHF (Railed Handguard, Forward Controls) is based on the superb CMT UHPR Mod2, with full length 1913 rails at 12 o'clock, and MLOK at 3, 6, and 9 o'clock. RHF is machined from 6000 series extruded aluminum, its barrel nut is machined from 7075... ... more
Forward Controls Design Ar-15 Handguards M-Lok 5.56mm - Ar-15 Handguard 6.7in. M-Lok Black RHF (Railed Handguard, Forward Controls) is based on the superb CMT UHPR Mod2, with full length 1913 rails at 12 o'clock, and MLOK at 3, 6, and 9 o'clock. RHF is machined from 6000 series extruded aluminum, its barrel nut is machined from 7075... | go to store |
 | Forward Controls Design Ar-15 Handguards M-Lok 5.56mm - Ar-15 Handguard 11.5in. M-Lok Black RHF (Railed Handguard, Forward Controls) is based on the superb CMT UHPR Mod2, with full length 1913 rails at 12 o'clock, and MLOK at 3, 6, and 9 o'clock. RHF is machined from 6000 series extruded aluminum, its barrel nut is machined from 7075... ... more
Forward Controls Design Ar-15 Handguards M-Lok 5.56mm - Ar-15 Handguard 11.5in. M-Lok Black RHF (Railed Handguard, Forward Controls) is based on the superb CMT UHPR Mod2, with full length 1913 rails at 12 o'clock, and MLOK at 3, 6, and 9 o'clock. RHF is machined from 6000 series extruded aluminum, its barrel nut is machined from 7075... | go to store |
 | KAK AR-15 6-Position Mil-Spec Carbine Buffer Tube Kit Tube/Buffer/Buffer Spring/Endplate/Castle Nut AR15-KT-003. Included Is The Carbine Buffer Tube Standard Carbine Spring Standard Carbine Buffer Castle Nut And Standard End Plate.. This Tube Is... ... more | go to store |
 | Forward Controls Design Ar-15 Handguards M-Lok 5.56mm - Ar-15 Handguard 12.7 In. M-Lok Black RHF (Railed Handguard, Forward Controls) is based on the superb CMT UHPR Mod2, with full length 1913 rails at 12 o'clock, and MLOK at 3, 6, and 9 o'clock. RHF is machined from 6000 series extruded aluminum, its barrel nut is machined from 7075... ... more
Forward Controls Design Ar-15 Handguards M-Lok 5.56mm - Ar-15 Handguard 12.7 In. M-Lok Black RHF (Railed Handguard, Forward Controls) is based on the superb CMT UHPR Mod2, with full length 1913 rails at 12 o'clock, and MLOK at 3, 6, and 9 o'clock. RHF is machined from 6000 series extruded aluminum, its barrel nut is machined from 7075... | go to store |
 | Sons Of Liberty Gun Works Ar-15 Castle Nut Sons of Liberty Gun Works factory OEM Castle Nut for Mil-Spec AR-15s. Mfg: Sons Of Liberty Gun Works ... more
Sons Of Liberty Gun Works Ar-15 Castle Nut Sons of Liberty Gun Works factory OEM Castle Nut for Mil-Spec AR-15s. Mfg: Sons Of Liberty Gun Works | go to store |
 | Guntec USA AR-15 Mil-Spec Buffer Tube Set 6-position CAR Buffer/Spring/End Plate/Castle Nut Black MILTUBESET. These AR15 Lower Parts by Guntec USA are constructed from T6 aluminum for a durable yet lightweight platform. This Guntec USA AR-15 6-Position... ... more | FREE shipping go to store |
 | Tiger Rock AR-15 Muzzle Brake .223/5.56 1/2x28 TPI 3.5in with Mitigator Designs Includes Jam Nut MBD22. 223/5.56 1/2x28 tpi barrel. The TRL - Mitigator Muzzle Brake features four aggressively angled surfaces to redirect muzzle blast and sound forward... ... more | go to store |
 | Guntec USA AR-15 TRX Raptor Stock Black TRX Guntec USA AR-15 TRX Raptor Stock Black TRX. Complete With Mil-Spec Buffer Tube End Plate Castle Nut CAR Buffer & Chrome Recoil Spring Specifications for Guntec USA AR-15 TRX Raptor Stock: Manufacturer: Guntec USA Color: Raptor Gun Model: AR-15 Gun... ... more | FREE shipping go to store |
