AR15/M16 Lower Parts

2Pc Combo, Pistol Buffer Tube w/ 1" Oval QD Swivel

$41.95

Combo Includes: 1.190" OD Pistol Buffer Tube, machined from 6061 billet, hard-coat anodized to Mil..

Pistol Buffer Tube Receiver Extension w/QD socket 1.190” Diameter

$28.95

Pistol Buffer Tube1.190” outside diameter, Overall Length ~ 7 3/8"Machined from 6061 Billet Aluminum..

5pc Pistol Buffer Tube Kit w/QD Socket, 1.19" OD, Black

$74.95

Includes: (1) Receiver Extension Buffer Tube, 1.19" Pistol W/Quick Detcah Socket. Billet Alumin..

5 Pack CARBINE LENGTH Enhanced Recoil Buffer Spring, AR-15 M4

$64.75

Five (5) CountFor AR-15 / M4 Carbine:Made in the USA and 100% quality inspected by hand for proper f..

5 Pack RIFLE LENGTH Enhanced Recoil Buffer Spring, AR-15 M4

$64.75

FIVE (5) Count• Constructed from certified USA made chrome silicon spring wire• Heat treated, stress..

AR15/M16 Receiver End Plate, Tri QD

$39.95

Precision machined from 6061 T6 Aluminum alloy with Mil-A-8625 Type III Class 2 Hardcoat Anodized fi..

Swivel Mount, QD Socket GI Stock

$24.95

Replaces government and OEM sling loop on rifle and carbine buttstocks utilizing the OEM fastener.Fe..

9pc OD Green Buttstock Pistol Grip Kit M4/AR15

$103.95

Kit includes:M4 telescoping buttstock w/Sling Loop in OD GreenA2 Pistol Grip in OD GreenPistol Grip ..

AR15/M4 Quick Detach Socket Receiver End Plate, Thin Profile, Aluminum

$19.95

Our thinnest and lightest end plate with Quick-Detach Socket Features same profile as the standard G..

AR15/M4 USGI 5pc Sliding Stock Lever Replacement Kit

$9.95

USGI M4/AR15 Adjustable Stock Lever Replacement Kit, Mil-SpecKit Includes:- Release Lever, Black Pol..

Buttstock, USGI M4 Carbine Sliding w/ Sling Loop, FDE

$39.95

M4 USGI Sliding Buttstock Assembly w/fixed Sling LoopAR15/M4 Mil-Spec M4 Carbine Sliding Buttstock ..

Buttstock, USGI M4 Carbine Sliding w/ Sling Loop, Mil-Spec, Black

$39.95

M4 USGI Sliding Buttstock Assembly w/fixed Sling LoopAR15/M4Mil-Spec M4 Carbine Sliding Buttstock wi..

Buttstock, USGI M4 Carbine Sliding w/ Sling Loop, OD Green

$39.95

M4 USGI Sliding Buttstock Assembly w/fixed Sling LoopAR15/M4 Mil-Spec M4 Carbine Sliding Buttstock ..

CARBINE LENGTH Enhanced Recoil Buffer Spring, AR-15 M4

$12.95

For AR-15 / M4 Carbine:Made in the USA and 100% quality inspected by hand for proper function. Cons..

Kit, Lower Receiver Parts, AR-15 Semi-Auto, w/o Fire Control - 18pc

$48.95

Lower Receiver Parts Kit W/O Hammer/Trigger/Disconnector18pc Parts Kit Includes:SelectorSelector Det..

RIFLE LENGTH Enhanced Recoil Buffer Spring, AR-15 M4

$12.95

• Constructed from certified USA made chrome silicon spring wire• Heat treated, stress relieved• Pro..

Spring, Recoil Buffer Carbine, AR15/M16, Stainless

$4.95

Standard Carbine Recoil Spring for AR15/M4 Platforms with adjustable stocksStainless SteelMade in US..

5pc Kit, Complete Receiver Extension, Mil-Spec AR-15 Carbine

$49.95

AR15/M4 Mil-Spec Dimensions, made in the USA.Kit includes:• Mil-spec receiver extension (6 position)..

