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Colt AR-15 Shop Services
It is our machine shop goal to provide highly engineered craftsmanship and professional
workmanship that you can always trust - whether your firearm is part of a collection or a
weapon carried every day.
Specialized Armament utilizes an extensive array of Colt Factory tools and technical
information as well as many other custom built tools, fixtures and gages which allow our
specially trained personnel to do the highest quality work.
Colt Carbines
| RELIABILITY PACKAGE - Colt AR-15/M16/M4 |
$150 |
This small group of proprietary modifications and upgraded parts was designed to ensure
flawless operation under adverse conditions and to allow the system to perform at its optimum.
The Package includes:
- 4 to 6 barrel modifications (depending on barrel type)
- 3 gas system modifications
- 2 bolt group modifications
- Buffer assembly and other lower receiver parts
The M16 is one of the most reliable designs ever produced and the Colt Factory builds an extremely
high quality product; however, even the best can often be better.
Any Colt parts purchased from Specialized Armament will be correctly assembled or installed at no
charge. This does not include Knight’s Armament, LaRue Tactical, Surefire or any other non-Colt parts
and accessories
Barrels
| Remove barrel assembly |
$20.00 |
without damage to gas tube, barrel, index pin, barrel nut or upper receiver. No marks on anything!
| Correctly install barrel assembly |
$75.00 |
Fixture align sights, torque barrel, install and align gas tube
| Swap barrel assemblies |
$99.00 |
Between any 2 Colt AR-15/M16 type firearms. Remove both barrels, correctly install barrels on their
new respective receivers.
| M4/M4A1 feed ramps |
$50.00 |
Machine M4 “deep” feed ramps on older carbine or rifle barrel extensions – required for use with any
Colt “M4” or “4” upper receiver.
| Modified feed ramps – Colt carbine |
$75.00 |
Machine secondary feed ramp cut and feed ramp relief cuts. A must for overall reliability, especially
with non-standard ammunition or M855 ball.
| Feed ramp – Surface finish |
$25.00 |
Abrasive polish feed ramp surfaces to a 2-4 micron finish – “mirror like”
| Re-port gas system |
$45.00 |
This procedure involves machining the barrel to increase gas flow for non-U.S. Mil-spec ammo that
often generates lower gas pressure in the M16 direct gas system. Gas flow through the port can be
mathematically calculated for any percentage increase desired.
| Thread barrel assembly |
$150.00 |
Disassemble the barrel assembly, machine barrel to correct length, turn correct outside diameter,
thread barrel, recrown muzzle, re-port gas system (if required), refinish barrel, re-assemble barrel
assembly.
| Thread barrel assy (bbl assy. installed) |
$195.00 |
Disassemble upper receiver group, disassemble the barrel assembly, machine barrel to correct length,
turn correct outside diameter, thread barrel, recrown muzzle, re-port gas system (if required), refinish
barrel, re-assemble barrel assembly, correctly install barrel with sight alignment, re-assemble upper
receiver group.
| Refinish barrel assembly – and related parts |
$75.00 |
Disassemble barrel assembly; refinish barrel, flash suppressor, sight base, sight post, detent, handguard
cap, and barrel nut to U.S. Mil-spec DOD-P-16232F Type M; re-assemble; correctly rivet sling swivel
with Colt factory tools.
| Correct improper sight alignment |
$45.00 - $95.00 |
Re-pin front sight base with oversized taper pins, fixture align sights.
| Install GemTech Bi-Lock – without shims or washers |
$45.00 |
Machine/counter bore Bi-Lock for precise fit and orientation to a specific Colt barrel assy., refinish
after machining, correctly install Bi-Lock. This service does not include the GemTech Bi-Lock.
Pinned & Welded Compensator (bbl assy. installed)
(14.5 inch Barrels) |
$195 |
Disassemble upper receiver group, Disassemble the barrel assembly, Grit blast treads and compensator
for welding, Re-assemble barrel assembly, Machine barrel & compensator, Press hardened pin, TIG
weld pin to compensator, Turn compensator outer diameter, Deburr and polish compensator, Refinish
barrel and compensator, Correctly install barrel with proper sight alignment, Re-assemble upper
receiver group.
| Test fire weapons: |
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Semi-auto |
$25.00 |
Select-fire |
$45.00 |
Zero weapon; for accuracy and sight alignment (target provided) |
$45.00 |
Quantity discounts and service packages available upon request.
Upper Receiver
Install Free-Floating Handguard Systems
Knights Armament Co. (KAC) & LaRue only |
$95.00 |
Note: These units cannot be installed on any barrel assy. with a permanently attached muzzle device.
| Upper Receiver – Machine correct M4 feed ramps |
$50.00 |
This modification will allow older Colt AR-15 & M16 uppers, as well as current production Colt rifle
uppers, to function more reliably with all new Colt carbine/Commando barrels made after 1992. These
feed ramps were a definite improvement in the M4 series carbines.
| Assemble upper receiver |
$25.00 |
sights, ejection port cover, forward assist.
Lower Receiver
| Machine Lower Receiver – pivot pin assy. |
$50.00 |
Machine Colt Semi-automatic lower receivers (0.250 in. “small” pivot pin hole) to accept pivot pin
detent and spring. This precision modification allows the use of the M16 style pivot pin assy. (3 piece)
– replacing the pin and screw assy. Parts not included.
| Assemble Lower Receiver |
$25.00 |
lower receiver parts less buttstock assembly.
| Assemble Lower Receiver Group |
$45.00 |
lower receiver parts and buttstock assembly.
| Install Colt M4 collapsible stock assembly |
$25.00 |
with Factory two place staking.
| Remove rifle/fixed stock, install M4 collapsible stock |
$25.00 |
Remove M4 collapsible stock, install rifle/fixed stock |
$25.00 |
Bolt Group
| Refinish and rebuild bolt assembly |
$45.00 |
Refinish all bolt parts; replace gas rings, extractor spring assembly, ejector spring; clean and gage
firing pin and firing pin hole.
9mm SMG & Carbine
| Machine improved cocking angle on bolt assembly |
$199.00 |
refinish, install improved bolt weight
Dramatically reduces impact ware on fire-control parts; new cocking angle requires the use of improved
bolt weight. We recommend either the “B” or “X” buffer (depending on ammunition) for use with this
modification.
Special Purpose Buffers
Designed for suppressed SMG’s or 9mm carbines using high pressure (+P+) ammunition
| Buffer (A) 6.3oz |
$79.00 |
Buffer (B) 7.1oz |
$89.00 |
Buffer (X) 7.9oz |
$99.00 |
Any Colt parts purchased from Specialized Armament will be correctly assembled or installed at no
charge. This does not include Knight’s Armament, LaRue Tactical, Surefire or any other non-Colt
parts and accessories |
