About Phase 5 Builders Bin

Due to an Overwhelming number of requests from small companies and serious AR15 builders, Phase 5 Weapon Systems Inc.® is Proud to introduce our newest Web Division!

The Phase 5 Builders’ Bin™

In this popular Phase 5 Web Division you will have access to our personal inventory and stash of OEM parts, OEM repair parts and hard to find small spare components that you can never have enough of. This Division will constantly rotate new relevant components in and out of the Builders’ Bin based on ability to offer the parts when we have a sufficient amount of the (part/parts) machined and in the parts bin. We hope that you will find these parts and their availability extremely helpful!
 
MFT Engage™ Pistol Grip
MFT Engage™ Pistol Grip

$24.99

   
CMC Drop-In trigger Group, 3.5lb Curved - Single Stage
CMC Drop-In trigger Group, 3.5lb Curved - ...

$174.00

   
CMC Drop-In trigger Group, 3.5lb Flat - Single Stage
CMC Drop-In trigger Group, 3.5lb Flat - Si...

$174.00

 
 
Low Profile Gas Block (Pinch Screw)
Low Profile Gas Block (Pinch Screw)

$33.50

   
Pistol Length Gas Tube (with roll pin) AR-15
Pistol Length Gas Tube (with roll pin) AR-15

$13.99

   
MilSpec AR-15 Trigger Guard
MilSpec AR-15 Trigger Guard

$4.00

 
 
Extractor Spring O-Ring 3 Pack For AR-15/M16
Extractor Spring O-Ring 3 Pack For AR-15/M16

$1.50

   
Safety Selector AR-15
Safety Selector AR-15

$11.00

   
Forward Assist Plunger Assembly AR-15
Forward Assist Plunger Assembly AR-15

$10.00

 
 
AR-15 Crush Washer
AR-15 Crush Washer

$1.75

   
Standard AR-15 Bolt Catch
Standard AR-15 Bolt Catch

$5.00

   
Charging Handle Latch Spring AR-15, LR-308
Charging Handle Latch Spring AR-15, LR-308

$1.50

 
 
Bolt Catch Roll Pin AR-15
Bolt Catch Roll Pin AR-15

$1.00

   
Standard A2 Pistol Grip
Standard A2 Pistol Grip

$4.00

   
Standard Carbine Buffer
Standard Carbine Buffer

$18.00

 
 
AR-15 Hammer Spring
AR-15 Hammer Spring

$1.50

   
AR-15 Receiver Extension Castle Nut
AR-15 Receiver Extension Castle Nut

$5.00

   
Bolt Carrier Gas Key - Chromed Lined with (2) Socket Head Screws
Bolt Carrier Gas Key - Chromed Lined with ...

$20.00

 
 
Standard End Plate for AR-15/M4
Standard End Plate AR-15/M4

$4.00

   
Pistol Buffer Spring / Carbine - Enhanced
Pistol Buffer Spring / Carbine - Enhanced

$8.00

   
A.R.M.S.®  #71-F and #71-R Flip Up Sight Set
A.R.M.S.® #71-F and #71-R Flip Up Sight Set

$97.00   $87.00

 
 
AR-15 Lower Receiver Parts Kit
AR-15 Lower Receiver Parts Kit

$75.00

   
EXTRA POWER EXTRACTOR SPRING AR15/M16
EXTRA POWER EXTRACTOR SPRING AR15/M16

$4.00

   
EXTRA POWER EXTRACTOR SPRING AR15/M16 (PACK OF 3)
EXTRA POWER EXTRACTOR SPRING AR15/M16 (PAC...

$10.00

 
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