AR-15/M16 2pc Standard Carbine Buffer & Enhanced Spring Combo

$25.95

AR-15/M16 2pc Standard Carbine Buffer & Enhanced Spring ComboCarbine Standard Buffer, 3oz ..

AR-15/M16 2pc Standard Carbine Buffer & Stainless Spring Combo

$16.95

AR-15/M16 2pc Standard Carbine Buffer & Spring ComboCarbine Standard Buffer, 3oz PinnedCar..

H2 Buffer Upgrade Kit, 4pc Carbine Enhanced Recoil Spring, Buffer, Detent/Spring

$50.95

H2 Buffer Upgrade Kit includes:H2 Buffer, Mil-Spec 4.7 ozEnhanced Silicon Carbine SpringBuffer Deten..

Kit, Enhanced, Complete Receiver Extension, Spring, End plate, Castle Nut

$69.95

Kit Includes: Mil-Spec receiver extension (6 position) 7075 aluminum, Hardcoat AnodizedBlack Oxide C..

Kit, Trigger 3pc Assembly Kit AR15

$22.95

Kit Includes:Mil-Spec TriggerMil-Spec Trigger SpringMil-Spec Trigger PinAll Made in the USA..

8 Pcs Kit, Complete Buttstock, M4 Telescoping, Mil-Spec

$96.95

Mil-Spec, made in the USA.Kit includes:• M4 telescoping buttstock w/Sling Loop• Mil-spec receiver ex..

Kit, Lower Receiver Parts, AR-15 Semi-Auto, w/o Pistol Grip and Trigger Guard

$63.95

100% Made in USA. 26pc Kit Includes:Buffer RetainerBuffer Retainer SpringDisconnectorDisconnector Sp..

Kit, Lower Receiver Parts, AR-15/M4 Semi-Auto

$69.95

100% Made in USA.Kit Includes:Pistol GripPistol Grip ScrewPistol Grip Lock WasherBuffer RetainerBuff..

Kit, Nickel Teflon AR15 5.56/.223

$9.95

Nickel Teflon KitAR15 5.56/.223 Kit Includes:1- Cam Pin1- Selector Detent1- Bolt Catch Plunger2- Tak..

AR15 Rifle Length Buffer Kit, Mil-Spec Stainless or Enhanced Spring Upgrade

$45.95

Kit Includes: Rifle-Length Receiver Extension/Buffer Tube Mil-Spec 6061 T6 Aluminum with a hard ..

Selector, Ambi, Safe-Fire, 90° Throw Lever

$34.95

Our 90° Ambi selector allows safe/fire manipulation on both sides of the receiver.Black Oxide fini..

Kit, Rifle Enhanced Recoil Spring Upgrade w/Buffer

$28.95

Kit Includes:(1) Rifle Length Chrome Silicon Enhanced Recoil Spring(1) Rifle Buffer (5.2oz)Made in t..

AR15/M4 Spring Kit Lower Receiver 9pc

$9.95

Mil-spec, made in USAIncludesHammer Spring x 1Trigger Spring x 1Magazine Catch Spring x 1Selector De..

Buffer, Recoil, Carbine

$13.95

weight = 3 oz.PinnedMade in USA..

Buttstock, M4 Carbine w/QD Mount, Mil-Spec, Black

$39.95

BACK IN STOCKMil-Spec M4 Carbine buttstock with enhanced QD sockets. Also available in SHTF Brown, F..

Kit, 3pc Magazine Catch Assembly AR15/M16/M4

$12.95

Made in USA.IncludesMagazine catch x 1Magazine catch button x 1Magazine catch spring x 1..

Kit, 3pc Selector Assembly

$14.95

Made in USA.IncludesSelector x 1 (Black Oxide finish)Selector Detent x 1Selector Detent Spring x 1..

Kit, Hammer & Trigger Group AR15

$49.95

AR15 Semi Auto Hammer Trigger KitKit includes:• Hammer• Hammer Spring• Trigger• Trigger Spring• Disc..

