3CR Tactical | Firearm parts, accessories and build kits.

Featured Products

Sale!

Build Kits

Build Your Own AR Carbine Kit

$420.57

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Polymer80 Build Kits

Build-Your-Own Glock 19 Gen 3 Complete Slide

$214.33

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Build Kits

AR-15 Basic Carbine Full Kit

$393.26

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Polymer80 Build Kits

Build-Your-Own Glock 43/43X Complete Slide

$344.84

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Lower Receivers and Parts

80% AR-15 Un-Anodized Lower Receiver

$54.00

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Glock 17 complete slide with black nitride barrel

Polymer80 Build Kits

Build-Your-Own Glock 17 Gen 3 Complete Slide

$234.23

Sale!

Polymer80 Build Kits

Build-Your-Own Glock 23 Gen 3 Complete Slide

$215.23

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Build Kits

Complete AR-15 Pistol Kit – 11.5″ 5.56 Barrel – M-lok Rail – SBA Brace

$599.00

Sale!

Glock Parts Kits

Advantage Arms Conversion Kit For LE17-22 Gen 4 with Range bag

$239.00

Gas Blocks and Gas Tubes

6.75″ Pistol Length Stainless Steel Gas Tube for .223/5.56

$11.99

Scopes & Sights

Barska 1x Red Dot 30mm

$69.95

Parts Kits

Anderson Mil-Spec Fire Control Group

$32.99

Gas Blocks and Gas Tubes

.750 Low Profile Aluminum Gas Block with Roll Pins

$13.99

Parts Kits

Seekins Builders Lower Parts Builders Kit

$94.00

Gunsmithing Tools

Real Avid AR15 Master Armorer’s Tool Kit

$279.99

Grips

Tactical 5-Position Folding Vertical Foregrip For Picatinny Rail Mount

$12.99

Sig Sauer SOR01300 Romeo Zero Reflex Sight

Pistol Optics

Sig Sauer Romeo Zero 1X Red Dot 3 MOA Reflex Sight

$189.00

Gunsmithing Tools

Lightweight Rifle Bench Rest

$15.00

Barrels and Parts

AR-15 Government 16″ 5.56 NATO 1:7 Mid Length Gas Barrel

$134.00

Glock Barrels

9mm Matte DLC Glock 43/43X Crown Cut Barrel

$72.99

Parts Kits

Buffer Detent and Spring

$5.99

Quad Rail

Spike’s 10″ Black BAR2 Free-Float Quad Rail

$229.95

Slides

FDE PVD RMR Cut Window Slide for Glock 19

$144.99

Buffer Tubes and Kits

Trinity Force Beta Stock Rifle Length Kit

$59.95

Gunsmithing Tools

Steel 7.62×39/54mm Rifle AK SKS Front Sight Windage Elevation Adjustment Tool

$9.99

Uppers and Parts

Yankee Hill Machine Co Stripped Upper Receiver – Black Finish

$92.00

Gas Blocks and Gas Tubes

15″ Rifle Length Stainless Steel Gas Tube for .223/5.56

$15.99

Knives

KaBar Becker BK2 Companion 5.25″ Fixed Blade

$87.95

Barrels and Parts

10 Pack Black Oxide Finish Steel Crush Washers

$9.99 – $10.99

Uppers and Parts

.308 DPMS Low Profile Anodized Upper Receiver

$159.00

Scopes & Sights

Sniper LT4X32M 4X32mm Compact Scope with Rings

$29.17

Scopes & Sights

Sniper 6-24X50 Magnification Hunting Rifle Scope with R/G/B/ Illuminated Mil Dot Reticle

$94.99

Latest Articles

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Growing list of resources and how-to videos to resolve most common Polymer80 build issues. [...]

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Installing Glock 17/19 Slide Parts Kit

If you’re shopping around for a slide for your Glock or Polymer80 build, you’ve probably [...]

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A Better-than-basic Glock 17 Clone Build List for Under $500

The Glock 17 has been around for almost 40 years now and is one of [...]

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Identifying Your .308 Upper Receiver

A lot of terms are thrown around when it comes to the .308 world that [...]

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Sub $400 Budget AR15 Build List

Below we have a list of parts we carry for a basic, budget AR15 carbine [...]

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Dec

New arrivals

POLYMER80 Build Kits

Build Your Own Slide Kits