The HIStory

Build Log:

Dissipator - Replica

Model 605

A Dissipator is an AR15 carbine with rifle length sight radius.

The Model 605 was the first attempt by Colt to produce a "Carbine" style AR15/M16. The two models offered were the Model 605A which had a 3-Way Fire Control Group (Safe, Semi, Auto), and the 605B which had a 4-Way Fire Control Group (Safe, Semi, Burst, Auto).The barrel was cutoff just past the Front Sight Base, the Bayonet Lug was removed, and the flash hider was reattached giving the ‘Carbine’ an overall length of approximately 34 inches. This model was produced in very limited numbers and never saw any wide scale use in the field by Military Forces due to its unreliable operation.

Caliber - 5.56x45 NATO / .223 Remington

Overall Length - 35 Inches / 88.9cm

Weight - 9.25 LBS / 4.2 Kg

Notes: Loaded - 30 Round Magazine & Sling.

Parts Specifications:

Barrel

16" Mid-Length Barrel Assembly

Length - 16 Inches

Profile - Government

1:7 Rifling Twist

Rifle Barrel Extension

Manufacturer - Palmetto State Armory

Notes: 1/2x28 Thread

Slip Ring

‍Manufacturer - Harrington & Richardson

Muzzle Device‍

3 Prong Duckbill / Type 2 Flash Hider

Manufacturer - Linemount

Notes: 5.56; 1/2x28 Thread

Gas Tube‍

Mid-Length Length Gas Tube

‍Manufacturer - Palmetto State Armory

Upper Receiver‍

M16 Upper Receiver‍

Rifle Feed Ramps

‍Manufacturer - Harrington & Richardson

Rear Sight

A1 Sight Assembly

‍Manufacturer - LUTH AR

A1 Ejection Port Cover

‍Manufacturer - Harrington & Richardson

Charging Handle

Milspec AR-15 Charging Handle

‍Manufacturer - Palmetto State Armory

Bolt Carrier Group

Slick Bolt Carrier Group

‍Manufacturer - Brownells

Notes: Chrome Lined; Hardened to USGI Specifications

Handguard

USGI A1 Handguard

Manufacturer - Colt

Lower Receiver‍

Stealth Lower Receiver

Manufacturer - Palmetto State Armory

Notes: A2 Profile

Fire Control Group

ARC Fire 3-Position Fire Control Group

Manufacturer - AS Designs

Notes: Safe, Semi-Auto, Full Semi-Auto

Lower Parts Kit

AR-15 Basic Build Kit

Manufacturer - KAK Industry

Receiver Extension Assembly

Rifle Length Buffer Tube

Rifle Length Buffer Spring

Rifle Length Buffer

Manufacturer - LUTH AR

Notes: Buffer Weight: 5.1 oz

Pistol Grip‍

Bakelite A1 Grip

Manufacturer - Colt

Stock‍

Type D Stock

Manufacturer - Brownells

Stock Screw

A1 Length Stock Screw

Manufacturer - Linemount

Magazine

USGI Style 30-Round Magazine

Manufacturer - Brownells

Attachments / Accessories

Sling

M1 Sling

Tools Used / Recommended Tools

Bench Vice

Notes: Needed for holding receivers in place during assembly.

Upper Receiver Rod

Notes: Keeps barrel secure while torquing barrel nut(very important), installing muzzle devices and keeps upper receiver stable while installing sights/optics.

Handguard Tool

Notes: Makes install & removal of handguards far easier on rifles with Slip & Delta rings.

Lower Receiver Vise Block

AR-15 Armorer's Wrench

Notes: Needed for barrel nut and buffer tube installs, helps with muzzle devices that are compatible.

Torque Wrench

Notes: Needed for installation of barrel nut.

Pin Starter Punch Set

Notes: Helps with installing trickier roll pins such as bolt catch or trigger guard.

Pin Punch Set

Center Punch Set

Notes: Needed for staking endplates / castle nuts on carbine buffer tubes.

Takedown Pin Install Tool

Notes: Greatly decreases the difficulty of installing front takedown pins without losing detents / springs.

3/16" Hex T-Handle Wrench

Notes: Allows easy access for removal & installation of pistol grips ensuring proper torque for installation.

Snap Ring Pliers

Notes: Needed for indexing snap ring that holds Slip / Delta ring while installing gas tube into upper receiver on milspec barrel nuts.

5.56 NATO Headspace Gauges

Notes: Used for ensuring proper chamber headspace between your bolt and barrel.

A list of parts and tools used can be found below. For those who want to build their own Dissipator.