AR15/M16 Kit, 36pc Small Parts Pack

$34.95

Made in USA1 Delta Slip Ring Spring1 Delta Snap Ring (C-clip)1 Bolt Catch Plunger1 Bolt Catch Pin1 F..

Buffer, Recoil, Carbine, H2

$37.95

H2 Carbine Recoil Buffer Aluminum Alloy Body with Tungsten Weights, PinnedMarked H2Mil-Spec 4.7 ozMa..

Buffer, Recoil, Carbine, H3

$39.95

H3 Carbine Recoil Buffer Aluminum Alloy Body with Tungsten Weights, PinnedMarked H3Mil-Spec 5.4 ozMa..

Sale

Kit, Takedown & Pivot Pin, Springs Pins

$4.50$8.95

Made in USA.Available in Black Oxide or Mag PhosphateIncludes:1 x Takedown Pin1 x Pivot Pin2 x Sprin..

Buffer, Recoil, Carbine, H

$23.95

H Carbine Recoil Buffer Aluminum Alloy Body with Tungsten Weights, PinnedMarked HMil-Spec 3.8ozMade ..

Sale

Kit, Buffer Retainer Detent & Spring

$1.00$2.00

Buffer detent and spring kitBoth Made in USA..

Receiver Extension Buffer Tube (Carbine, 6 POS Mil-Spec)

$28.95

Carbine length, 6 position adjustmentMil-Spec 7075-T6 Aluminum Impact ExtrusionHard Coat Anodiz..

Spring, Recoil Buffer Rifle, AR15/M16, Stainless

$4.95

Fits M16, M16A1, M16A2, M16A3, M16A4. For use with a full size M16 Rifle buffer and full size rifl..

End Plate, M4 Receiver, USGI

$3.95

USGI End PlateSteelMag PhosphateMade in USA...

Kit, Bolt Catch Assembly AR15/M4/M16

$12.95

Made in USA.IncludesBolt Catch x 1Bolt Catch Roll Pin x 1Bolt Catch Plunger, Black Oxide x 1Bolt Cat..

Kit, Hammer Assembly AR15/M4 Semi

$22.95

Semi-Auto, AR15 Hammer Kit Includes:Mil-Spec Dimensions, 8620 Alloy Steel, Black Oxide HammerMil-Spe..

4pc Kit, ECS Enhanced Combat System Buttstock, Spring, Tube, Nut- Commercial Spec

$125.95

Kit Includes:1 x ECS Buttstock, Commercial Spec1 x 6 Position Buffer Tube Commercial Spec1 x Black O..

AR15/M16 Buffer, Recoil, Rifle

$18.95

Rifle-length buffer for AR-15/M16 riflesmade to military specifications Weight = 5.2 ozMade in the U..

AR15/M4 Castle Nut & End Plate Comb Mil-Spec, Mag Phos

$9.95

Castle Nut & End Plate ComboMil-Spec AR15/M4 PlatformsCastle Nut - Steel, Slots angled to pin, M..

AR15/M4 Castle Nut & End Plate Combo Enhanced QD Socket

$25.95

AR15/M4 Castle Nut & End Plate Combo Enhanced QD SocketCastle nut, Steel, Black OxideEnd Plate, ..

Extension, Receiver, Rifle Length, Buffer Tube

$29.95

Rifle Length Buffer TubeMil-Spec 6061 T6 Aluminum with a Black hard coat anodize.Made in USA...

Stock, Enhanced Combat System, Commercial Spec, Coyote Tan

$89.95

* Drop-in Installation on M4 receiver extensions (Buffer Tube)* Full length storage compartments hol..

Stock, Enhanced Combat System, Commercial Spec, Foliage Green

$89.95

* Drop-in Installation on M4 receiver extensions (Buffer Tube)* Full length storage compartments hol..