 | Forward Controls Design Ar-15 End Plate W/ 3-Qd Sling Swivel Sockets Steel - End Plate W/ 3-Qd Sling As is FCD's practice, ESF's shape is dictated by its functions. In order to accommodate the rear facing socket, and fill one of the design requirements that ESF must be able to use stakable castle nuts and allow the carbine stock to fully collapse, ESF... ... more
Forward Controls Design Ar-15 End Plate W/ 3-Qd Sling Swivel Sockets Steel - End Plate W/ 3-Qd Sling As is FCD's practice, ESF's shape is dictated by its functions. In order to accommodate the rear facing socket, and fill one of the design requirements that ESF must be able to use stakable castle nuts and allow the carbine stock to fully collapse, ESF... | go to store |
 | Forward Controls Design Ar-15 End Plate W/ 3-Qd Sling Swivel Sockets Steel - Sling Adapter End Plate As is FCD's practice, ESF's shape is dictated by its functions. In order to accommodate the rear facing socket, and fill one of the design requirements that ESF must be able to use stakable castle nuts and allow the carbine stock to fully collapse, ESF... ... more
Forward Controls Design Ar-15 End Plate W/ 3-Qd Sling Swivel Sockets Steel - Sling Adapter End Plate As is FCD's practice, ESF's shape is dictated by its functions. In order to accommodate the rear facing socket, and fill one of the design requirements that ESF must be able to use stakable castle nuts and allow the carbine stock to fully collapse, ESF... | go to store |
 | Hogue AR-15/M-16 OverMolded Fixed Buttstock - Fits A2 Buffer Tube OD Green 15241 Hogue AR-15/M-16 OverMolded Fixed Buttstock - Fits A2 Buffer Tube OD Green 15241. With a slim profile rubber cheek rest and multiple sling mounting positions this stock does not require a castle nut installation. Reinforced Polymer Construction.... ... more | FREE shipping go to store |
 | AT3 Tactical SPEAR M-LOK AR-15 Free Float Handguard 12in Length Burnt Bronze AT3-MLOK-12-BB AT3 Tactical SPEAR M-LOK AR-15 Free Float Handguard 12in Length Burnt Bronze AT3-MLOK-12-BB. M-LOK attachment slots and included rail section provide unlimited options for accessorizing your build. And with an available Billet Upper to perfectly match... ... more | FREE shipping go to store |
 | LWRCI Ultra Compact Stock Kit For Ar-15 Black 200-0092A01 LWRCI Ultra Compact Stock Kit For Ar-15 Black 200-0092A01. The stock kit includes the stock receiver extension index plate buffer recoil spring and castle nut. The systems components were designed to work together and should be installed together for... ... more | FREE shipping go to store |
 | LBE Unlimited AR15 Complete Stock Kit w/ Contains Mil-Spec Stock Buffer Tube Castle Nut and Lock Plate Black LBMILSTKKT. LBE Unlimited Complete Stock Kit For AR-15 Contains Mil-Spec Stock Buffer Tube Castle Nut Lock Plate MILSTKKT Specifications for... ... more | FREE shipping go to store |
 | Brownells Ar-15/M16/M4 Replacement Pins - Ar-15/M16/M4 Round Replacement Pins 3 Pack Our handy, compact tool is uniquely designed to combine several tools into one. It has a spanner wrench that fits the receiver extension castle nut on M4-style collapsible buttstocks, with interchangeable pins to fit nuts with both old (round) and new... ... more
Brownells Ar-15/M16/M4 Replacement Pins - Ar-15/M16/M4 Round Replacement Pins 3 Pack Our handy, compact tool is uniquely designed to combine several tools into one. It has a spanner wrench that fits the receiver extension castle nut on M4-style collapsible buttstocks, with interchangeable pins to fit nuts with both old (round) and new... | go to store |
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