5 Pack CARBINE LENGTH Recoil Buffer Spring, AR15/M16, Music Wire

$24.75

5 Pack CARBINE LENGTH Recoil Buffer Spring, AR15/M16, Music WireFor AR-15 / M4 Carbine length gas sy..

5 Pack CARBINE LENGTH Recoil Buffer Spring, AR15/M16, Stainless

$24.95

5 Pack CARBINE LENGTH Recoil Buffer Spring, AR15/M16, Stainless SteelFits AR15, M4 adjustable stocks..

5 Pack RIFLE LENGTH Recoil Buffer Spring, AR15/M16, Stainless

$24.75

5 Pack RIFLE LENGTH Recoil Buffer Spring, AR15/M16, Stainless SteelFits M16, M16A1, M16A2, M16A3, M1..

AR-15 Trigger

$16.95

AR15 Trigger, Mil Spec dimensionsMade in USA..

AR15/M16 Civil Defense Logo Trigger Guard w/Plug

$19.95

Our Enhanced Trigger Guard with plug features a shape that fills the "gap" left by traditional AR-..

AR15/M16 Enhanced Trigger Guard, Black

$19.95

Our Enhanced Trigger Guard without plug allows the trigger guard to pivot downward. Does not fill th..

AR15/M16 Locking Washer, Pistol Grip

$1.00

Don't let your friends say you've got a loose screw - maintain your grip with a fresh locking washer..

AR15/M16 Plunger, Bolt Catch

$1.00

Available in NicoTef or Black Oxide finish.Made in USA..

AR15/M16 Spring Kit - Hammer/Trigger Springs & Pins

$6.95

Mil-spec, made in USAIncludesTrigger Spring x 1Hammer Spring x 1Disconnector Spring x 1Trigger/Hamme..

AR15/M16 Spring, Trigger Guard Detent

$1.00

Mil-spec, made in USA..

AR15/M16 Thin Enhanced Trigger Guard, Destroyer Gray

$19.95

Our Thinnest Enhanced Trigger Guard without plug allows the trigger guard to pivot downward. Does no..

AR15/M16 Trigger Guard

$6.95

AR14 M4 M16 Standard Trigger Guard with pinMil-spec dimensions 7075 Aluminum, Hard coat anodize, Typ..

AR15/M4 Kit, 90˚ Ambi Selector Assembly

$39.95

Our 90° ambi selector allows safe/fire manipulation on both sides of the receiver.Precision machin..

AR15/M4 Nut, Castle Receiver Extension Tube, Black Oxide

$5.95

Threaded to fit standard AR15/M4 PlatformsSlotted to pinBlack Oxide FinishAs always - Made in USA...

AR15/M4 Nut, Castle Receiver Extension Tube, Mag Phosphate

$5.95

Mil-Spec AR15/M4 PlatformsSlots angled to pinMag Phos FinishAs always - Made in USA...

Bolt Catch, AR15/M4/M16

$8.95

AR15 Mil-spec Bolt CatchMade in USAAlso - Check out our bolt catch kit here..

Buttstock, M4 Carbine w/QD Mount, Mil-Spec, Foliage Green

$39.95

AR15/M4Mil-Spec M4 Carbine Sliding Buttstock with added Quick Detach SocketMolded Polymer Constructi..

Buttstock, M4 Carbine w/QD Mount, Mil-Spec, Olive Drab

$39.95

Mil-Spec M4 Carbine buttstock with enhanced QD sockets. Made in USA.*All Damage Industries QD ..

Buttstock, M4 Carbine w/QD Mount, Mil-Spec, SHTF Brown

$39.95

AR15/M4Mil-Spec M4 Carbine Sliding Buttstock with added Quick Detach SocketMolded Polymer Constructi..

Carbine AR15/M16 Spring, Recoil Buffer Action, Music Wire

$4.95

For AR-15 / M4 Carbine.Higher performance over stainless mil-spec recoil spring - reduces perceived ..

Combo, QD End Plate w/ QD Swivel - Choose Swivel

$32.95

Kit Includes: Receiver End PlateQuick detach, Push Button Swivel - Three to Choose from 1", 1.25" or..

Detent, Buffer Retainer, AR15/M16

$1.00

Made in USA...

Detent, Selector, AR15/M16

$1.00

NicoTef provides exceptional lubricity and corrosion resistance while maintaining a low coeffici..

Detent, Takedown/Pivot Pin, AR15/M16

$1.00

NicoTef provides exceptional lubricity and corrosion resistance while maintaining a low coeffici..

Disconnector, AR-15

$6.25

Disconnector, AR-15Made in USA...

Enhanced Combat Stock & Grip Kit, Coyote or Foliage, Commercial

$94.95

* Easy Drop-in Installation, fits Commercial Buffer Tubes* Full length storage compartments hold bat..

Enhanced Combat System Furniture Kit, Commercial Spec, Coyote Tan

$116.95

Available in Coyote, Foliage Green, and FDE 30118.ECS Stock* Drop-in Installation on M4 receiver ext..

Enhanced Combat System Furniture Kit, Commercial Spec, Foliage Green

$116.95

Available in Foliage Green, Coyote, and FDE 30118.ECS Stock* Drop-in Installation on M4 receive..

Fastener, Ambi-Selector Lever

$1.00

FHSCS M3-0.5x6 fastener. Intended for use in with our 90° Standard Throw and 45° Throw ambi selector..

Hammer, AR-15/M4 Semi

$17.95

AR-15/M4 Semi Auto Hammer Mil-Spec dimensions Made in USA...

Kit, Pistol Grip Screw w/Lock Washer

$1.95

Kit Includes: (1) Pistol Grip Screw, Hex or Slotted(1) Lock WasherMade in USA..

MAD End Plate, Mk II (Multi-Adaptable Design)

$18.95

Back in Stock!Completely reversible AR-15 Carbine End Plate with dual-sided, ultra-thin profile - ..

Magazine Catch, AR15/M4/M16

$7.95

AR15 Platform Magazine CatchMade in USA...

Magazine Release Button, AR15/M16/M4

$2.00

Billet 7075-T6 AluminumType 3 Hardcoat AnodizedMade in USA..

Magazine, Colt SS 9MM, 32 Rd

$89.95

Rugged, all-steel, high-capacity magazines for 9mm AR-15 conversions that use a Colt-style magazine...

Magazine, PRI 6.8 Spc, AR, 28 Round

$29.95

Magazine, PRI 6.8 Spc, AR, 25 RoundPrecision Reflex 6.8mm SPC 28 round capacity magazines with pushb..

Pin, Bolt Catch

$1.00

Made in USA...

Pin, Hammer/Trigger, AR15/M16

$1.00

Mil-Spec, Made in USA. ..

Pin, Receiver Pivot, AR15/M4/M16 Mag Phos or Black Oxide

$3.50

AR-15, M4, M16 CompatibleMachined to Mil-Spec DimensionsAvailable in Black Oxide or Manganese Phosph..

Pin, Receiver Takedown, AR15/M4, M16 Mag Phos or Black Oxide

$3.50

AR-15, M4, M16 CompatibleMachined to Mil-Spec DimensionsAvailable in Black Oxide or Manganese Phosph..

Pin, Trigger Guard Assembly

$1.00

Steel Slotted Spring Pin, Mag Phosphate Made in USA...

Pin, Trigger Guard Detent

$1.00

Made in USA...

Pistol Grip, ECS, Black

$4.95

ECS Grips* Classic A2 style* Also available in Foliage Green* Made in USA from milspec materials*Scr..

Pistol Grip, ECS, Coyote Tan

$4.95

Enhanced Combat Systems (ECS) Grip* Classic A2 style* Also available in multiple colors* Made in USA..

Pistol Grip, ECS, Foliage Green

$4.95

ECS Grips* Classic A2 style* Also available in Black * Made in USA from milspec materials*Screw and ..

Pistol Grip, ECS, OD Green

$4.95

ECS Grips* Classic A2 style* Also available in Black and Foliage Green* Made in USA from milspec mat..

Lower Parts

Explore Sub-Categories